Black Box TS1002A, TS1003A, TS1000A-R5 manual High-Voltage Input Protection

OMNISCANNER

A.28 High-Voltage Input Protection

The test interface withstands input hazard conditions that arise from normal telephone interfaces (48 VDC at less than 80 nA) or 24-VAC power used to power many telephone keysets. The unit detects when a voltage of greater than +15 volts is applied on the inputs and sounds a warning to alert the user to remove the hazard condition immediately to prevent possible damage to the input circuits.

NOTE

Measurements cannot be performed when hazard conditions are present.

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