Brooks recommendeds that the encoder cable be shielded and contain four twisted pairs with a gauge of AWG 24 or AWG 26. See Table 38-134 for recommended cables.
NOTE: Unshielded non-twisted pair encoder wiring should never be run next to unshielded motor wiring or other sources of noise.
| Alpha 24 AWG | Alpha 26 AWG | Beldon 24 AWG | Beldon 26 AWG | |
|---|---|---|---|---|
|
High Flex |
86604CY |
86504CY |
|
|
|
No Flex |
5494C |
|
88104 |
|
One of the twisted pairs should be used for power and ground, one pair for A+ & A-, one pair for B+ & B- and one pair for Z+ & Z-. (See the next section for specific pin assignments.) Connect the shield to pin 7 on the MIDS encoder connector. On some encoders that are in a metal box with a metal shell connector, on the encoder end of the cable, connect the shield to the metal shell of the mating connector.