Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 63)

Installing the Assembly
Chapter 6
6Ć13
2. Connect the minus side to terminal 12 and to ground at the I/O
chassis.
3. Connect the shields of the two cable segments if you use the same
supply to power the encoder.
4. Connect the shield to ground at the I/O chassis end.
5. Connect the power-supply chassis to ground.
Connecting Hardware Stop
Before you connect to the hardware stop input, you should first consider
overall power distribution, including the master-control relay and
loop-contactor relay (Figure 6.8). Connect a suppression network across
each relay coil.