Rockwell Automation 1746-HSRV SLC Servo Control Module User Manual - Manual (Page 49)

Publication 1746-6.1.2 - July 2000
5-6 Wiring the SLC Servo Module
backplane input. Though the exact position of home is not important,
it is important that the home position is:
•
A repeatable resting place for the axis when it is not used.
•
Free of obstruction from another moving axis.
To connect a home limit switch:
1. Place the limit switch near the home position that you want.
2. Adjust the encoder so that the marker is approximately 1/2
revolution from the limit switch closure.
Wiring Estop Connections The SLC Servo Module detects and controls Estop conditions. Each
SLC Servo Module has a separate and independent Estop circuit. Refer
to the documentation that came with your drive for recommendations
on correctly wiring your external Estop string.
A hardware Estop is caused by the following:
•
Broken wire in the user power cable.
•
Power-fail signal from chassis backplane.
•
Watch-dog time-out on SLC Servo Module.
•
Software Estop conditions.
•
A contact in the external Estop string or a broken/missing wire
opens the string (e.g., when someone pushes the Estop push
button).
Specifications for Estop relay on the SLC Servo Module appear in the
table below.
IMPORTANT
If you do not adjust the encoder, home can be off by
one encoder revolution.
Specification Rating
Maximum contact voltage rating 80V DC max
Operate time 500µs average
Contact bounce less than 200µs average
Contact resistance 150 milliohms average
Contact rating 5.0VA @ 0.35A max