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Users Manual & Installation Guide
PV- 1800: Power supply module with GSM MODEM
Page 13 / 21
Digital outputs (CN2)
The digital section has 7 isolated digital outputs connected to a 10pin box header (CN2). The
outputs are configured as PNP outputs with their transistors connected to an external supply voltage
(+V_EXT). The table shows the connector layout:
The output circuitry looks like this:
Attention!
The user has to add proper free-wheeling diodes across inductive loads to protect the output
transistors against high voltages.
The software interface is explained in section PV-1800 register interface.
Pin no Name Pin no CDB-9F
1 Digital output #0 1
2 Digital output #1 6
3 Digital output #2 2
4 Digital output #3 7
5 Digital output #4 3
6 Digital output #5 8
7 Digital output #6 4
8 -Vext 9
9 +Vext 5
10 NC
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