SMC D-M9 Solid State Auto Switch User Manual

PRODUCT NAME
Solid State Auto Switch
MODEL / Series / Product Number
D-M9## D-M9#W# D-M9#E#

Safety Instructions

These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution”, “Warning” or “Danger”.
They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC)1), and other safety regulations.
1) ISO 4414: Pneumatic fluid power — General rules relating to systems.
ISO 4413: Hydraulic fluid power — General rules relating to systems.
IEC 60204-1: Safety of machinery — Electrical equipment of machines .(Part 1: General requirements)
ISO 10218: Manipulating industrial robots -Safety. etc.

Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

Warning

1. The compatibility of the product is the responsibility of the person who designs the equipment or decides its specifications.
   Since the product specified here is used under various operating conditions, its compatibility with specific equipment must be decided by the person who designs the  equipment or decides its specifications based on necessary analysis and test results.
   The expected performance and safety assurance of the equipment will be the responsibility of the person who has determined its compatibility with the product.
   This person should also continuously review all specifications of the product referring to its latest catalog information, with a view to giving due consideration to any  possibility of equipment failure when configuring the equipment.

2. Only personnel with appropriate training should operate machinery and equipment.
   The product specified here may become unsafe if handled incorrectly.
   The assembly, operation and maintenance of machines or equipment including our products must be performed by an operator who is appropriately trained and experienced.

3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.

4. The inspection and maintenance of machinery/equipment should only be performed after measures to prevent falling or runaway of the driven objects have been  confirmed.

5. When the product is to be removed, confirm that the safety measures as mentioned above are implemented and the power from any appropriate source is cut, and  read and understand the specific product precautions of all relevant products carefully.

6. Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.

7. Contact SMC beforehand and take special consideration of safety measures if the product is to be used in any of the following conditions.

8. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to direct sunlight.

9. Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping, vehicles, military, medical treatment, combustion and recreation,  or equipment in contact with food and beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or other applications  unsuitable for the standard specifications described in the product catalog.

10. An application which could have negative effects on people, property, or animals requiring special safety analysis.

11. Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a mechanical protective function, and periodical checks to confirm proper operation.

Caution

1. The product is provided for use in manufacturing industries.
   The product herein described is basically provided for peaceful use in manufacturing industries.
   If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary.
   If anything is unclear, contact your nearest sales branch.

Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance Requirements”.
Read and accept them before using the product.

Limited warranty and Disclaimer

1. The warranty period of the product is 1 year in service or 1.5 years after the product is delivered, whichever is first.∗2)
   Also, the product may have specified durability, running distance or replacement parts.
   Please consult your nearest sales branch.

2. For any failure or damage reported within the warranty period which is clearly our responsibility, a replacement product or necessary parts will be provided.
   This limited warranty applies only to our product independently, and not to any other damage incurred due to the failure of the product.

3. Prior to using SMC products, please read and understand the warranty terms and disclaimers noted in the specified catalog for the particular products.
   ∗2) Vacuum pads are excluded from this 1 year warranty.
   A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
   Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or failure due to the deterioration of rubber material are not covered by  the limited warranty.

Compliance Requirements

1. The use of SMC products with production equipment for the manufacture of weapons of mass destruction (WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are governed by the relevant security laws and regulation of the countries involved in the  transaction. Prior to the shipment of a SMC product to another country, assure that all local rules governing that export are known and followed.

Operator

• This operation manual is intended for those who have knowledge of machinery using pneumatic equipment, and have sufficient knowledge of assembly, operation and  maintenance of such equipment. Only those persons are allowed to perform assembly, operation and maintenance.
• Read and understand this operation manual carefully before assembling, operating or providing maintenance to the product.

Warning

• Do not disassemble, modify (including changing the printed circuit board) or repair.
  An injury or failure can result.

• Do not operate the product outside of the specifications.
  Do not use for flammable or harmful fluids.
  Fire, malfunction, or damage to the product can result.
  Verify the specifications before use.

• Do not operate in an atmosphere containing flammable or explosive gases.
  Fire or an explosion can result.
  This product is not designed to be explosion proof.

• If using the product in an interlocking circuit:

• Provide a double interlocking system, for example a mechanical system.

• Check the product regularly for proper operation.
  Otherwise malfunction can result, causing an accident.

• The following instructions must be followed during maintenance:

• Turn off the power supply.

• Stop the air supply, exhaust the residual pressure and verify that the air is released before performing maintenance.
  Otherwise an injury can result.

Caution

• Do not touch terminals and printed circuit board inside the product.
  Otherwise it can cause electric shock, malfunction or damage to the product can result.

• After maintenance is complete, perform appropriate functional inspections.
  Stop operation if the equipment does not function properly.
  Safety cannot be assured in the case of unexpected malfunction.

Cylinders or actuators include cylinders, air grippers, rotary actuators, and electrical actuators/cylinders.

Design/Selection

1. Confirm the specifications.
   If the product is used with excess load applied or beyond the specification range, this may cause the product to break or malfunction. We do not guarantee against any  damage if the product is used outside of the specification range.

2. Pay attention to the length of time that a switch is ON at an intermediate stroke position.
   When an auto switch is placed at an intermediate position of the stroke and a load is driven at the time the piston passes, the auto switch will operate, but the operating  time will be short if the speed is too fast. As a result, the load may not operate completely. The maximum detectable piston speed is:

3. Take precautions when multiple cylinders/ actuators are used close together.
   When multiple auto switch cylinders/actuators are used in close proximity, magnetic field interference may cause the auto switches to malfunction. Maintain a minimum  cylinder separation of 40 mm. (When the allowable interval is specified for each cylinder series, use the indicated value.)
   The auto switches may malfunction due to the interference from the magnetic fields.
   Use of a magnetic screen plate (MU-S025) or commercially available magnetic screen tape can reduce the interference of magnetic force.

4. Ensure sufficient clearance for maintenance activities.
   When designing an application, be certain to allow sufficient clearance for maintenance.

5. Do not mount the cylinder or actuator with the auto switch on a footing.
   If work personnel gets on or puts the work personnel’s foot on the footing accidentally, an excessive load is applied to the cylinder or actuator, causing the cylinder or  actuator to break.

6. Design the circuit so that any back-flow current does not flow in if a short-circuit trouble occurs or forced operation is performed to check the operation.
   If a back-flow current occurs, this may cause the switch to malfunction or break.

7. When multiple auto switches are required.
   “n” indicates the number of auto switches which can be physically mounted on the cylinders/actuators. Detection intervals depends on the auto switch mounting  structure and set position, therefore some required interval and set positions may not be available.

8. Limitations on detectable position
   There are positions or surfaces (bottom surface of the foot bracket, etc.) where the auto switch cannot be mounted due to the physical interference depending on the  cylinder or actuator mounting status or mounting bracket. Select an appropriate auto switch setting position where the auto switch does not interfere with the cylinder or  actuator mounting bracket (trunnion or reinforcing ring) after checking it sufficiently.

9. Keep wiring as short as possible.
   Be sure to use a wire length of 100 m or less.
   When the wire length is long, we recommend the ferrite core is attached to the both ends of the cable to prevent excess noise. A contact protection box is not necessary  for solid state switches due to the nature of this product construction.

10. Do not use a load that generates surge voltage.
    If driving a load such as a relay that generates a surge voltage, use a built- in surge absorbing element type device.

11. Pay attention to the internal voltage drop of the auto switch.
    Generally, the internal voltage drop of the solid state auto switch is larger than that of the reed auto switch. When the auto switches (“n” pcs.) are connected in series, the voltage drop is multiplied by “n”. In this case, the auto switches operate correctly, but the loads may not operate. Additionally, note that the 12 VDC relay does not apply  to the auto switch.

12. Pay attention to leakage current.
    <2-wire type>
    Current (leakage current) flows to the load to operate the internal circuit when in the OFF state.
    Operating current of load (OFF condition) > Leakage current
    If the criteria given in the above formula are not met, it will not reset correctly (stays ON).
    Use a 3-wire auto switch if this specification will not be satisfied.
    Moreover, leakage current flow to the load will be “n” times larger when “n” auto switches are connected in parallel.

13. Output operation of the solid state auto switch is not stable for 50 [ms] after powered ON.
    In the output operation immediately after powered ON or AND connection operation, the input device (PLC or relay, etc.) may judge the ON position as OFF output  or the OFF position as ON output.
    So, please make the setting on the equipment so that the input judgement signal is set disabled for 50 [ms] immediately after powered ON or AND connection.
    When using SMC’s AHC system (Auto Hand Changing System) Series MA, please also make this setting.

Mounting/Adjustment

1. Do not drop or bump.
   Do not drop, bump, or apply an excessive impact (300 m/s or more for solid state auto switches) while handing the auto switch. It may cause the auto switch to break or  malfunction. or more for reed auto switches, 1000 m/s

2. Observe the proper tightening torque for mounting an auto switch.
   When an auto switch is tightened beyond the range of tightening torque, auto switch mounting screws, auto switch mounting brackets or auto switch may be damaged.
   On the other hand, tightening below the range of tightening torque may allow the auto switch to slip out of position.

3. Do not carry a cylinder by the auto switch lead wires.
   This may cause disconnection of the lead wire or the internal element to break.

4. Do not use screws other than the set screws installed on the auto switch body to secure the auto switch.
   If using other screws, auto switch may be damaged.

5. Mount an auto switch at the center of the operating range.
   In the case of 2-color display auto switch, mount it at the center of the green LED illuminating range.
   Adjust the mounting position of the auto switch so that the piston stops at the center of the operating range.
   (The mounting position shown in the catalog indicates the optimum position at stroke end.)
   If mounted at the end of the operating range (around the borderline of ON and OFF), operation will be unstable depending on the operating environment. Also there  are some cylinders or actuators with individual setting methods for auto switches. If so, mount it in accordance with the indicated method.
   Even if 2-color indication solid state auto switches are fixed at a proper operating range (the green light lights up), the operation may become unstable depending on the  installation environment or magnetic field disturbance.
   (Magnetic body, external magnetic field, proximal installation of cylinders with built-in magnet and actuators, temperature change, other factors for magnetic force  fluctuation during operation, etc.)

6. Check the actual actuation status and adjust the auto switch mounting position.
   According to the installation environment, the cylinder or actuator may not operate even at its proper mounting position.
   Even when setting at a midpoint of the stroke, check the actuation status and make the adjustment in the same manner.

Wiring

1. Confirm proper insulation of wiring.
   If there is any improper insulation (mixed contact with other circuit, grounding fault, or improper insulation between terminals, etc.) in the wiring, an over-current flows  in, causing the auto switch to break.

2. Wire separately from power lines or high voltage lines, avoiding parallel wiring or wiring in the same conduit with these lines.
   If an inrush current is generated, the noise may cause the auto switch to malfunction.

3. Avoid repeatedly bending or stretching lead wires.
   Broken lead wires will result from repeatedly applying bending stress or stretching force to the lead wires.
   Stress and tensile force applied to the connection between the lead wire and auto switch increases the possibility of disconnection.
   Keep the lead wire from moving especially in the area where it connects with the auto switch.

4. Be certain to connect the load before power is applied. <2-wire type>
   If the power is turned ON when an auto switch is not connected to a load, the auto switch will be instantly damaged because of excess current (short circuit).
   It is the same as when the 2-wire brown lead wire (+, output) is directly connected to the (+) power supply terminal.

5. Carry out the wiring work after shutting down the power.
   If the wiring work is performed with the power turned ON, this may cause electric shock, malfunction, or damage to the auto switch.

6. Do not allow short-circuit of loads.
   Otherwise, the protection circuit will be activated and the indicator light will flash.
   At the same time, the auto switch will be damaged.

7. Avoid incorrect wiring.

8. If connections are reversed on a 2-wire type auto switch, the auto switch will not be damaged if protected by a protection circuit, but the auto switch will always stay in an ON state.
   However, it is still necessary to avoid reversed connections, since the auto switch could be damaged by a load short circuit in this condition.

9. If connections are reversed (power supply line + and power supply line –) on a 3-wire type auto switch, the auto switch will be protected by a protection circuit.  However, if the power supply line (+) is connected to the blue wire and the power supply line (–) is connected to the black wire, the auto switch will be damaged.

Operating Environment

1. Never use in an atmosphere of explosive gases.
   The structure of auto switches is not intended to prevent explosion. This may lead to explosion hazard.
   Contact SMC for information regarding explosion proof compliant product.

2. Do not use in an area where a magnetic field is generated.
   Auto switches will malfunction or magnets inside cylinders/ actuators will become demagnetized. (Please consult with SMC if a magnetic field resistant auto switch can  be used.)

3. Do not use in an environment where the auto switch will be continually exposed to water.
   Although auto switches satisfy the IEC standard IP67specificaitons, do not use in applications continually exposed to water splashing or spray. This may cause improper  insulation or malfunction.

4. Do not use in an environment with oil or chemicals.
   If auto switches are used in an environment containing coolant, cleaning solvent, various oils, or chemicals even for a short period of time, this may adversely affect the  auto switches, resulting in improper insulation, malfunction due to swelling of the potting resin, or hardening of the lead wires.

5. Do not use in an environment with temperature cycles.
   If temperature cycles other than normal temperature changes are applied, this may adversely affect the insides of the auto switches.

6. Avoid accumulation of iron waste or close contact with magnetic substances.
   If many iron particles, such as cutting chips or spatters accumulate around a cylinder with the auto switches or an actuator or if a magnetic substance (attracted by a  magnet) is put close to a cylinder with the auto switch or an actuator, the magnetic force inside the cylinder or actuator loses, causing the auto switch to malfunction.

7. Do not use in an area where surges are generated.
   If there is an equipment unit (electromagnetic lifter, high-frequency induction furnace, motor, or radio, etc.) that generates large surges or electromagnetic waves around  cylinders with solid state auto switches or actuators, this may cause the circuit element inside the auto switch to break.

8. Please contact SMC concerning water resistance, elasticity of lead wires, usage at welding sites, etc.

9. Do not use in direct sunlight.

10. Do not mount the product in locations where it is exposed to radiant heat.

11. Take appropriate measures against the lightning surge on the equipment side as the auto switches do not have any lightning surge resistance specified in the CE/UKCA  marking.

12. Do not use in environments subject to radiation stress.
    It is not designed to withstand radiation, which may cause damage to the internal circuit elements of the auto switch.

Maintenance

1. Perform the following maintenance periodically in order to prevent possible danger due to unexpected auto switch malfunction.

2. Secure and tighten auto switch mounting screws.
   If screws become loose or the mounting position is dislocated, retighten them after readjusting the mounting position.

3. Confirm that there is no damage to lead wires.
   To prevent faulty insulation, replace auto switches or repair lead wires, etc., if damage is discovered.

4. Confirm the detection setting position.
   • Red light of 1-color display auto switch
   Confirm that the set position stops at the center of the operating range (red display area).
   • Confirm the green light and position of the 2-color display auto switch.
   Confirm that the set position stops at the center of the appropriate operating range (green display area).
   If the auto switch shows a red LED while in the ON/OFF position, the mounting position is not correct. Re-adjust the auto switch to the optimum position at the  center of the operating range.
   Some cylinders or actuators indicate the individual setting procedures for the auto switch. If so, set the mounting position using the individual setting procedures.

5. Do not use solvents such as benzene, thinner etc. to clean the product.
   They could damage the surface of the body and erase the markings on the body. For heavy stains, use a cloth lightly dampened with diluted neutral detergent, then wipe up any residue with a dry cloth.

Model Indication and How to Order

Summary of Product parts

•D-M9B(W/E)/D-M9N(W/E)/D-M9P(W/E)

•D-M9B(W/E)V/D-M9N(W/E)V/D-M9P(W/E)V

Definition and terminology

| Term| Meaning and definition
---|---|---
2| 2-color indication| A type of indicating methods which lights up the Red LED light up when the Auto switch comes to the operating position, and lights up the Green LED when the Auto switch comes to the optimum operating position.
2-wire Auto switch| Auto switch which has only signal line and COM line.
C| Current leakage| The current flowing to the load when the Auto switch turns off.
H| Hysteresis| The difference between the points when the Auto switch turns on and off, which is provided to prevent
chattering.
I| Internal voltage drop| The voltage applied between the COM and signal line when the Auto switch turns on.
L| Load current| The current flowing to the load when the Auto switch turns on.
M| Most sensitive position| The center position of the sensor unit (which gets the strongest reaction of the sensor unit), which means the center position of an operating range as well.
N| NPN output| Auto switch which sinks current from the signal line when turning on.
: This circuit diagram is a sample.
Normally open (normal direction) output| When magnetic force is detected, the output signal turns ON.
Normally closed (inverted) output| When magnetic force is not detected, the output signal turns ON.
P| PNP output| Auto switch which sources current from the signal line when turning on.
: This circuit diagram is a sample.
R| Reed Auto switch| Auto switch which generates on and off outputs with a mechanical contact.
S| Sequence controller (PLC)| The device to perform sequence control, which performs controlling such as receipt of inputs from the Auto switch along with programming and sending of the output to other machines.
Solid state Auto switch| Auto switch which generates on and off outputs with or without mechanical contact such as a transistor.

Mounting and Installation

Installation
When mounting the Auto switch to the actuator, the appropriate mounting bracket should be used.
“How to mount” depends on the actuator type and bore size.
Please refer to the actuator catalogue.
For new Auto switch applications, confirm that the actuator includes a magnet before assembling the Auto switch and bracket.

Tightening torque
Use a watchmaker driver whose grip diameter is 5 to 6 mm when tightening the mounting screw.
M2.5 mount screw tightening torque shall be 0.05 to 0.15 NM (0.5 to 1.5 kgf·cm)

Setting the detection position
Position the actuator at the end of the stroke.
Set the Auto switch in the position where the Auto switch Green light is ON.
(Detecting actuator end)
Based on A and B dimensions in the actuator catalogue, set the Auto switch position.
During installation, perform adjustment while checking the operating conditions of the Auto switch.
Air grippers and rotary actuators have their own setting method.
Follow the instructions in the relevant manual.

Internal circuit

∗: The number marked on each lead wire color shows the pin number of pre-wired connector.
Connection with PLC (sequence controller)

Maintenance

After the power has been disconnected, please observe the following precautions:-
Regarding the actuator operation set up, the contents of the program may be maintained by the customer’s application system.
Take care to confirm safety when the power is re-connected, and the actuator operation is resumed, because the operation may have stopped in an unstable condition.

Troubleshooting

When the Auto switch falls in operation failure, identify the trouble with the following flow chart.
A failure of the Auto switch might depend on operating environment (application etc.) and needs to be given a measure by contacting to us separately.
Contact type: Normally open (normal direction) output

Trouble list

Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
1| The switch output doesn’t turn off. The operation LED doesn’t go off.| Malfunction due to disturbance magnetic field| The effect of magnetic field generated by adjacent actuator| Place a magnetic shield plate to the actuator.
Improper setting (mounting) position *Narrow angle| The presence of the following conditions
Switch operating range

Actuator operating stroke| Displace the Auto switch set position from the center of the actuator operating range.
2| The switch output doesn’t turn off. The operation LED doesn’t turn on.| Product failure| | Replace the product.
3| The switch output doesn’t turn off. The operation LED operates properly.| Mismatch the load current specification (2-wire)| Satisfaction of the following relations by the load current specification Load voltage is “ON” level
(Current leakage x n) x load resistance or
Load current is “OFF” level
(Current leakage x n)
n: The number of parallel connecting switches| Select 3-wire Auto switch or reed Auto switch.
Reduce the number of switches.
Incorrect wiring (3-wire)| Reverse connection of wiring (black and blue)| Correct wiring.
(Refer to “Internal circuit” on page 13.)
Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
4| The switch output doesn’t turn on. The operation LED doesn’t turn on.| Power supply failure| Power supply voltage (zero or extremely low)| Adjust power supply voltage to a given value.
(Refer to “Power supply voltage or Load voltage” in Specifications on page 23.)
Incorrect wiring| Voltage (load) applied to the Auto switch| Correct wiring.
(Refer to “Internal circuit” on page 13.)
Reverse connection of wiring (black and blue)
Improper setting (mounting) position| Detection close to the limit of operating range| Move the Auto switch to proper position (near the center of the switch operating angle).
Displacement from set position| Looseness of the switch unit or switch mounting screw| Fix to proper position at appropriate torque. (Tightening torque: 0.05 to 0.15 NM)
Displacement of the actuator stopping angle| Deviation of the actuator stopping angle (position)| Stabilize stop position.
Lowering of magnetic force for detection (demagnetization)| The presence of magnetic filed source near the actuator (electric welding machine conductor and strong magnet, etc.)| Place a magnetic shield plate between magnetic filed source and the actuator.
The effect of magnetic field generated by adjacent actuator (placed within 20 mm)| Separate the actuator (by 40 mm or more). Place a magnetic shield plate.
The presence of deposit of magnetic material (cutting chip) on the actuator| Remove the magnetic deposit.
Breakage of lead wire| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)
Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
5| The switch output doesn’t turn on. The operation LED operates properly.| Mismatch the load current specification (2-wire)| Satisfaction of the following relations by the load current specification
Load voltage is “ON” level
Load voltage – (Internal voltage drop x n)
n: The number of series connecting switches| Select 3-wire Auto switch or reed Auto switch.
Reduce the number of switches.
Incorrect wiring (output line)(3-wire)| Condition of connected part (connector contact pin and crimping terminal)| Correct wiring. (Perform wiring of connected part again.)
Breakage of lead wire (black) (3-wire)| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)
6| The operation is unstable. (chattering)| Improper setting (mounting) position| Detection close to the limit of switch operating angle| Move the switch to proper position (near the center of the switch operating angle).
Displacement from set position| Looseness of the switch unit or switch mounting screw| Fix to proper position at appropriate torque. (Tightening torque: 0.05 to 0.15 N•m)
Incorrect wiring| Condition of connected part (connector contact pin and crimping terminal)| Correct wiring. (Perform wiring of connected part again.)
Check if the load has a short circuit (not connected).| Correct wiring.
(Refer to “Internal circuit” on page 13.)
Breakage of lead wire| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)
Malfunction due to disturbance magnetic field| The presence of magnetic field source near the actuator (cylinder, electric welding machine conductor, motor, magnet etc.)| Place a magnetic shield plate between magnetic field source and the actuator, or separate magnetic field source from the actuator.
The switch operates at multiple points.| Malfunction due to disturbance magnetic field| The effect of magnetic field generated by adjacent actuator| Place a magnetic shield plate to the actuator.
The load doesn’t work.| Operating angle range Detection at intermediate position| Satisfaction of the following relations by the actuator rotation speed Load operating time [s] < Auto switch operating range [mm] / Actuation operating speed [mm/s]| Decrease the actuating driving speed until specified relations can be satisfied.

Contact type: Normally closed (inverted) output

Trouble list

Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
1| The switch output doesn’t turn on. The operation LED doesn’t go on.| Malfunction due to disturbance magnetic field| The effect of magnetic field generated by adjacent actuator| Place a magnetic shield plate to the actuator.
Improper setting (mounting) position *Narrow angle| The presence of the following conditions Switch operating range >Actuator operating stroke| Displace the Auto switch set position from the center of the actuator operating range.
2| The switch output doesn’t turn on. The operation LED doesn’t turn off.| Product failure| | Replace the product.
3| The switch output doesn’t turn on. The operation LED operates properly.| Mismatch the load current specification (2-wire)| Satisfaction of the following relations by the load current specification
Load voltage is “ON” level

(Current leakage x n) x load resistance or
Load current is “OFF” level
(Current leakage x n)
n: The number of parallel connecting switches| Select 3-wire Auto switch or reed Auto switch.
Reduce the number of switches.
Incorrect wiring (3-wire)| Reverse connection of wiring (black and blue)| Correct wiring.
(Refer to “Internal circuit” on page 13.)
Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
4| The switch output doesn’t turn off. The operation LED doesn’t turn off.| Power supply failure| Power supply voltage (zero or extremely low)| Adjust power supply voltage to a given value.
(Refer to “Power supply voltage or Load voltage” in Specifications on page 23.)
Incorrect wiring| Voltage (load) applied to the Auto switch| Correct wiring.
(Refer to “Internal circuit” on page 13.)
Reverse connection of wiring (black and blue)
Improper setting (mounting) position| Detection close to the limit of operating range| Move the Auto switch to proper position (near the center of the switch operating angle).
Displacement from set position| Looseness of the switch unit or switch mounting screw| Fix to proper position at appropriate torque. (Tightening torque: 0.05 to 0.15 N•m)
Displacement of the actuator stopping angle| Deviation of the actuator stopping angle (position)| Stabilize stop position.
Lowering of magnetic force for detection (demagnetization)| The presence of magnetic filed source near the actuator (electric welding machine conductor and strong magnet, etc.)| Place a magnetic shield plate between magnetic filed source and the actuator.
The effect of magnetic field generated by adjacent actuator (placed within 20 mm)| Separate the actuator (by 40 mm or more). Place a magnetic shield plate.
The presence of deposit of magnetic material (cutting chip) on the actuator| Remove the magnetic deposit.
Breakage of lead wire| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)
Trouble No.| Trouble| Possible cause| Investigation to find possible cause| Countermeasure
---|---|---|---|---
5| The switch output doesn’t turn off. The operation LED operates properly.| Mismatch the load current specification (2-wire)| Satisfaction of the following relations by the load current specification Load voltage is “ON” level > Load voltage – (Internal voltage drop x n) n: The number of series connecting switches| Select 3-wire Auto switch or reed Auto switch.
Reduce the number of switches.
Incorrect wiring (output line) (3-wire)| Condition of connected part (connector contact pin and crimping terminal)| Correct wiring. (Perform wiring of connected part again.)
Breakage of lead wire (black) (3-wire)| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)
6| The operation is unstable. (chattering)| Improper setting (mounting) position| Detection close to the limit of switch operating angle| Move the switch to proper position (near the center of the switch operating angle).
Displacement from set position| Looseness of the switch unit or switch mounting screw| Fix to proper position at appropriate torque. (Tightening torque: 0.05 to 0.15 N•m)
Incorrect wiring| Condition of connected part (connector contact pin and crimping terminal)| Correct wiring. (Perform wiring of connected part again.)
Check if the load has a short circuit (not connected).| Correct wiring.
(Refer to “Internal circuit” on page 14.)
Breakage of lead wire| The presence of repeated bending stress to a part of lead wire (bending radius, tensile force to the lead wire)| Correct wiring.
(Adjust tensile force and enlarge bending radius.)

Malfunction due to disturbance magnetic field

| The presence of magnetic field source near the actuator (cylinder, electric welding machine conductor, motor, magnet etc.)| Place a magnetic shield plate between magnetic field source and the actuator, or separate magnetic field source from the actuator.
The switch operates at multiple points.| Malfunction due to disturbance magnetic field| The effect of magnetic field generated by adjacent actuator| Place a magnetic shield plate to the actuator.
The load doesn’t work.| Operating angle range
Detection at intermediate position| Satisfaction of the following relations by the actuator rotation speed Load operating time [s] < Auto switch operating range [mm] / Actuation operating speed [mm/s]| Decrease the actuating driving speed until specified relations can be satisfied.

Specifications

•D-M9B(E)(V)/D-M9N(E)(V)/D-M9P(E)(V)
PLC: Programmable Logic Controller

is detected
The Red LED turns ON
Normally closed (inverted) output:
When magnetic force is not detected
Electrical entry| Grommet
Lead wire| Vinyl sheath cable f2.6, 0.15 mm2, 2-wire (D-M9B(E)(V)), 3-wire (D-M9N(E)(V),D-M9P(E)(V))
Impact proof| 1000 m/s2
Insulation resistance| 50 MΩ or more under the test voltage 500 VDC (between case and cable)
Withstand voltage| 1000 VAC 1 min. (between case and cable)
Ambient temperature| -10 to 60 °C
Enclosure| IEC 60529 criteria IP67, JISC0920 watertight construction

•D-M9BW(V)/D-M9NW(V)/D-M9PW(V)

position: The Green LED turns ON
Electrical entry| Grommet
Lead wire| Vinyl sheath cable f2.6, 0.15 mm2, 2-wire (D-M9BW(V)), 3-wire (D-M9NW(V),D-M9PW(V))
Impact proof| 1000 m/s2
Insulation resistance| 50 MΩ or more under the test voltage 500 VDC (between case and cable)
Withstand voltage| 1000 VAC 1 min. (between case and cable)
Ambient temperature| -10 to 60 °C
Enclosure| IEC 60529 criteria IP67, JISC0920 watertight construction
Standard| CE/UKCA marked

Dimensions
•D-M9B(W/E)/D-M9N(W/E)/D-M9P(W/E)

D-M9B(W/E)V/D-M9N(W/E)V/D-M9P(W/E)V

Pre-wired connector

Revision history
A: Standardize each contents for series D-M9.
B: Modify the contents.
C: Limited warranty and Disclaimer are added.
D: Solid state auto switch changed.
D-M9## added.
E: Solid state auto switch changed.
D-M9#E(V) added. [June 2018] F: Contents revised in several places.
[March 2019] G: Contents are added. [July 2022]

SMC Corporation
4-14-1, Sotokanda, Chiyoda-cu, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: +81 3 5298 5362
URL https://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2008-2022 SMC Corporation All Rights Reserved
Nod-※S-OMJ0004-G

Documents / Resources

| SMC D-M9 Solid State Auto Switch [pdf] User Manual
D-M9 Solid State Auto Switch, D-M9, Solid State Auto Switch, State Auto Switch, Auto Switch
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References

• SMC株式会社

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