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3.11.7 I/O CONTROL
Figure 60 Monitor & Control – I/O Control
Relay Output Select
Select the initial state of the relays i.e. the state when the system boots up. Note that the "Closed" state is delayed
from power-up up to when the firmware has completed its boot process – this is approximately 30-40 seconds.
Digital I/O Select
The Digital I/Os are configurable as input or output signals. The following picture presents a simplified model of the
circuitry:
When in Output Mode, the Output State signal serves to control the Open Collector transistor output. When in Input
Mode the Input Sense signal is fed into the Fusion and reported.
As inputs:
Use LVTTL (3.3V) levels.
As outputs:
Use as an open collector with 100 ohm limiting resistor.
Fusion Multi-Network LTE Router PN 001-0000-602 Rev. B
| Page 76
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