Appendix E: Wire Requirements - Fire-Lite MS-9200UDLS Manual

Appendix E: Wire Requirements

T-tapping of the SLC loop wiring is allowed for 2-wire (Style 4) configurations. The total
resistance of any branch cannot exceed 40 ohms. The total wire length of all branches cannot
exceed 10,000 feet (3,000 m).
Connecting external system accessories to the MS-9200UDLS main circuits must be carefully
considered to ensure proper operation. It is important to use the correct type of wire, gauge and run
length for each MS-9200UDLS circuit. Reference the chart below to specify wire requirements
and limitations for each MS-9200UDLS circuit.
Note:
1. If the SLC loop is to be run in conduit with Notification Appliance Circuits, the risk of
encountering problems can be greatly reduced by exclusively employing electronic sounders
instead of more electronically noisy notification appliances such as electromechanical bells or
horns.
2. The SLC can be programmed to operate in LiteSpeed mode (factory default setting) for a
quicker device response time. While shielded wire is not required in LiteSpeed mode, it is
recommended that all SLC wiring be twisted-pair to minimize the effects of electrical
interference. Use the following table to determine the specific wiring requirements for the
SLC when unshielded wire is used:
Refer to Table E.1 on page 209 and Table E.2 on page 210 for wiring requirements.
208 MS-9200UDLS/E/C Manual — P/N 52750:F 7/26/2010