Wiring A Signaling Line Circuit (Slc); 1: Slc Overview; 2: Slc Capacity - Notifier NFS2-3030/E Installation Manual

Wiring a Signaling Line Circuit (SLC)

3.15 Wiring a Signaling Line Circuit (SLC)
3.15.1 SLC Overview
Communication between the CPU and intelligent and addressable initiating, monitor, and control
devices takes place through a Signaling Line Circuit (SLC). You can wire an SLC to meet the
requirements of NFPA Style 4, Style 6, or Style 7 circuits. This manual provides requirements and
performance details specific to this control panel; for installation information and general
information, refer to the SLC Wiring Manual.
For electrical specifications, see Appendix A.2 "SLC Loops". For additional notes on SLC
resistance values, see Section 5.3 "Operational Checks".
3.15.2 SLC Capacity
The NFS2-3030 supports up to five pairs of loop control and expander modules, providing from
one to ten SLC loops. Loop capacity depends on operating mode:
• Flash Scan: 01-159 intelligent detectors, 01-159 monitor and control modules
• CLIP: 0-99 intelligent detectors, 01-99 monitor and control modules
FlashScan devices can operate in either FlashScan or, for retrofit applications, in CLIP mode. Older
models of CLIP devices only support addresses up to address 99. CLIP loops are limited to 99
detectors and 99 modules.
NOTE: Response times for CLIP loops may vary. CLIP loops must be tested to assure that
actuation of notification appliances occurs within 10 seconds after activation of an initiating
device. Systems with response time that exceed 10 seconds must be approved by the AHJ.
The following configuration guidelines may be used to improve the response times of CLIP loops:
1. All manual pull stations must be assigned addresses from 1-20.
2. Loops must be programmed for Rapid Poll (refer to the programming manual for specific
instructions).
3. Modules on a fully loaded loop must adhere to a ratio of two monitor modules to one control
module.
NFS2-3030/E Installation Manual — P/N 52544:N1 07/18/2014
Installation
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