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2. Installation
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.
Multiple wiring of EIA-485 circuits.
Host FACP
Host FACP
E IA -485 (–)
E IA -485 (+ )
22
Figure 12 EIA-485 Terminal Block - TB2
First LDM-32F -- -- -- -- -- -- Last LDM-32F
Figure 13 Wiring Multiple LDM-32Fs - EIA-485
Wiring the EIA-485 Terminal Block
TB 2
In (–)
Out (–)
Out (+)
In (+)
T B 2
ELR
T B 2
LDM-32F PN 50055:C 03/20/01
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