Crystal Vision
Hardware installation
2.2 General Purpose Interface (GPI)
Each frame slot has 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)
0
‘a’
Bit 1
GPI recall of Presets
a,b,c,d high = Preset1, a,b,c,d low = Preset16
1
‘b’
Bit 2
2
‘c’
Bit 3
3
‘d’
Bit4
4
‘e’
Audio follow pulse
Pulse width equal to audio delay
5
‘f’
I/P, Ref missing
O/P frozen
Alarm set
No Alarm
As supplied, each GPI output has a 220Ω resistor in series with its output. This allows for
an external LED to be driven, connected to a DC voltage of +5V.
Note:
GPI recall of presets is not available when the ADDEC-210 is set to local board edge
control.
ADDEC-210 User Manual R1.5
11
16 November 2018
