Nevion 3GHD-CHO-2x4 - Manual (Page 8)

3GHD-CHO-2x4/2x3 Rev. C
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5
Status and control from GPI
On the backplane there is a GPI port. This connector can be used for monitoring the modules
status. Also the change over function can be controlled through this connector.
GPI name
(setup1/
setup2)
Function
(setup1/ setup2)
Pin # Mode Direction Electrical
Maximums
for GPI
outputs:
Max current:
100mA
Max voltage:
30V
Max power:
200mW
Status General error status for the
module Pin
1 Inverted Open
Collector
(open is
alarm) Output
Main Loss of signal or lock at
main input Pin
2 Inverted Open
Collector
(open is
alarm) Output
Signal
present 1 Good signal routed to
output 1 Pin
3 Inverted Open
Collector
(open is
alarm) Output
Signal
present 2 Good signal routed to
output 2 Pin
4 Inverted Open
Collector
(open is
alarm) Output
Reset Reset selected input to
main Pin
5 TTL, 0V =
active level Input
Set Set selected input to
standby Pin
6 TTL, 0V =
active level Input
Not used Pin
7
Ground 0 volt pin Pin
8 0V.
Table 3 - Description of GPI interface
Figure 2 - GPI interface