32
NanoTrak Autoalignment Controller
4.2.5 Rear Panel User I/O Connector
The User I/O connector exposes a number of internal electrical signals. For
convenience, a number of logic inputs and outputs are included, thereby negating the
need for extra PC based IO hardware. These user programmable TTL logic lines can
be deployed in applications requiring control of external devices such a relays, light
sources and other auxiliary equipment. A 5V supply is required to power the digital
outputs.
The pin functions are detailed in Fig. 4.2.
Notes.
* Opto-isolated, TTL level signal.
** For use with digital signals.
† TTL signal.
‡ For use with external signal monitoring equipment.
Fig. 4.2 USER I/O connector pin identification
Pin
Description
Return Pin
Description
Return
1
Ch 1 RS485 (-)
20
20
Ch 1 RS485 (+)
1
2
Ch 2 RS485 (-)
21
21
Ch 2 RS485 (+)
2
3
Not Used
22
Potentiometer Reference
23
4 Potentiometer Wiper Ch 1
23
Analog Ground
5 Potentiometer Wiper Ch 2
23
† External Trigger O/P
6
‡ Channel 1 10V O/P
25
† External Trigger I/P
7
‡ Channel 2 10V O/P
26
5V User O/P (isolated)
27 to 37
8
* DIG O/P 1
27 to 37 27
** Isolated Ground
9
* DIG O/P 2
27 to 37 28
** Isolated Ground
10
* DIG O/P 3
27 to 37 29
** Isolated Ground
11
* DIG O/P 4
27 to 37 30
** Isolated Ground
12
* DIG I/P 1
27 to 37 31
** Isolated Ground
13
* DIG I/P 2
27 to 37 32
** Isolated Ground
14
* DIG I/P 3
27 to 37 33
** Isolated Ground
15
* DIG I/P 4
27 to 37 34
** Isolated Ground
16
* DIG I/P 5
27 to 37 34
** Isolated Ground
17
* DIG I/P 6
27 to 37 36
** Isolated Ground
18
* DIG I/P 7
27 to 37 37
** Isolated Ground
19
* DIG I/P 8
27 to 37
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
20
21
22
23
24
25
26
27
30
31
32
33
34
35
36
37
28
29
