Rockwell Automation 1771-DE Absolute Encoder Module User Manual - Manual (Page 20)

Configuring and Installing Your Module
Chapter 3
3Ć8
We recommend the following Belden cable or its equivalent to connect
the encoder to the module (maximum 50 feet). Use extra twisted pairs to
connect power to the encoder.
No. of No. of Twisted Belden Cable No.
Encoder Bits Pairs in Cable 18 AWG 20 AWG
8 9 9775 9875
10 11 Ć 9876
Ć 12 9776 9877
12 15 9777 9879
Important: Tighten wiring arm connections to 9 inch-pounds of torque.
WARNING: Do not remove the wiring-arm from an
operating module; it will cause the power-up bit status to
change unpredictably until a valid write to the module occurs.
If swing-arm power is lost, turn on the power-up bit and disable
all outputs until a valid write occurs.
Connecting a SingleĆended Output Encoder
Us e Figure 3.6 to connect a single-ended output encoder. Connect the
signal line for bit 0 to terminal 1 of the left wiring arm. Connect its return
to terminal 2. Connect bit 1 signal line to terminal 3 and its return to
terminal 4. Continue in this way for all encoder channels.
If the encoder has less than 12 signal bits, jumper the unused input
terminals. For example, if you are using a 10-bit encoder, jumper
terminals 19 and 20 and terminals 17 and 18 on the right wiring arm.
WiringĆArm Connections