SDI-EO-2 /SDI-EO-2-RC
Rev. 2
5
Module status
The status of the module can be monitored in three ways.
1. GYDA-SC System Controller (optional)
2. GPI at the rear of the frame
3. LEDs at the front of the frame
Of these three, the GPI and the LEDs are mounted on the module itself,
whereas the GYDA-SC System Controller is a separate module giving detailed
information on the card status. The functions of the GPI and the LEDs are
described in sections 5.1 and 5.2. The GYDA-SC System Controller is
described in a separate user manual.
5.1
GPI Alarm – Module status outputs
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 figure below.
SDI-EO-2 module GPI pinning:
Signal Name
Pin
# Mode
Status
General error status for the module Pin 1 Open Collector
LOS1
Loss of Signal 1
Pin 2 Open Collector
LOS2
Loss of Signal 2
Pin 3 Open Collector
Laser fail Laser fail
Pin 4 Open Collector
Ground
0 volt pin
Pin 8 0V
Figure 4: GPI output.
Electrical Maximums for GPI outputs
Max current: 100mA
Max voltage: 30V
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