Rockwell Automation 1747-L55x,D174710.4 SLC 500 Ethernet - Manual (Page 61)

5–17 Using RS232-to-Ethernet
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Channel-to-Channel Passthru
Publication 1747-10.4
SLC 5/05 # 2 Using Ethernet
For DH485-to-Ethernet passthru, SLC 5/05 #2 is the receiver and
does not require message ladder logic, only a correct IP address and
proper channel configuration.
For Ethernet-to-DH485 passthru, SLC 5/05 #2 is the initiator and
must have ladder logic to send a message to SLC 5/03 via the SLC
5/05 #1 bridge.
The SLC 5/05 remote message ladder logic, message setup, and
channel configurations are shown below.
SLC 5/05 #2 Ladder Logic