Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 80)

Publication GMC-RM001A-EN-P — July 2001
9-4 High Speed Registration Inputs
Dedicated Power Supply
In the figure below, the registration input has a dedicated linear
power supply.
Figure 9.3
Dedicated registration power supply
Detection Device Mounting
A line driver or push-pull output is preferred, but not widely available
except in specialized photoelectric sensors for mark detection.
Ideally, the device body should be insulated from the machine
structure and connected to the cable shield.
If the sensor cannot be insulated, ground the shield to the structure or
sensor mounting.
+
24V dc Linear PSU
Segregation Filter
Dirty Zone
Clean Zone
Keep short or shield
(ground shield on both ends)
Insulated mounting (preferred)
Registration Input
Detector
com
AC