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
)
7
)
/
$
B
B
(
@
5
68 /
&'0&0 $
CD
CD
.
+
1#+ @5
=&6
