Slc Overview; Polling Protocols - Johnson Controls IFC-200 Wiring Manual

SLC Overview

2951J, 2951TJ and 2951TMJ (Acclimate™) Photoelectric Detectors Installation Document
5351J Thermal Detector Installation Document
5351RJ Rate of Rise Sensor Installation Document
5951J, 5951RJ, and 5951HJ Thermal Detectors Installation Document
M500FPJ Firephone Control Module
M302MJ Zone Interface Module Installation Document
FTX-P1J HARSH™ (CLIP mode) Installation Document
M500XJ Isolator Module Installation Document
JBG-12LX Addressable Pull Station Installation Document
Note: Refer to the Device Compatibility Document for compatible conventional devices.
1.4 SLC Overview
Communication between the control panel and intelligent addressable monitor and control devices
takes place through a Signaling Line Circuit (SLC), which can be wired to meet the requirements of
NFPA Style 4, Style 6, or Style 7.
At least one secondary surge protector must be used with each SLC wiring pair whenever SLC
wiring runs outside the building. For detailed information refer to Appendix B, "SLC Surge
Suppression", on page 58.

1.5 Polling Protocols

FlashScan® is a patented system (US Patent Number 5,539,389) that greatly enhances the speed of
communication between analog intelligent devices. Communication is in a grouped fashion. If one
of the devices within the group has new information, the panel CPU stops the group poll and
concentrates on single points. Not all panels are FlashScan® capable; see "Protocol Use" below.
CLIP (Classic Loop Interface Protocol) polls devices in sequential order. Many but not all
FlashScan-capable devices can be set to run in CLIP mode; see installation sheet shipped with the
device.
Protocol Use: LCM-320/LEM-320 loops on IFC2-640, IFC-640/E and IFC-3030/IFC2-3030, and
SLC loops on IFC-320 can run in FlashScan mode or CLIP mode. IFC-200, IFC-300/IFC-400,
IFC-1010 and IFC-2020 run in CLIP mode only.
Many FlashScan devices can be programmed to run in either CLIP or FlashScan mode. Use one of
the following three options with SLC loops:
1. Program all modules and detectors on an SLC as FlashScan.
2. Program all modules and detectors on an SLC as CLIP.
CAUTION:
!
Do not program more than 99 addresses on a CLIP-mode SLC loop, because this will slow the
system down and compromise the response time of the panel to display off-normal events.
3. Program all detectors as CLIP and all modules as FlashScan on an SLC.
CAUTION:
!
Do not program modules as CLIP and detectors as FlashScan on the same SLC. This combination
does not work.
Johnson Controls, Inc. SLC Wiring Manual — P/N 51870:G 04/23/2009
Table 1.1 Reference Documentation (3 of 3)
Introduction
I56-1930
I56-1363
I56-1634
I56-1931
I56-2550
I56-1212
I56-1485
I56-1384
51242
11