Fire-Lite LDM-32F, Instruction Manual

Page: 22 / 64

2. Installation Wiring the EIA-485 Terminal Block
22
LDM-32F PN 50055:C 03/20/01
EIA-485 - TB2 Terminals
Wire as shown below.
Note: Leave a 120 ohm ELR installed across the EIA-485 Out terminals at the last LDM-
32F on the circuit (see below). All other LDM-32Fs should not have a resistor installed.
Figure 12 EIA-485 Terminal Block - TB2
Multiple wiring of EIA-485 circuits.
Figure 13 Wiring Multiple LDM-32Fs - EIA-485
T B 2
In (–)
Out (–)
Out (+)
In (+)
LD
M
32F-
T
B
2
.cdr
T B 2 T B 2
E IA -48 5 (– )
E IA -48 5 (+ )
Host FACP
First LDM-32F -- -- -- -- -- -- Last LDM-32F
LD
M32
F
-m
ul
t.cdr
Host FACP
ELR