NCM-1 Description Noise Control Module The Gamewell-FCI, NCM-1 Noise Control Module (patented) is used to reduce the common noise (for example, noise that is present on both conductors) on the Signaling Line Circuit (SLC). The NCM-1 allows the use of untwisted, unshielded wire on the SLC. Applications that have audio or fire fighters’ telephones require the use of twisted/shielded wiring for all circuits including the SLC. The NCM-1 may also be used in these applications to further reduce the common mode noise. Black White Red SLC Loop “-“ (Black) Shield (White) SLC Loop “+” (Red Installation To wire the NCM-1, connect it directly in line with the SLC Loop. To connect the SLC circuit, the NCM-1 includes a pig-tail lead. To determine the maximum wiring distance, refer to Table 1. All distances are rated a maximum allowable distance and AWG wire. Note: For systems without shield, cut the white wire. Specifications Table 1 lists the SLC wiring specifications that do not include audio for the following Systems. • E3 Series (Expandable Emergency Evacuation) System • S3 Series (Small Addressable FACP) System • 7100 Series System Table 1: E3 Series®, S3 Series and 7100 Series SLC Wiring Specifications (Without Audio) Maximum More Than One Acceptable Distance Conduit Shield Twisted-Pair SLC Loop? Wire AWG. Per Loop NO NO NO YES 12-18 750 ft/Loop NO 12-18 1,000 ft NO NO YES YES or NO 12-18 2,000 ft/Loop NO YES NO YES or NO 12-18 2,000 ft/Loop YES YES NO YES 12-18 2,000 ft/Loop NO 12-14 5,000 ft YES NO YES YES 12-18 3,000 ft NO 12 10,000 ft1 YES NO NO YES 12-18 500 ft/Loop NO 12-18 2,000 ft NO YES YES YES 12 10,000 ft1 NO 12 10,000 ft1 YES YES YES YES 12 10,000 ft1 Note1: A smaller gauge wire will support shorter distances as follows: • 14 AWG. 8,000 ft. Maximum • 16 AWG. 4,875 ft. Maximum • 18 AWG. 3,225 ft. Maximum NCM-1 Features • • • • • Mounts in a cabinet or external enclosure. Uses multiple NCMs for T-Tapped non-shielded connections. Connects directly to the Signaling Line Circuit. Provides Pig-Tail Type connections. Patented Design (U.S. Patent # 5, 210, 523). Ordering Information Part Number NCM-1 E3 Series® is a registered trademark of Honeywell International Inc. Description Noise Control Module SIGNALING MEA Approved FDNY: CS68 COA #:289-91-E 7165-0028:0141 S2424 7165-0028:0153 GAMEWELL-FCI 12 Clintonville Road, Northford, CT 06472-1610 USA • Tel: (203) 484-7161 • Fax: (203) 484-7118 Specifications are for information only, are not intended for installation purposes, and are subject to change without notice. No responsibility is assumed by Gamewell-FCI for their use. www.gamewell-fci.com 9021-60577 Rev. C page 1 of 1 ©2013 by Honeywell International Inc. All rights reserved.