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HD2200
SECTION 3
HD22OP271100 Version 1 Issue 1
3.5
GPI
The General Purpose Interfaces (GPI’s) are
accessed via a 25 way D type female connector.
In the table GPI refers to inputs and GPO refers to
outputs.
Pin
Function
2
GPI 0 Signal
14
GPI 0 Return
3
GPI 1 Signal
15
GPI 1 Return
4
GPI 2 Signal
16
GPI 2 Return
5
GPI 3 Signal
17
GPI 3 Return
6
GPI 4 Signal
18
GPI 4 Return
7
GPI 5 Signal
19
GPI 5 Return
8
GPO 4 Signal
20
GPO 4 Return
9
GPO 5 Signal
21
GPO 5 Return
10
GPO 0 Signal
22
GPO 0 Return
11
GPO 1 Signal
23
GPO 1 Return
12
GPO 2 Signal
24
GPO 2 Return
13
GPO 3 Signal
25
GPO 3 Return
1
Ground
The output (GPO) characteristics are as follows:
Operating Voltage Range
0 to ±60 V
(DC/AC peak)
Maximum Load current
1.0 A (AC/DC)
Maximum On-State
Resistance @ Tamb =+25°C
500 mOhm
Minimum Off-State
Resistance
@Tamb =+25°C,V=±48V
100 MOhm
GPI Overview
The GPI provides contact closure tally outputs that
can be used to turn on lamps etc.
The equivalent circuit of the GPI input is shown on
the next page.
Note. On a standard machine when delivered, GPI
inputs 0 to 3 select machine memories 1 to 4 and
GPI outputs 0 to 3 provide tally outputs indicating
which memory is selected.
The GPI port is polled approximately 2mS after the
vertical sync group of the output video.
Note. For interlaced output standards the polling
occurs at field rate and for progressive output
standards it occurs at frame rate.