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Detailed Operation
24V Discrete Input Port
A 5-pin M12 type female connector mounted at the bottom of the enclosure accepts three
digital inputs from field. These inputs are optically isolated sink type inputs.
Pin 1 of this connector can be used as a +24V DC auxiliary power supply for input devices
and to power the DC input circuits. The combination of input circuit current and external
device current must not exceed 300 mA.
Input status LEDs (I1, I2, I3) on the front of the unit indicate the On/Off states of the inputs.
Port Location and Pin Assignments
Typical 24 VDC Positive Logic Input Circuit
Input Specifications
8
Field
Input Connector
Input
Circuit
Inputs per Module
Rated voltage
Input Voltage Range
Isolation: Field to Frame Ground
Input Current
Input Characteristics
On–state Voltage
Off–state Voltage
On–state Current
Off–state Current
On response Time
Off response Time
StationPortal Hardware User's Guide – February 2010
3.3V
+
24V
_
3 (one group with a single common)
24V DC
0 to +30 VDC
1500 VAC for 1 minute.
7 mA typical at rated voltage
8.2 to 30 volts DC
0 to +5 volts DC
1.6 mA minimum
0.9 mA maximum
24 ms typical
24 ms typical
Pin Assignments
1
24 VDC for
input devices
2
Input 2
3
0V for input
devices
4
Input 1
5
Input 3
3.3V
CPU
GFK-2522A
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