68 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Chapter 4 Communication Connections
Single Cable Connection
When connecting a single cable to the DH-485 connector, use Figure 49.
Figure 49 - Single Cable Connection
Multiple Cable Connection
When connecting multiple cables to the DH-485 connector, use Figure 50.
Figure 50 - Multiple Cable Connection
Ground and Terminate the DH-485 Network
Only one connector at the end of the link must have Terminals 1 and 2
jumpered together. This provides an earth ground connection for the shield of
the communication cable.
Both ends of the network must have Terminals 5 and 6 jumpered together, as
shown in Figure 51 on page 69
. This connects the termination impedance (of
120 ohm) that is built into each AIC+ or the 1763-NC01 cable as required by the
DH-485 specification.
Connections using Belden #3106A Cable
For this Wire/Pair Connect this Wire To this Terminal
Shield/drain Non-jacketed Terminal 2 – Shield
Blue Blue Terminal 3 – (Common)
White/orange
White with Orange Stripe Terminal 4 – (Data B)
Orange with White Stripe Terminal 5 – (Data A)
Connections using Belden #9842 Cable
For this Wire/Pair Connect this Wire To this Terminal
Shield/drain Non-jacketed Terminal 2 – Shield
Blue/white
White with blue stripe
Cut back – no connection
(1)
(1) To prevent confusion when installing the communication cable, cut back the white with blue stripe wire immediately after the
insulation jacket is removed. This wire is not used by DH-485.
Blue with white stripe Terminal 3 – (Common)
White/orange
White with orange stripe Terminal 4 – (Data B)
Orange with white stripe Terminal 5 – (Data A)
Orange with white stripes
Blue (#3106A) or
Blue with white
stripes (#9842)
Shrink tubing recommended
White with orange stripes
6 Termination
5 A
4 B
3 Common
2 Shield
1 Chassis ground
Drain wire
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