AVENTICS PM1 Electromechanical Pressure Switch Instruction Manual

AVENTICS PM1 Electromechanical Pressure Switch

About This Documentation

Read this documentation carefully, especially the section “Notes on Safety” , before working with the product.
These instructions contain important information on the safe and appropriate assembly, operation, and maintenance of the product and how to remedy simple malfunctions yourself.

Additional documentation
In addition to this documentation, you will obtain further documents on the product or the machine/system where it is installed.

Observe all documents supplied with the system or machine. Additionally always observe the following regulations:

• General, statutory and other binding rules of the European and national laws.
• Applicable regulations for accident prevention and environmental protection.

Presentation of information

Warnings
Warnings of personal injury and damage to property are highlighted in this docu-mentation. The measures described to avoid these hazards must be followed.

Display as highlighted box
Warnings are displayed in the form of highlighted boxes with the following structure:

SIGNAL WORD

Hazard type and source

Consequences

• Precautions

Presentation with highlighted signal word
Instructions and lists often contain warnings that are integrated into the text. They are introduced with a bold signal word:

CAUTION! Do not exceed permissible bending radii.

Meaning of the signal words

Failure to observe these notices can result in serious health conse quences, including death.

Caution| Possible dangerous situation.

Failure to observe these notices may result in minor injuries or damage to property.

Symbols

Recommendation for the optimum use of our products.
Observe this information to ensure the smoothest possible operation.

Notes on Safety

The product has been manufactured according to the accepted rules of current technology. Even so, there is a risk of injury or damage if the following general safety instructions and the specific warnings given in this instruction manual are not observed.

• Please read all these instructions carefully before working with the product.
• Keep these instructions in a location where they are accessible to all users at all times.
• Always include the operating instructions when you pass the product on to third parties.

Intended use
The product may only be commissioned after it has been installed in the machine/system for which it is intended.

• Only use the pressure switch to open and close electrical contacts using compressed air.
• Only use compressed air or hydraulic oil as the medium.
• Use is permitted only under the operating conditions and within the performance limits listed in the technical data.
• The pressure switch is only intended for industrial applications.

Intended use includes having read and understood these instructions completely, especially the section “Notes on Safety”.

Personnel qualifications
All tasks associated with the product require basic mechanical, pneumatic and electrical knowledge, as well as knowledge of the respective technical terms. In order to ensure operational safety, these tasks may only be carried out by qualified personnel or an instructed person under the direction of qualified personnel.
Qualified personnel are those who can recognize possible dangers and institute the appropriate safety measures, due to their professional training, knowledge, and experience, as well as their understanding of the relevant regulations pertaining to the work to be done. Qualified personnel must observe the rules relevant to the subject area.

General safety instructions

• Observe the valid local regulations to protect the environment in the country of use and to avoid workplace accidents.
• Only use AVENTICS products that are in perfect working order.
• Examine the product for obvious defects, such as cracks in the housing or missing screws, caps, or seals.
• Do not modify or convert the product. The warranty will not apply if the product is incorrectly assembled.
• Product warnings and information must be legible, i.e. not covered by paint, etc.

Safety instructions related to the product and technology

• Lay cables and lines so that they cannot be damaged and no one can trip over them.
• Do not operate the product in aggressive ambient air (e.g., solvent vapors).
• Do not use the product in environments that are not splashwater-proof.
• Operation in an explosive atmosphere is not permissible. There is a danger of fires and explosions!
• The product may not come into contact with aggressive substances in liquid or vapor form. These substances include benzene, acetone, nitro vapors, and liquids containing softeners.
• Only operate the product within the approved operating voltage range. Only operate M12x1 versions via power packs with protective extra-low voltage (PELV) and secure electrical isolation from the operating voltage in accordance with EN 60204, and form A versions in accordance with EN 175301-803 up to 250 V.
• Assembly outdoors is only permitted if there is sufficient protection against critical ambient conditions such as an aggressive or salty atmosphere, large fluctuations in temperature, etc.

Scope of Delivery

• 1x electromechanical pressure switch, form A or M12x1
• 1x electrical connector, depending on the version (only for form A)
• 2x mounting screw, for flange version (CNOMO without mounting screws)
• 1x O-ring, for flange version (CNOMO without O-ring)
• 1x Operating instructions

About This Product

Product description
The pressure switch is used to open or close an electrical contact when a preset pressure value is reached.

Performance specifications
An appropriate medium is applied to the pressure switch at the G1/4 connection or on the flange. A diaphragm actuates a microswitch (change-over switch) via a mechanism once the preset switching pressure is reached.

The contact switches (see g Fig. 6 and g Fig. 7)

• when pressure increases from 1-2 to 1-3 (form A)/from 1-2 to 1-4 (M12x1) – make contact (NO)
• on decreasing pressure from 1-3 to 1-2 (form A)/from 1-4 to 1-2 (M12x1) – break contact (NC)

For vacuum pressure switches (see g Fig. 8 and g Fig. 9)

• when the vacuum increases from 1-3 to 1-2 (form A)/from 1-4 to 1-2 (M12x1 – make contact (NO)
• on decreasing vacuum from 1-2 to 1-3 (form A)/from 1-2 to 1-4 (M12x1) – break contact (NC)

Overview of pressure switch form A – pneumatic flange connection
See g Fig. 1

1. O-ring ø 5×1.5
   (included in scope of delivery except for CNOMO version)

2. Electrical connector (depending on version)

3. Electrical connector central screw
   M3x35; MA = 0.4+0.1 Nm (depending on scope of delivery)

4. Cylinder screw M5 x 30 ISO 1207 (2x);
   MA = 2.5+0.5 Nm (included in scope of delivery except for CNOMO version)

5. Adjustment screw for fine adjustment,selfholding (the adjustment screw is permanently set in the CNOMO version and secured with sealing compound)

Overview of pressure switch form A – pneumatic connection,internal thread G1/4
See g Fig. 2

1. Electrical connector (depending on version)
2. Connection G1/4, MA = 12+1 Nm
3. Electrical connector central screw M3x35; MA = 0.4+0.1 Nm (depending on scope of delivery)
4. Adjustment screw for fine adjustment, self-holding

Overview of pressure switch M12x1 – pneumatic flange connection
See g Fig. 3

1. O-ring ø 5×1.5 (included in scope of delivery)

2. Cylinder screw M5x30 ISO 1207 (2x);
   MA = 2.5+0.5 Nm (included in scope of delivery)

3. M12 connection rotatable by 90° and 30° with detent, A-coding

4. Adjustment screw for fine adjustment, self-holding

Overview of pressure switch M12x1 – pneumatic connection, internal thread G1/4
See g Fig. 4

1. M12 connection rotatable by 90° and 30° with detent, A-coding
2. Connection G1/4, MA = 12+1 Nm
3. Adjustment screw for fine adjustment, self-holding
   INFO: For material numbers, please refer to the online catalog.

Overview of pressure switch with push-in fitting/without electrical connector – pneumatic connection, internal thread G1/4
See g Fig. 5

1. Push-in fitting

2. Connection G1/4, MA = 12+1 Nm

3. Thread for central screw M3x35
   Permissible tightening torque MA= 0.4 +0.1 Nm

4. Adjustment screw for fine adjustment, self-holding

Product identification

Observe the product information on the product and packaging.

Assembly

Let the product acclimatize for several hours before commissioning, otherwise,water may condense in the housing.

CAUTION
Danger of injury if assembled under pressure or voltage!
Assembling when under pressure or electrical voltage can lead to injuries and damage to the product or system components.

1. Make sure that the relevant system component is not under voltage or pressure before you assemble the product.
2. Protect the system against being restarted.

Assembling the pressure switch and connecting the pneumatics

1. Make sure that the system is not under voltage or pressure.
2. Connect the pressure switch with the pressure system:
   • Connection G1/4: MA = 12+1 Nm
   • Flange connection M5: MA = 2.5+0.5 Nm

Electrically connecting pressure switch form A
See g Fig. 10

• Only use connection cables which fulfill the required cable quality and the cable fitting diameter of 6 – 8 mm.
• Use a suitable temperature-resistant cable with ambient temperatures of > 70°C.

1. Disassemble the electrical connector.

2. Fit the connection with the screw terminals (MA = 0.4 Nm).
   The terminals are intended for cross-sections of up to 1.5 mm2.

3. Connect the protective conductor.

4. Connect the electrical connector.

5. Check that the cable fitting is mounted to the plug to ensure the IP65 protection class (MA = 1.8 Nm + 0.2 Nm).

6. Carefully mount the electrical connector to the pressure switch to ensure the IP65 protection class (MA = 0.4 Nm + 0.1 Nm).

Electrically connecting pressure switch M12x1
See g Fig. 11

• Only operate the pressure switch in an electrical circuit with safe isolation from the mains (PELV in acc. with DIN VDE 0100-410, IEC 364-4-43, HD 384.4.41 S2, EN 60079-14). The electrical circuit must be potential-free (not grounded).

INFO: The cable is not included in the scope of delivery.

Proceed as follows for connection:

1. Thread the cable onto the round plug connector.
2. Hand tighten the knurled nut on the round plug connector (audible/tactile engagement).

Suggestion for spark-quenching

DC voltage protective circuit
See g Fig. 12

• Connect the diode (G) parallel to the load (consumer) (F).
  Pay attention to the correct polarity when connecting the diode! Selection criteria for the diode: UDiode ≥ 1.4 x UMains; IDiode ≥ ILoad AC voltage protective circuit

See g Fig. 13

• Connect the RC element (E) parallel to the load (consumer) (F).

Guide value for RC selection: R [Ω] ~ 0.2 RLoad [Ω]; C [μF] ~ ILoad [A] Do not use electrolytic capacitors!

Commissioning and Operation

WARNING
Risk of injury due to uncontrolled actuator movements when the pneumatics are switched on!
There is a danger of personal injury if the system is in an undefined state.

• Put the system in a defined state before switching it on.

CAUTION
System is operating under pressure!
Incorrect installation could damage the product and cause serious injury.

• Before commissioning, check that all connections, ports and maintenance equipment have been correctly installed.

Commissioning the pressure switch

Proceed as follows to commission the pressure switch:

1. Check whether the pressure switch is mounted correctly (see sections “g 5. Assembly” and “g 2. Notes on Safety”) and make sure that all pressure switch connections are properly connected.
2. Secure the components to be switched to prevent unintentional responses, and apply voltage.
3. Apply the compressed air to the system.
4. Check that the switch outputs are functioning properly.

Setting the switching point
See g Fig. 14

Increase the switching point pressure by turning the adjustment screw (1) to the right (+). Max. torque for adjustment screw 1 Nm.

1. The adjustment screw is self-holding and also remains in the set position without any additional securing, even under unfavorable circumstances.
   Reduce the switching point pressure by turning the adjustment screw (1) to the left (–).
   Information on factory settings: see online catalog and name plate.

2. Use an external pressure gauge to check the setting value (switching point).
   INFO: The switching point is continuously adjustable, even during operation.
   The optimum selection range is when the switching point is in the middle of the switching pressure range. Optionally, a pressure gauge can be used as an aid.

Service and Repairs

Cleaning
The product must be cleaned at regular intervals.

• Do not use high-pressure cleaners for cleaning!
• Never use solvents or aggressive detergents!
• Clean the product only with a cloth slightly moistened with water or a mild detergent!

Maintenance
The product is maintenance-free. In case of technical problems, please contact one of the addresses found under www.emerson.com/contactus.

Disassembly and Exchange

CAUTION
Danger of injury if assembled under pressure or voltage!
Assembling when under pressure or electrical voltage can lead to injuries and damage to the product or system components.

1. Make sure that the relevant system component is not under voltage or pressure before you assemble the product.
2. Protect the system against being restarted.
3. Make sure that the system is not under voltage or pressure.
4. Release and remove the round plug connector.
5. Loosen the mounting screws on the pressure switch.
6. Remove the pressure switch from the pressure system.

Disposal
Dispose of the product in accordance with the national regulations in your country.

Troubleshooting

If you cannot remedy a malfunction, please contact one of the addresses found under www.emerson.com/contactus.

Response to malfunctions

• If malfunctions occur with unknown causes, exchange the pressure switch with an original pressure switch.
  The individual components of the pressure switch cannot be replaced or repaired.
  If you cannot remedy a malfunction, please contact one of the addresses found under www.emerson.com/contactus.

Technical Data

This section contains an excerpt of the key technical data. Further technical data can be found in the online catalog.

General

| Specifications
---|---
Ambient temperature min. – max| -20 – +80°C
UL application: Max. ambient tem- perature| +75°C

Pneumatics

| Specifications
---|---
Medium| Compressed air in accordance with ISO 8573-1:2010, (max. particle size: 40 µm; medium dew point: ≤ 3°C; oil content: max. 40 mg/m3) hydraulic oil
Operating pressure range| -0.9 – 0 bar / -0.9 – 3 bar / 0.2 – 16 bar

Electrics

| Specifications
---|---
Operating voltage min. – max., form A| 12 V – 125 V DC; 12 V – 250 V AC
Operating voltage min. – max., M12x1| 12 V – 30 V DC/V AC

Switching capacity

Switching voltage [V AC]

| | | 30| 48| 60| 125| 250
Type| Current type| Load type| Max. switching current [A] 1)
Form A| AC| Resistive load| 5| 5| 5| 5| 5
| | Inductive load 2)| 3| 3| 3| 3| 3
| DC| Resistive load| 3| 1.2| 0.8| 0.4|
| | Inductive load 2)| 2| 0.55| 0.4| 0.05|
M12x1| AC| Resistive load| 4| | | |
| | Inductive load 2)| 3| | | |
| DC| Resistive load| 3| | | |
| | Inductive load 2)| 2| | | |

1. Reference cycle: 30/min., reference temperature: +30°C, M12x1, U = 30 V
2. Inductive load: AC = cos ~ 0.7°; DC = L/R ~ 10 ms
   Electrical nominal values according to UL 508 and CSA C22.2 NO.

14-18

Type| Maximum switching current| Wiring

in the field with ca-

ble Ø 6 – 8 mm

| Tightening torque [Nm]
---|---|---|---
Form A| 5 A, 250 V AC, BP| 20-14 AWG ctrl.| 0.4
M12x1| 4 A, 30 V AC, BP| –| –

Import into the United Kingdom is done by:

Emerson Automation
Fluid Control & Pneumatics UK Ltd
2 Pit Hey Place, West Pimbo
Skelmersdale | WN8 9PG
United Kingdom

Emerson Automation Solutions
AVENTICS GmbH
Ulmer Straße 4
30880 Laatzen, GERMANY
phone +49 511 2136-0
fax +49 511 2136-269
www.emerson.com/aventics
aventics@emerson.com

The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The given information does not release the user from the obligation of own judgement and verification.

It must be remembered that our products are subject to a natural process of wear and aging.

An example configuration is depicted on the title page. The delivered product may thus vary from that in the illustration.

Translation of the original operating instructions. The original operating instructions were created in the German language.

Subject to modifications. © All rights reserved by AVENTICS GmbH, even and especially in cases of proprietary rights applications. This document may not be reproduced or given to third parties without our consent.

The Emerson logo is a trademark and service mark of Emerson Electric Co. AVENTICS is a mark of one of the Emerson Automation Solutions family of business units. All other marks are property of their respective owners.

References

• AVENTICS – Smart, reliable solutions for pneumatic automation | Emerson US
• Contact Us | Emerson US
• Contact Us | Emerson US

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