Parallel I/O module/Extension

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4 port Extension Module, for Parallel I/O module.

Contents 1 Information 1.1 Binary values 2 D-Sub 15-pin 3 Images

Information

4EXM gives four extra outputs to the Parallel I/O module. Only one output can be active at any time, this means that 4EXM can only send signal pulses. The module contains a multiplexer and three pull-up resistors. The output is synced by the multiplexer. Green LED shows system in standby, while the blue LED is MMU Server time-out alarm. 4EXM quite simple takes three inputs and divides it binary, and out you get eight outputs. Since one output is active while all the inputs are low this is used for the standby LED. Totally we gain an extra four outputs.

Binary values

4EXM	Parallel 1	Parallel 2	Parallel 3	Binary value
1	32	0	0	32
2	0	64	0	64
3	32	64	0	96
4	0	0	128	128
5	32	0	128	160
6	0	64	128	192
7	32	64	128	224

D-Sub 15-pin

1. 0V
2. 5V
3. Input 1
4. Input 2
5. Input 3
6. Output 1
7. Output 2
8. Output 3
9. N/A
10. Server time-out alarm LED
11. Status-LED +
12. Output 7
13. Output 6
14. Output 5
15. Output 4

Images

4EXM installed in the Rack box

De-multiplexer function

De-multiplexer