Multiple cable connection, Grounding and terminating the dh-485 network – Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual User Manual
Page 89

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014
75
Communication Connections Chapter 4
Multiple Cable Connection
When connecting multiple cables to the DH-485 connector, use the following
diagram.
Grounding and Terminating 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 below. 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)
to Next Device
to Previous Device