Design Considerations
22 PN 15842:K 7/23/2002
Figure 3-1 Supervising Receive Only Annunciators
3.5 Cabinet Mounting of Annunciators
ACS modules must be mounted in special backboxes or in the following
cabinets using a hinged dress panel such as ADP-4/4B or DP-DISP:
• ACM-16AT/ACM-32A in CAB-3 series cabinets
• ACM-24AT, ACM-48A in CAB-4 series cabinets
See Section 2.5 “Cabinet & Panel Hardware”. For information on boosting the
EIA-485 circuit signal or adding additional devices (not addresses), see the
RPT-485W/RPT-485WF Installation Manual.
Note: A common reference connection must be made between multiple power
supplies for the EIA-485 circuit to function properly. In the AM2020/AFP1010,
a common connection between the reference terminal of the SIB-2048A/SIB-
NET EIA-485 interface and the reference terminal (battery negative) of ACS
power supplies must be made.
AnnunciatorFire Alarm
Control Panel
Two-wire
EIA-485 Circuit
caba3.wmf, ACM-24ATface.cdr
Annunciator Expander
Expander
“Receive only”
Annunciator set to
address “X” and
installed upstream.
Full Function
“Receive/Transmit”
Annunciator set to
Address “X”
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