54
Cabling and Connections
Reference Fin
Reference Fin - General Purpose Inputs (GPI) via 25 way D-Type
The Reference Fin has 48 general-purpose inputs (there are another 48 GPI’s if a second
Reference Fin is fitted) The action of each of these inputs may be allocated by the user from a
range of functions. The allocation is performed in the GPI menus. GPI’s are TTL compatible, GPI’s
can be activated by contact closure to GND. Any externally applied voltage must not exceed ±
20V.
GPI 1 to 24 and GPI 25 to 48
GPI 1 - 24 GPI 25 - 48
Pin Signal Pin Signal
1 GPI 1 1 GPI 25
2 GPI 3 2 GPI 27
3 GPI 5 3 GPI 29
4 GPI 7 4 GPI 31
5 GPI 9 5 GPI 33
6 GPI 11 6 GPI 35
7 GPI 13 7 GPI 37
8 GPI 15 8 GPI 39
9 GPI 17 9 GPI 41
10 GPI 19 10 GPI 43
11 GPI 21 11 GPI 45
12 GPI 23 12 GPI 47
13 GND 13 GND
14 GPI 2 14 GPI 26
15 GPI 4 15 GPI 28
16 GPI 6 16 GPI 30
17 GPI 8 17 GPI 32
18 GPI 10 18 GPI 34
19 GPI 12 19 GPI 36
20 GPI 14 20 GPI 38
21 GPI 16 21 GPI 40
22 GPI 18 22 GPI 42
23 GPI 20 23 GPI 44
24 GPI 22 24 GPI 46
25 GPI 24 25 GPI 48
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