Installation and Configuration
Npaq MR Hardware Manual
2.5.4. Opto-Isolated Inputs
The digital inputs are opto-isolated and may be connected to current sourcing or current sinking devices, as
shown in
and
. These inputs are designed to connect to other ground-referenced
circuits and are not intended for high-voltage isolation.
Inputs 0-3 and inputs 4-7 have separate common inputs (refer to
). Each 4-bit bank of inputs must
be connected in the same configuration (sinking or sourcing). Bank 1 may be connected differently from
Bank 2, however.
The opto-isolator's common connections can be directly connected to the drive's power supply; however,
doing so will effectively defeat the isolation and will reduce noise immunity.
Table 2-26:
Digital Input Specifications
Input Voltage
Approximate Input Current
Turn On Time
Turn Off Time
+5 V
1 mA
200 usec
2000 usec
+24 V
6 mA
4 usec
1500 usec
Table 2-27:
Opto-Isolated Input Connector Pin Assignment
Pin#
Description
In/Out/Bi
4
Input Common for Opto-Inputs 0 - 3
Input
5
Optically-Isolated Input 0
Input
6
Optically-Isolated Input 1
Input
7
Optically-Isolated Input 2
Input
8
Optically-Isolated Input 3
Input
16
Input Common for Opto-Inputs 4 - 7
Input
17
Optically-Isolated Input 4
Input
18
Optically-Isolated Input 5
Input
19
Optically-Isolated Input 6
Input
20
Optically-Isolated Input 7
Input
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