Fire-Lite ACM-32AF Annunciator Modules - Manual (Page 25)

Wiring and Connecting 4. Installation
ACM-16ATF/ACM-32AF Manual PN 51480:A0 02/02/01
25
EIA-485 Circuit
Connect the EIA-485 annunciator circuit wiring to the removable terminal
blocks as illustrated below.
• Do not “T-Tap” the power-limited EIA-485 circuit. It will not function
properly.
• Leave the 120-ohm ELR (PN 71244) installed across the EIA-485
‘Out’ terminals at the last annunciator on the circuit. Remove this
resistor from all other annunciators.
• There is a maximum distance of 6000 feet between the panel and the
last annunciator on the EIA-485 circuit.
Figure 5 Connecting EIA-485 Wiring to Terminal Blocks
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-
+
+
-
-
+
+
– +
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-
+
+
A
C
S
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ei
a.cdr
In
Out
Out
In
In
Out
Out
In
In
Out
Out
In
TB2 - Last
Annunciator
TB2 - Middle
Annunciator
TB2 - First
Annunciator
EIA-485 Circuit
from Control Panel