Connection Precautions - Omron EJ1G User Manual

Unit Configuration Examples
2-4-1

Connection Precautions

Restrictions on the Number of Units that Can Be Connected
Precautions When Using
an HFU
• Unit numbers 0 to 31 can be used for EJ1G-HFU and EJ1G-TC4/TC2
Units.
• Up to 16 Units, including the HFU, can be connected side by side. (EDU
Units are not counted in the number of Units that can be connected.)
• One HFU can control up to 16 TC4/TC2 Units.
• The unit numbers of the TC4/TC2 Units can be set to between 0 and 31.
• To connect 16 TC4/TC2 Units, Communications Cables must be used to
distribute Unit positioning because the maximum number of Units that can
be connected horizontally will be exceeded.
• When using Communications Cables to distribute TC4/TC2 Unit position-
ing, connect the cables to port B on the End Units.
• If distributed positioning is used for an EJ1G, power must be supplied
separately to the terminal block on the End Units.
Note When using distributed positioning, turn ON power to the distributed Units first
or turn ON power to the HFU and distributed Units simultaneously. Even if this
is done, there may still be problems with the startup timing depending on the
EJ1G configuration and power supply capacity. If problems occur at startup,
increase the delay between turning ON the power to the distributed Units and
the HFU.
One HFU can manage up to 16 TC Units (4 channels
EDU Units are not included in the number of Units that can be managed.
EJ1G-HFU
Up to 16 Units can be connected side by side.
EDU Units are not counted in the number of Units that can be connected.
EJ1C-EDU
EJ1G-TC4
or
EJ1G-TC2
Section 2-4
16 Units = 64 channels)
Turn ON
pin 8 on
SW2.
EJ1G-TC4
EJ1C-EDU
or
EJ1G-TC2
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