micro
HAM ©
2016
All rights reserved
APPENDIX A – CONNECTORS
PORT A, DB25F
Pin #
Label
Description
1
EXT PWR IN
External power input for PORT A, max. +24V*
2
NC
Not connected
3
NC
Not connected
4
NC
Not connected
5
NC
Not connected
6
NC
Not connected
7
NC
Not connected
8
NC
Not connected
9
NC
Not connected
10
PORT A7
PORT A7 output
11
PORT A8
PORT A8 output
12
PORT A9
PORT A9 output
13
PORT A10
PORT A10 output
14
NC
Not connected
15
NC
Not connected
16
NC
Not connected
17
NC
Not connected
18
EXT PWR GND
Power ground. Connect return of external PORT A common power to this pin.*
19
CONTROL GND
Power ground. Connect control cable shield to this pin.
20
PORT A1
PORT A1 output
21
PORT A2
PORT A2 output
22
PORT A3
PORT A3 output
23
PORT A4
PORT A4 output
24
PORT A5
PORT A5 output
25
PORT A6
PORT A6 output
SHELL
GND
Connected to the system ground and case.
* When using an external power supply, connect the positive terminal to pin 1, the negative terminal to pin 18
and move the Port A jumpers to EXT/SRC. Never 24V and do not reverse polarity!
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