FS3 Frame Synchronizer/Converter v1.1r1 93 www.aja.com
Appendix B – FS3 Pinouts
GPI Pinouts
Figure 17. GPI DB-15F Connector Pinout
1
15
11
5
6
10
Ground
GPI In
1
GPI In
2
GPI In
3
GPI GND
1
GPI GND
2
GPI In
4
GPI Out
1
GPI Out
2
GPI GND
3
GPI GND
4
GPI Out
3
GPI Out
4
NC
Ground
Table 5. Pinouts Description
Pin Function
Pin
Function
Pin Function
1
Ground
6
GPI GND 2
11
GPI GND 4
2
GPI In 1
7
GPI In 4
12
GPI OUT 3
3
GPI In 2
8
GPI OUT 1
13
GPI OUT 4
4
GPI In 3
9
GPI OUT 2
14
NC
5
GPI GND 1
10
GPI GND 3
15
Ground
The GPI inputs and outputs are electrically isolated from power and ground
on the FS3 frame. There are four inputs and four outputs. Electrical isolation is
provided for up to four pieces of external equipment.
The following guidelines apply to the four GPI inputs and outputs:
• GPI In 1 and GPI Out 1 share a common isolated ground on pin 5 (GPI GND 1),
• GPI In 2 and GPI Out 2 share a common isolated ground on pin 6(GPI GND 2).
• GPI In 3 and GPI Out 3 share a common isolated ground on pin 10(GPI GND 3).
• GPI In 4 and GPI Out 4 share a common isolated ground on pin 11 (GPI GND 4).
• Pins 1 and 15, local chassis ground, may only be used as references when
isolation is not required.
• All four GPI inputs are internally pulled high through a 10K ohm resistor to an
is5V supply, so that a relay contact closure or any device sinking at
least 0.4 mA to ground will register a logic low.
• All four GPI outputs are +5V TTL compatible, sourcing up to 6mA and sinking
up to 4mA each.
• GPI Inputs light the front panel EXT LED when triggered.
The following illustration shows typical external wiring to the GPI connector. The
GPI inputs require some kind of contact closure between the input pin and the
input ground pin to register the logic low that triggers the GPI input.
You can connect the outputs to TTL buffers that communicate the GPI output
logic levels to other devices. For example, you could use an opto-isolator
controlling a relay to activate other equipment as shown below.
