OMRON EJ1 Modular Temperature Controller Instruction Manual
- June 9, 2024
- Omron
Table of Contents
EJ1 Temperature controller
Instruction Manual
EJ1 Modular Temperature Controller
Thank you for purchasing the OMRON Product. To ensure the safe application of
the Product, only a professional with an understanding of electricity and
electric devices must handle it. Read this manual carefully before using the
Product and always keep it close at hand when the Product is in use.
OMRON CORPORATION ©All Rights Reserved EJ24 5724833-0A (Side-A)
For detailed operating instructions, please refer to the EJ1 Modular.
Temperature Controller User’s Manual (Cat. No. H142).
Safety Precautions
-
Key to Warning Symbols
CAUTION
Indicates a potentially hazardous situation which, if not avoided, is likely to result in minor or moderate injury or property damage. Read this manual CAUTION arefully
before using the product. -
Warning Symbols
CAUTION
Do not touch the terminals while power is being supplied. Doing so may
occasionally result in minor injury due to electric shock.|
---|---
Use a power supply that complies with the reinforced insulation specified in
IEC 60664 for the EJ1 external power supply or the power supply connected to
the EJ1. If non-compliant power supplies are used, electric shock may
occasionally result in minor injury.
Do not allow pieces of metal, wire clippings, or fine metallic shavings or
filings from installation to enter the product. Doing so may occasionally
result in electric shock, fire, or malfunction.|
Do not use the product where subject to flammable or explosive gas. Otherwise,
minor injury from explosion may occasionally occur.
Never disassemble, modify, or repair the product or touch any of the internal
parts. Minor electric shock, fire, or malfunction may occasionally occur.
Set the parameters of the product so that they are suitable for the system
being controlled. If they are not suitable, unexpected operation may
occasionally result in property damage or accidents.|
Provide safety measures in external circuits (i.e., not in the Temperature
Controller) to ensure safety in the system if an abnormality occurs due to
malfunction or due to external factors. Not doing so may result in serious
accidents due to incorrect operation.
• Emergency stop circuits, interlock circuits, limit circuits, and similar
safety measures must be provided in external control circuits.
• Provide measures in the communications system and programming to ensure
safety in the overall system even if errors or malfunctions occur in serial
communications, remote I/O communications, or other communications.
• You must take fail-safe measures to ensure safety in the event of incorrect,
missing, or abnormal signals caused by broken signal lines, momentary power
interruptions, or other causes.|
Tighten the terminal screws to between 0.5 and 0.6 N·m. Loose screws may
occasionally result in fire.
A malfunction in the product may occasionally make control operations
impossible or prevent alarm outputs, resulting in property damage. To maintain
safety in the event of malfunction of the product, take appropriate safety
measures, such as installing a monitoring device on a separate line.
Always consider the application conditions and use the product within the
rated load. If the product is used past its life expectancy, burning may
occasionally occur.| **
CAUTION* – Risk of Fire and Electric Shock
a) This is the product UL Recognition as Open Type Process Control Equipment.
It must be mounted in an enclosure that does not allow fire to escape
externally.
b) More than one disconnect switch may be required to de-energize the
equipment before servicing.
c) Signal inputs are SELV, limited energy.
d) Caution: To reduce the risk of fire or electric shock, do not interconnect
the outputs of different Class 2 circuits.1
*1 A class 2 circuit is one tested and certified by UL as having the current and voltage of the secondary output restricted to specific levels.
Conformance to UL/CSA
Do not allow temporary overvoltage on the primary circuit to exceed the
following values.
Check the power supply voltage to the Temperature Controller.
Short-term overvoltage: 1,200 V + (Power supply voltage)
Long-term overvoltage: 250 V + (Power supply voltage)
The power supply terminals must be supplied from a SELV, limited-current
source. A SELV (safety extra-low voltage) source is a power supply having
double or reinforced insulation between the primary and the secondary circuits
and having an output voltage of 30 V r.m.s. max. and 42.4 V peak max. or 60 V
DC max.
Functional insulation is provided between the power supply, input, output, and
communications terminals. If reinforced or double insulation is required, use
a power supply that complies with the reinforced or double insulation
standards specified in IEC 60664 for the EJ1 external power supply and for the
power supply connected to the EJ1.
Always externally connect the recommended fuse that is specified in the
Instruction Manual before you use the Temperature Controller.
Analog Input
- If you input an analog voltage or current, set the Input Type parameter to the correct input type.
- Do not use the Temperature Controller to measure a circuit with Measurement Category II, III, or IV.
- Do not use the Temperature Controller to measure an energized circuit to which a voltage that
exceeds 30 V r.m.s. or 60 V DC is applied.
The protection provided by the Temperature Controller may be impaired if the
Temperature Controller is used in a manner that is not specified by the
manufacturer.
Due to UL Listing requirements, use the E54-CT1L or E54-CT3L current
transformer with the factory wiring (internal wiring). Use a UL category XOBA
or XOBA7 current transformer that is UL Listed for field wiring (external
wiring) and not the factory wiring (internal wiring).
Conformance to EU Directives and UK legislations
This is a class A product. In residential environment areas it may cause radio interference, in which case the user may be required to take adequate measures to reduce interference.
Precautions for Safe Use
-
The product is designed for indoor use only. Do not use the product outdoors or in any of the following locations.
• Places directly subject to heat radiated from heating equipment.
• Places subject to splashing liquid or oil atmosphere.
• Places subject to direct sunlight.
• Places subject to dust or corrosive gas (in particular, sulfide gas or ammonia gas).
• Places subject to intense temperature change.
• Places subject to icing or condensation.
• Places subject to vibration or strong shocks. -
Use and store the product within the rated temperature and humidity ranges. Provide forced-cooling if required.
-
Do not block the ventilation holes on the product. Internal temperature rise may result in a shorter product service life.
-
Be sure to wire properly with correct polarity of terminals.
-
Use the wire sizes and stripping lengths given in the following table to prevent smoking and firing of the wiring material.
Terminal type| Recommended wires| Stripping length
---|---|---
Screw Terminals 1| •Basic Unit AWG24 to AWG18 (equal to cross-sectional area of 0.205 to 0.823 mm2)
•End Unit AWG24 to AWG16 (equal to cross-sectional area of 0.205 to 1.309 mm2)| 6 to 8 mm
Screw-Less Clamp
Terminals 2| AWG24 to AWG16 (0.25 to 1.5 mm2)
Copper stranded or solid wires| 8 mm
Screw Connector
Terminals *3| AWG24 to AWG14 (equal to cross-sectional area of 0.205 to 2.081 mm2)| –
1 You can connect up to two wires of the same size and type, or two crimped terminals using M3, width 5.8 mm or less to a single terminal.
2 You can connect only one wire to each terminal.
*3 You can connect up to two wires of the same size and type to a single terminal.
-
Do not connect anything to unused terminals.
-
To reduce inductive noise, keep the wiring for the product’s terminal block away from power cables carrying high voltages or large currents. Also, do not wire power lines together with or parallel to product wiring. Using shielded cables and using separate conduits or ducts is recommended.
-
Attach a surge suppressor or noise filter to peripheral devices that generate noise (in particular, motors, transformers, solenoids, magnetic coils or other equipment that have an inductance component).
-
Allow as much space as possible between the product and devices that generate powerful high frequencies (high-frequency welders, high-frequency sewing machines, etc.) or surge.
-
Allow as much space as possible between the Temperature Controller and devices that generate powerful high frequencies (high-frequency welders, high-frequency sewing machines, etc.) or surge.
-
Use the product within the rated load and power supply.
-
Make sure that the rated voltage is attained within two seconds of turning ON the power using a switch or relay contact. If the voltage is applied gradually, the power may not be reset or output malfunctions may occur.
-
Make sure that the product has 30 minutes or more to warm up after turning ON the power before starting actual control operations to ensure the correct temperature display.
-
When executing self-tuning, turn ON power for the load (e.g., heater) at the same time as or before supplying power to the Temperature Controller. If power is turned ON for the Temperature Controller before turning ON power for the load, self-tuning will not be performed properly and optimum control will not be achieved.
-
The switch or circuit breaker must be within easy reach of the operator, and must be marked as a disconnecting means for this unit.
-
Do not use paint thinner or similar chemical to clean with. Use standard grade alcohol.
-
Design the system (e.g., the control panel) allowing leeway for the delay required before
product outputs are valid after turning ON power to the product. -
The number of non-volatile memory write operations is limited. Therefore, use RAM write mode when frequently overwriting data, e.g., through communications.
-
Never touch the electronic components, connectors, or patterns on product boards with your bare hands. Always hold the product by the case. Inappropriately handling the product may occassionally damage internal components due to static electricity.
-
Use suitable tools when taking the Temperature Controller apart for disposal. Sharp parts inside the Digital Controller may cause injury.
-
Do not exceed the communications distance that is given in the specifications and use the specified communications cable.
-
Do not turn the power supply to the Temperature Controller ON or OFF while the USB-Serial
Conversion Cable is connected. The Temperature Controller may malfunction. -
Do not bend the wiring cables past their natural bending radius. Do not pull on the wiring cables.
-
Mount the product to a DIN Rail mounted vertically to the ground.
-
Use a switch, relay, or other device with contacts to turn OFF the power supply quickly.
Gradually lowering the voltage of the power supply may result in incorrect outputs or memory errors. -
Do not touch the electronic components with your hands or subject them to shock when removing the terminal block.
-
Connect only the specified number of products in only a specified configuration.
-
Always turn OFF the power supply before wiring the product, replacing the product, or changing the product configuration.
-
Attach the enclosed cover seal to the connector opening on the left end product during installation.
-
Do not use port B on the End Units when using port C on Advanced Units.
-
Be sure to use the external fuse with the appropriate fusing characteristics, and the breaker with the appropriate tripping characteristics to ensure that the fuse does not melt and the breaker is not activated due to the inrush current. Be particularly careful when N units are linked together, the inrush current will be equal to N times that for one unit.
-
Do not use the port A connector and port A terminal of the End Unit at the same time.
-
Do not connect or disconnect the Conversion Cable or USB-Serial Conversion Cable while communications are in progress. the product faults or malfunction may occur.
-
Make sure that the metal components of the product are not touching the external power terminals.
-
Do not leave the Conversion Cable or the USB-Serial Conversion Cable connected constantly to the equipment. Noise may enter on the Conversion Cable or USB-Serial
Conversion Cable, possibly causing equipment malfunctions. -
Observe the following precautions when you wire the product models with screwless clamp terminal blocks.
• Follow the procedures given in EJ1 Modular Temperature Controllers User’s Manual (Cat. No. H142)
• Do not wire anything to the operating holes.
• Do not tilt or twist a flat-blade screwdriver while it is inserted into a operating hole on the terminal block. The terminal block may be damaged.
• Insert a flat-blade screwdriver straight into the operating holes. The terminal block may be damaged if you insert the screwdriver at an angle.
• Do not allow the flat-blade screwdriver to fall out while it is inserted into a operating hole. -
Use wires with heat resistance of 75°C min to wire the terminals because the maximum terminal temperature is 75°C.
-
Install the product only after reading the manual provided with the End Unit.
SUITABILITY FOR USE
Omron Companies shall not be responsible for conformity with any standards,
codes or regulations which apply to the combination of the Product in the
Buyer’s application or use of the Product. At Buyer’s request, Omron will
provide applicable third party certification documents identifying ratings and
limitations of use which apply to the Product. This information by itself is
not sufficient for a complete determination of the suitability of the Product
in combination with the end product, machine, system, or other application or
use. Buyer shall be solely responsible for determining appropriateness of the
particular Product with respect to Buyer’s application, product or system.
Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE
HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS
PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT
OR SYSTEM.
OMRON Corporation Industrial Automation Company
Kyoto, JAPAN
Contact:www.ia.omron.com
Regional Headquarters
OMRON EUROPE B.V.
Wegalaan 67-69,2132 JD Hoofddorp
The Netherlands
Tel: (31)2356-81-300
Fax: (31)2356-81-388
OMRON ASIA PACIFIC PTE. LTD.
No. 438A Alexandra Road #05-05/08
(Lobby 2), Alexandra Technopark, Singapore 119967
Tel: (65) 6835-3011
Fax: (65) 6835-2711
OMRON ELECTRONICS LLC
2895 Greenspoint Parkway, Suite 200
Hoffman Estates, IL 60169 U.S.A.
Tel: (1) 847-843-7900
Fax: (1) 847-843-7787
OMRON (CHINA) CO., LTD.
Room 2211, Bank of China Tower,
200 Yin Cheng Zhong Road,
Pu Dong New Area, Shanghai,
200120, China
Tel: (86) 21-5037-2222
Fax: (86) 21-5037-2200
Note: Specifications subject to change without notice.
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