Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set User Manual
Page 156

Section 4B
Connecting the 3-axis Servo Module
4B-10
Table 4B.B lists the pin assignments of this connector when it used with
incremental encoders.
Table 4B.B
CN5, CN6, and CN7 Incremental Encoder Pin Assignments
Pin No.
Signal
Description
True Level
Signal Destination
1
GND
Encoder Power Return
Feedback Device
2
GND
Encoder Power Return
Feedback Device
3
ENC_5V
Switched +5V Encoder Power Supply
Feedback Device
4
ENC_5V
+5V Encoder Power
Feedback Device
5
ENC_15V
Spindle Encoder +15V Power Supply
Feedback Device
6
ENC_15V
+15V Encoder Power
Feedback Device
7
N.C.
8
PU
Pole Sensor output Phase_U, 0
°
High
Servo Module
9
/PU
Diff. Signal
Low
Servo Module
10
PV
Pole Sensor output Phase_V, 120
°
High
Servo Module
11
/PV
Diff. Signal
Low
Servo Module
12
PW
Pole Sensor output Phase_W, 240
°
High
Servo Module
13
/PW
Diff. Signal
Low
Servo Module
14
PZ
Phase_Z, 1 pulse per rev.
High
Servo Module
15
/PZ
Diff. Signal
Low
Servo Module
16
PA
Phase_A, 2-phase pulse
High
Servo Module
17
/PA
Diff. Signal
Low
Servo Module
18
PB
Phase_B, 2-phase pulse
High
Servo Module
19
/PB
Diff. Signal
Low
Servo Module
20
Shield
Chassis Ground
Feedback Device
The encoder marker signal is sent to the control on the Phase_Z pins
(#14 and #15).
Important: If a spindle incorporates an encoder to supply position
feedback to the digital servo module, the spindle encoder must be
interfaced with the last open connector of these 3 connectors. Refer to the
AMP reference manual for additional information on digital servo board
configuration.
Pins 8 through 13 of connectors CN5, CN6, and CN7 are used for motor
phasing only. When using connectors CN5, CN6, or CN7 for spindle
feedback, pins 7 through 13 are not connected (N.C.).