Installation - Omron EJ1 User Manual

■ Precautions for Correct Use

Installation

1. Do not connect the End Unit directly to an HFU.
2. Connect the End Unit to the right side of a Basic Unit.
3. Connect the HFU to the left side of the Basic Units.
4. Connection is not possible to CJ1-series PLCs.
5. Use the EJ1G-@@ for gradient temperature control. When not
using gradient temperature control, use the EJ1N-@@.
6. When removing the terminal block to replace a Unit, be sure that
the new Unit is the same as the Unit that is being replaced.
Service Life
1. Use the product within the following temperature and humidity
ranges:
Temperature: − 10°C to 55°C (with no condensation or icing)
Humidity: 25% to 85%
When the Temperature Controller is incorporated in a control
panel, make sure that the controller's ambient temperature and
not the panel's ambient temperature does not exceed 55°C.
2. The service life of electronic devices like Temperature Controllers
is determined not only by the number of times the relay is
switched but also by the service life of internal electronic
components. Component service life is affected by the ambient
temperature: the higher the temperature, the shorter the service
life and the lower the temperature, the longer the service life.
Therefore, the service life can be extended by lowering the
temperature of the Temperature Controller.
3. Mounting two or more Temperature Controllers side by side, or
mounting Temperature Controllers above each other may cause
heat to build up inside the Temperature Controllers, which will
shorten their service life. If the Temperature Controllers are
mounted above each other or side by side, use forced cooling by
fans or other means of air ventilation to cool down the
Temperature Controllers.
However, be sure not to cool only the terminals. Doing so will
result in measurement errors.
Ensuring Measurement Accuracy
1. When extending or connecting the thermocouple lead wire, be
sure to use compensating wires that match the thermocouple
types.
2. When extending or connecting the lead wire of the platinum
resistance thermometer, be sure to use wires that have low
resistance and keep the resistance of the three lead wires the
same.
3. Mount the Temperature Controller so that it is horizontally level.
4. If the measurement accuracy is low, check to see if input shift has
been set correctly.
Precautions for Operation
1. A certain amount of time is required for the outputs to turn ON
from the time the power supply is turned ON. Due consideration
must be given to this time when incorporating Temperature
Controllers in a sequence circuit.
2. It takes 30 minutes from the time the Temperature Controller is
turned ON until the current temperature is displayed. Always turns
ON the power supply at least 30 minutes before starting
temperature control.
3. Avoid using the Temperature Controller near a radio, television
set, or other wireless device. Its use would result in reception
disturbance.
Wiring Screw-Less Clamp Terminals
There are two holes for each terminal. The
hole on the right is the operation hole and
B1 the hole on the left is the wire hole.
A1
B2 Insert a flat-blade screwdriver with a width of
A2
2.5 mm into the operation hole, insert the
B3
wire into the wire hole, and then remove the
A3
B4
screwdriver. The wire will be clamped.
A4
B5
Use crimp terminals that are suitable for the
A5
cross-sectional area of the wire.
B6
A6
Recommended crimp terminals:
B7
A7 Weidmuller H-sleeve series
B8
A8
B9
B10
A9
A10
Installation
Connecting Units
1. Align the connectors and connect the Units to each other.
Connect an End Unit to the Unit on the right end.
Note: 1. Do not connect the End Unit directly to an HFU.
2. Connect the End Unit to the right side of a Basic Unit.
2. Slide the yellow sliders on the top and bottom of the Units until
they click into place.
Slider
3. Attach the cover seal to the connector opening on the Unit on the
left end of the EJ1.
Cover Seal
Modular Temperature Controller
Lock
EJ1
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