Omron EJ1 User Manual

6
I/O Configuration and Main Functions Section 1-2
EDU: End Unit
Note Auxiliary outputs are output via an internal bus.
1-2-2 Main Unit Functions
Basic Units (TC4 and
TC2)
• The Basic Units are modular temperature controllers with I/O.
• There are two models of Basic Unit: The TC4 with four I/O channels and
the TC2 with two I/O channels.
• Up to eight G3ZA Multi-channel Power Controllers can be connected to
one Basic Unit.
TC4 • One TC4 Unit controls temperature on 4 channels.
• Multi-input is supported for thermocouple, platinum resistance thermome-
ter, or analog input.
• The type of input can be set separately for each channel.
• Control outputs are pulse voltage outputs.
• Both screw terminals and screw-less clamp terminals are available.
• Terminal blocks can be detached and attached.
TC2 • One TC2 Unit controls temperature on 2 channels.
• Multi-input is supported for thermocouple, platinum resistance thermome-
ter, or analog input.
• The type of input can be set separately for each channel.
• Control outputs are pulse voltage outputs.
• Connect a current transformer (CT) to use the heater burnout and heater
overcurrent alarms.
• There are two event inputs. Any of the following can be used by setting
event input assignments: Run/stop, auto/manual, remote SP/local SP, and
bank switching.
• Both screw terminals and screw-less clamp terminals are available.
• Terminal blocks can be detached and attached.
Advanced Unit (HFU) • An HFU monitors the Basic Units and collects data.
• Up to sixteen Basic Units can be connected to one HFU.
• Data can be exchanged between the EJ1 and PLCs using programless
communications.
• Up to 300 data items can be read from a PLC to the EJ1 and up to 300
data items can be written from the EJ1 to a PLC.
• OMRON CS/CJ-series PLCs and Mitsubishi Q/QnAS-series PLCs can be
connected.
End Unit (EDU) • The End Unit supplies power to connected Basic Units and HFUs.
• An End Unit is always required when using the EJ1.
• A total of up to 16 HFUs and Basic Units can be connected to one End
Unit.
Adjacent Unit
Port A communications
Port B communications
Auxiliary output 1 (See note.)
Auxiliary output 2 (See note.)

Omron EJ1 Specifications

General

Brand	Omron
Model	EJ1
Category	Temperature Controller
Language	English