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6.2 Protections
The Relay Driver is fully protected against system faults listed below.
Recovery is automatic for short circuits. Channel overloads are current-
limited. Refer to section 6.1 for fault LED indications.
Reverse polarity – Relay Driver power
•
Reverse polarity – Channel input voltage, all 4 channels
•
Short circuit and overload – all 4 channels
•
6.3 Maintenance
The Relay Driver is designed to run automatically without the need for
user intervention. However, the operator should perform the following
tasks annually to ensure continued operation:
Verify that the LEDs indicate normal operation.
Tighten all terminal connections. Check for corrosion or loose
connections
Check the Relay Driver power source. Verify that the source voltage is
within the recommended voltage window (8 – 68Vdc)
Inspect the communications cables for loose connections (if applicable)
Inspect for signs of nesting insects
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