Applied Motion STM23C-3CE - Manual (Page 32)

The Enable (EN) Digital Input
As mentioned in the previous section, the high-speed STEP and DIR inputs are designed for high speed operation.
The Enable digital input is designed for high speed digital input operation between 5 and 24 volts DC.
Note: If current is flowing into or out of an input, the logic state of that input is low or closed. If no current is flow-
ing, or the input is not connected, the logic state is high or open.
The diagrams on the following pages show how to connect the input to various commonly used devices.
Connecting the Input to a Switch or Relay
Connecting an NPN Type Proximity Sensor to an input
(When prox sensor activates, input goes low).
Connecting an PNP Type Proximity Sensor to an input
(When prox sensor activates, input goes low).
STM23
Switch or Relay
(closed = logic Low)
EN/IN3-
EN/IN3+
-
+
5-24
VDC
Power
Supply
STM23
NPN
Proximity
Sensor
EN/IN3-
EN/IN3+
output
+
–
5-24
VDC
Power
Supply
-
+
STM23
PNP
Proximity
Sensor
EN/IN3+
output
+
–
EN/IN3-
5-24
VDC
Power
Supply
-
+
32
STM23 Hardware Manual
920-0021F
2/14/2012