AJA FS1 - Manual (Page 103)

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Appendix B:
GPI Connector Pinout
B
GPI Connections
GPI DE-9 Connector Pinout
The GPI inputs and outputs are electrically isolated from the power and ground on
the FS1 frame. There are two inputs and two outputs. Electrical isolation is
provided for up to two pieces of external equipment. The following guidelines apply
to the two GPI inputs and outputs:
• Input 1 and Output 1 share a common isolated ground on pins 6 & 8 (I/O
Ground 1),
• Input 2 and Output 2 share a common isolated ground on pins 7 & 9 (I/O
Ground 2).
• Pin 5, local chassis ground, may only be used as a reference when isolation is
not required.
• Both GPI inputs are internally pulled high through a 10K ohm resistor to an
isolated 5V supply, so that a relay contact closure or any device sinking at least
0.4 mA to ground will register a logic low.
Both GPI outputs are 5V TTL compatible, sourcing up to 6mA and sinking up to
4mA each.
Pin Function
1 - GPI Input 1
2 - GPI Input 2
3 - GPI Output 1
4 - GPI Output 2
5 - Chassis Ground
Pin Function
6 - I/O Ground 1
7 - I/O Ground 2
8 - I/O Ground 1
9 - I/O Ground 2
5 4 3 2 1
9 8 7 6