Black Box LMC5234A Negative ground system configuration default position, Power Supply Modules

7.A readily accessible disconnect device shall be incorporated in the building installation wiring.

8.A suitable listed circuit breaker shall be provided in the building installation as the unit’s disconnect device. The branch circuit rating (i.e. minimum 15A listed circuit breaker, etc.).

DC Power Wiring, Replacing Power Supply and Fans

DC Power Supply Wiring Instructions

The following image shows the wiring configuration for a 48 VDC power supply in a negative ground system application. For positive ground system applications remove the chassis ground shorting jumper and connect it between the positive terminal and the chassis ground terminal. Alternatively, the chassis grounding jumper can be eliminated and the chassis ground connected at the power source. The ground terminal and the negative terminal are not connected inside the iMediaChassis/3.

DC Power Supply

Negative ground system configuration (default position)

NOTE

Incorrect wiring will result in chassis malfunction.

The 3-Slot Desktop Chassis is compliant with Isolated Grounding Plane practices. The POSITIVE and NEGATIVE terminals are isolated from chassis ground and must have a ground reference at the power-sourcing equipment.

Power Supply Modules

Power supply in all models of the 3-Slot Desktop Chassis are fixed, and not end-user replaceable.

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