Wiring A Signaling Line Circuit (Slc); Overview; Capacity; Installation - Notifier NFS-3030/E Installation Manual

Wiring a Signaling Line Circuit (SLC)

3.19 Wiring a Signaling Line Circuit (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".

Capacity

The NFS-3030 supports up to five pairs of loop control and expander modules, providing from one to
ten SLC loops. Each loop has a total capacity of 318 intelligent/addressable devices:
• 01-159 intelligent detectors
• 01-159 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 reduce 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.

Installation

Install loop control and expander modules as described in Section 3.14.2 "Loop Control Module, Loop
Expander Module". Note that the unique SLC loop number assigned to a module does not need to match
the module's location in the cabinet. For details on designing, installing and configuring SLC loops, see
the SLC Wiring Manual.
NFS-3030 Installation PN 51330:C 10/28/2003
Section 3 Installation
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