Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 213)

Section 4C
Connecting the 4-axis Servo Module
4C-15
Table 4C.B lists the servo module input specifications.
Table 4C.B
Servo Module Input Specifications
Item Specification Remark
Input Power Range for Encoders +5V (+10%, -1%)
+15V (± 7%)
From Main Power Supply
Maximum Input Frequency of
Encoder Feedback
2MHz Maximum Cable Length Specified
Desired Voltage Range of
Encoder Battery Backup
3.5V to 4.5V ______
Table 4C.C lists the servo module output specifications.
Table 4C.C
Servo Module Output Specifications
Item Specification Remark
PWM Output
(8520 digital only)
PWM Frequency Approx. 2.0 KHz
(8520 digital only)
PWM Signal Type RS-422-A
Comutated Output
(1394 digital only)
Comutated Signal
IA and IB
Approx. 1000 Hz ( ± 12 bits)
DAC Output Output Voltage Range ± 10V
Resolution 2.44mV ( ± 12 bits)
Sampling Frequency 1000 Hz
Output Current 5mA Max.
Load Capacitance 0.01 m F Max.
4C.5.2
8520-ENC4 Servo Module
Specifications