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
Pin1
Pin 14
Pin 25
Pin 13
