Nevion HDSDI-CHO-2x1 - Manual (Page 9)

HDSDI-CHO-2x1 Rev. G
nevion.com | 9
5 Module status
The status of the module can be monitored in three ways.
1. GYDA System Controller (optional).
2. GPI at the rear of the sub-rack.
3. LED’s at the front of the sub-rack.
Of these three, the GPI and the LED’s are mounted on the module itself, whereas the GYDA
System Controller is a separate module giving detailed information on the card status. The
functions of the GPI and the LED’s are described in sections 5.1 and 5.2. The GYDA
controller is described in a separate user manual.
5.1 GPI alarm and control
– Module status outputs and selection of
inputs
These outputs can be used for wiring up alarms for third party control systems. The GPI
outputs are open collector outputs, sinking to ground when an alarm is triggered. The GPI
connector is shown in the figure below.
As of hardware version 4 or newer of the product, the Status signal is inverted,
sinking to ground when signal is good. Earlier versions have a non-inverted
Status signal.
The two GPI inputs can be used to control switching of inputs.
Electrical Maximums for GPI outputs
Max current: 100mA
Max voltage: 30V
HDSDI-CHO-2X1 module GPI pinning:
Signal Name Pin # Mode Direction
Status General error status for the module Pin 1 Inverted Open
Collector Output
LOS Loss Of Signal at selected input Pin 2 Open Collector Output
Input 1 Input 1 selected (IN1) Pin 3 Open Collector Output
Input 2 Input 2 selected (IN2) Pin 4 Open Collector 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
Ground 0 volt pin Pin 8 0V.
Figure 7: GPI Outlet