Omron WIRED REMOTE I-O System Manual page 73

Mounting and Wiring Precautions
C500 Remote I/O Units
C200H Remote I/O Units
1, 2, 3...
A Master and a Slave cannot be mounted to the same Rack
C500 Master
C500 Slave
A CPU Rack cannot be connected directly to a Slave Rack; i.e., any Slave
Rack containing a Slave must be connected through the Slave. An Expan-
sion I/O Rack cannot be connected to a Slave Rack.
CPU Rack
Slave Rack
Expansion
I/O Rack
1. Do not mount the C200H Master to either of the rightmost two slots on
the CPU Rack. Doing so will prevent mounting devices directly to the
CPU Unit.
2. Do not mount the C200H Master to a Slave Rack or to an Expansion I/O
Rack connected to a Slave Rack.
3. Slaves must be connected directly to the Master or another Slave. Do
not connect the Slave Rack with I/O Connecting Cable.
4. Special I/O Units cannot be used on C200H Slave Rack connected to
any Master other than a C200H Master.
C500 Expansion
I/O Rack
C500 Slave
C500 Slave
Section 5-4
63