Connecting Annunciators
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AFP-300/AFP-400 Installation PN 50253:C1 05/22/97 A-15
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An 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 LCD-, ACM-, and ACS-
type annunciators; and Figure A-4 shows power connections for LCD-80s. The
following guidelines apply to Figure A-3 and Figure A-4:
• The power run to the LCD-80 or ACS Annunciator does not require a Power
Supervision Relay. Loss of power is inherently supervised through a
Communication Loss.
• The maximum 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 LCD-80s:
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