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Technical Guide

Dual Digital Module

LED Diagnostics

“PWR” LED: When the Dual Digital Module is powered up, the PWR

LED (located below the address switches) should light up and stay on

continuously. If it does not light up, check to be sure that the power wir-

ing is connected to the board, the connections are tight, and the VCM-X

Modular series controller is powered. If after making all these checks,

the PWR LED does not light up, the module is probably defective.

“COMM” LED: The COMM LED lights up to indicate Communica-

tions between the module and the VCM-X Modular series controller. If

the COMM LED does not blink, then communications have not been

established. Check the connection between the VCM-X Modular Con-

troller, the VCM-X Modular E-BUS Controller, the E-BUS Distribution

Module, and the Dual Digital Module.

“STAT” LED: As previously described, this LED will blink out the

operation mode that the Dual Digital Module is operating under. When

the board is ﬁ rst powered up, the STAT LED will do the following:

 Light up

 Blink out status code every ten seconds to indicate

controller status

“ALARM” LED: As previously described, this LED will blink on and

off to indicate alarms and diagnostics.

Troubleshooting

Other Checks

NOTE: The Dual Digital Module contains no user-serviceable

parts. Contact qualiﬁ ed technical personnel if your mod-

ule is not operating correctly.

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