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Installation 15088: J 10/22/99
Figure 4.4-1 Shield Termination in No Conduit (LIB-200 only)
Section 4.4 SLC Shield Termination
Shielded twisted pair cable can be used to minimize radiated emissions of radio frequency energy. The use of
shielded twisted pair cable is required when using the LIB-200. Terminating shielded twisted pair cable at the
cabinet is required for the LIB-200; shielded cable is not recommended for the LIB-200A and LIB-400. Use
unshielded twisted pair cable only. Figures 4.4-1 through 4.4-3 illustrate the LIB-200 shield terminations required.
Note: The use of shielded or untwisted cable in the LIB-200A and LIB-400 will result in shorter wire distances.
If shielded cable is employed with the LIB-200A and LIB-400, the shield should remain unterminated and non-
contiguous at each device for best system performance.
For a LIB-200 SLC Loop that is not contained in any conduit:
Do not allow the shield drain wire to enter the cabinet. Connect the drain wire to the outside of the cabinet via a BX type
connector. Maintain the continuity of the shield wire throughout the loop but do not connect to any devices.
Cabinet
LIB Terminal Block
1 (+) SLC Channel A
2 no connection
3 ( - ) SLC Channel A
For a LIB-200 SLC that is contained entirely in conduit:
The shield drain wire must be connected to the negative (-) side of the SLC. Do not allow the shield drain
wire or the shield foil to touch the cabinet. Make no connections to Terminal 2. Note: For NFPA Style 6 field
wiring of the SLC, connect each end of the shield to the negative side of the respective Channel. Chain the
shield wire throughout the loop but do not connect to any devices.
Figure 4.4-2 Shield Termination in Full Conduit (LIB-200 only)
Cabinet
LIB Terminal Block
1 (+) SLC Channel A
2 no connection
3 ( - ) SLC Channel A
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