ADT Unimode 400 Multi-Net Installation Manual page 179

Connecting Annunciators
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Unimode 400 Installation PN 50710:A 10/22/97
An ADT-LCD-80 operated in ACS mode connects to TB4 on the CPU using a
power-limited EIA-485 circuit. Figure A-3 shows power connections for ADT-LCD-,
ADT-ACM-, and ADT-ACS- type annunciators; and Figure A-4 shows power
connections for ADT-LCD-80s. The following guidelines apply to Figure A-3 and
Figure A-4:
• The power run to the ADT-LCD-80 or ACS Annunciator does not require a Power
Supervision Relay. Loss of power is inherently supervised through a
Communication Loss.
• The maximum ADT-LCD-80 current draw from the power supply is 500 mA.
• Power must be supplied from a regulated 24 VDC power supply.
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Figure A-4 shows typical power connections for ADT-LCD-80 annunciators:
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