Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set User Manual
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11278-I
Section 4B
Connecting the 3-axis Servo Module
4B-9
CN5, CN6, and CN7 for Absolute and Incremental Encoder Connectors
The digital servo module receives feedback from the feedback devices
(absolute or incremental encoders) of the servo motors or spindle through
connectors CN5, CN6, and CN7. Figure 4B.7 shows an end view of
connectors CN5, CN6, and CN7 and lists the pin assignments of this
connector when it is used with absolute encoders.
Figure 4B.7
Absolute Encoder Connections and Pin Assignments of Connectors
CN5, CN6, CN7, 20 pin female, Honda MR-20RFD2
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 +15V Encoder Power
Feedback Device
6
ENC_15V +15V Encoder Power
Feedback Device
7
BAT_+
Battery Power Supply
Feedback Device
8-11
N.C.
12
Reset
Used for Reset Operation Only
Feedback Device
13
N.C.
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
Servo Module
ATTENTION: Reversing the polarity of the absolute encoder
battery power supply can destroy some elements of the absolute
encoder.