Crystal Vision
Hardware installation
SW221 3G User Manual R1.4
6
01/09/2016
2.3 General Purpose Interface (GPI)
Each frame slot has up to six connections ‘a-f ‘for GPI control and monitoring. These
connections are available at the rear of the frame on the 26-way D-Type remote connectors.
GPI
Low (<1V)
High (+5V)
Notes
1
‘a’
See configuration table
Held low for tally
2
‘b’
Held low for tally
3
‘c’
See configuration table
Held low for tally
4
‘d’
Held low for tally
5
‘e’
Input 1 present
Input 1 absent
6
‘f’
Input 2 present
Input 2 absent
As supplied, each GPI output has a 270
Ω resistor in series with its output. This allows for an
external LED to be driven, connected to a DC voltage of +5V.
The GPI inputs can be used to control input selection/routing and are configurable for either
edge or level trigged. They can also be used to give a tally of the selection/routing. When GPI
control is selected to ‘level’ GPI = High (floating) selects Input 1 and GPI = Low (pulled to
ground) selects Input 2.
Output A and output B both have individual GPI controls/tally’s and can be selected to
perform the following functions.
Output A
Output B
No GPI control. Tally on ‘b’
No GPI control. Tally on ‘d’
Level on ‘a’. Tally on ‘b’
Level on ‘c’. Tally on ‘d’
Edge on ‘a’. Tally on ‘b’
Edge on ‘c’. Tally on ‘d’
Edge on ‘a’ and ‘b’. Tally on ‘a’ and ‘b’
Edge on ‘c’ and ‘d’. Tally on ‘c’ and ‘d’
Edge on ‘a’ and ‘b’. No tally
Edge on ‘c’ and ‘d’. No tally
4U frame GPI connections
GPI lines ‘a’ to ‘f’ of each card connect to one of eight rear remote connectors as follows:
Slot no.
‘a’ pin
‘b’ pin
‘c’ pin
‘d’ pin
‘e’ pin
‘f’ pin
1
8 (1)
9 (1)
18 (1)
26 (1)
19 (2)
20 (2)
2
7 (1)
16 (1)
17 (1)
25 (1)
10 (2)
11 (2)
3
8 (3)
9 (3)
18 (3)
26 (3)
19 (4)
20 (4)
4
7 (3)
16 (3)
17 (3)
25 (3)
10 (4)
11 (4)
5
5 (1)
6 (1)
15 (1)
24 (1)
1 (2)
2 (2)
6
4 (1)
14 (1)
13 (1)
23 (1)
3 (2)
4 (2)
7
5 (3)
6 (3)
15 (3)
24 (3)
1 (4)
2 (4)
8
4 (3)
14 (3)
13 (3)
23 (3)
3 (4)
4 (4)
9
3 (1)
12 (1)
22 (1)
21 (1)
12 (2)
13 (2)
10
10 (1)
11 (1)
19 (1)
20 (1)
21 (2)
22 (2)
11
3 (3)
12 (3)
22 (3)
21 (3)
12 (4)
13 (4)
12
10 (3)
11 (3)
19 (3)
20 (3)
21 (4)
22 (4)
U
ppe
r