Omron EJ1 User Manual

Modular Temperature Controller
EJ1
In-panel Temperature Controller with Flexible Modular
Design and Wide Integration with Host Devices
• The compact modular structure enables construction of temperature
systems optimally suited to the application.
• Connection can be made to a Programmable Controller without any
programming required, reducing the number of steps required in ladder
programming design.
• One fully multi-input Unit includes a thermocouple, platinum-resistance
thermometer, and analog input for easy selection and reduced inventory
requirements.
• Connect directly to the G3ZA Multi-channel Power Controller using optimum
cycle control for high-accuracy regulation with minimal noise.
• Up to 16 Temperature Controllers can be connected to a single DeviceNet
Communications Unit.
• All of the parameters for the Temperature Controllers connected to the
DeviceNet Communications Unit can be uploaded or downloaded in one
operation.
Ordering Information
■ Temperature Controller
Standard Control Models
Name Power No. of Control
supply control outputs
voltage points 1 and 2
Basic Unit 24 VDC 2 Voltage
(temperature supplied output:
control) from the 2 points (for
(See note 1.) End Unit SSR drive)
4
(See note 2.)
2 Current
output:
2 points
HFU None None
(See note 1.)
End Unit 24 VDC
(See note 1.)
Note: 1. An End Unit is always required for connection to a Basic Unit or an HFU. An HFU cannot operate without a Basic Unit. External communications cannot be performed when using a
Basic Unit only.
2. For heating/cooling control applications, control outputs 3 and 4 on the 2-point models are used for the cooling or heating control outputs.
On the 4-point models, heating/cooling control is performed for the two input points.
3. When using the heater burnout alarm, purchase a Current Transformer (E54-CT1 or E54-CT3) separately.
Functional Upgrades
Refer to page 17 for details.
Upgrade functions are marked with "V1.1".
Refer to the following manual for precautionary information and other information necessary to use the EJ1:
EJ1 Modular Temperature Controller User's Manual (Cat. No. H142)
Control Auxiliary Functions
outputs output
Heater
3 and 4
burnout
alarm
Transistor None 2
output: 2 points (See
(sinking) note 3.)
Voltage output: None
2 points (for
SSR drive)
(See note 2.)
Transistor
output: 2 points
(sinking)
None Transistor output:
4 points (sinking)
None
Transistor output:
2 points (sinking)
Supports DeviceNet Communications.
Refer to the Safety Precautions on page 20.
Communications Input type
functions
Event
inputs
2 G3ZA connection Thermocouple,
port: RS-485 platinum
resistance
From End Unit:
thermometer,
Port A or port B:
None
analog voltage,
RS-485
and analog
current
selectable for
each channel.
2
4 Port C: RS-485 or No input
RS-232C
selectable.
From End Unit:
Port A: RS-485
Port C: RS-422
From End Unit:
Port A: RS-485
None DeviceNet
communications
None Port A or B: RS-485
Connector: Port A
Modular Temperature Controller
Terminal Model
M3 terminal EJ1N-TC2A-QNHB
Screw-less clamp EJ1N-TC2B-QNHB
M3 terminal EJ1N-TC4A-QQ
Screw-less clamp EJ1N-TC4B-QQ
M3 terminal EJ1N-TC2A-CNB
Screw-less clamp EJ1N-TC2B-CNB
M3 terminal EJ1N-HFUA-NFLK
Screw-less clamp
EJ1N-HFUB-NFLK
M3 terminal EJ1N-HFUA-NFL2
Screw-less clamp
EJ1N-HFUB-NFL2
Screw-less clamp
EJ1N-HFUB-DRT
M3 terminal EJ1C-EDUA-NFLK
Detachable
EJ1C-EDUC-NFLK
connector
EJ1
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