Applied Motion 1240i-485 - Manual (Page 12)

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If the sensor output goes low at the limit, select the option “closed”. If the output is
open, or high voltage, choose “open”.
Other sensors have sourcing outputs. That means that current can flow out of the
sensor output, but not into it. In that case, wire the sensor this way:
If the sensor output goes high at the limit, choose the program option “closed”. if
the output is low at the limit, select “open”.
Wiring a Mechanical Limit Switch
You can use normally open or normally closed limit switches. Either way, wire them
as shown here. If the switch closes at the limit, select the option “closed”. If the
switch is open, or high voltage, choose “open”.
Wiring a Limit Sensor
Some systems use active limit sensors that produce a voltage output rather than a
switch or relay closure. These devices must be wired differently than switches.
If your sensor has an open collector output or a sinking output, wire it like this:
1240i
CCW LIMIT+
CCW LIMIT-
CW LIMIT-
+
5-24
VDC
SUPPLY
-
CW LIMIT+
1240i
CW LIMIT-
+
DC
Power
Supply
–
Limit
Sensor
CW LIMIT+
Wiring for Sinking or Open Collector Output
output
+
–
1240i
LIMIT-
+
DC
Power
Supply
–
Proximity
Sensor
LIMIT+
Wiring for Sourcing Output
output
+
–