Hardware Installation—Installing the IFC-1010/2020
75
Short the termination point of one branch at a time and measure the DC
resistance from the beginning of the channel to the end of that particular
branch. The total DC resistance from the LIB-200 panel to branch end
cannot exceed 40 ohms. The total DC resistance from the LIB-200A or the
LIB-400 to branch end cannot exceed 50 ohms. Repeat this procedure for
all remaining branches. Refer to Figure 49 for Style 4 and Figure 50 for
Style 6.
Add the lengths of all the Style 4 branches on one SLC loop channel.
On the LIB-200, this sum cannot exceed 10,000 feet per channel.
(See Figure 49.)
LIB-200:
Branch A
Branch B
Branch C
Branch D
+
Branch E
3,048
m (10,000 feet) or less
LIB-200A or LIB-400:
Branch A
Branch B
Branch C
Branch D
+
Branch E
3,810
m (12,500 feet) or less
N39
LIB SLC Loop
Wiring
Requirements
Branch
Resistance
For Each
Channel
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