GE Security
FHSD700C Series Product Guide
1 Introduction
Welcome to the GE Security FHSD700C Series Product Guide. This document is written to provide you
with information on technical specifications, cabling, and how to install, configure and operate these
detectors.
FHSD700C Series detectors are aspirating smoke detectors that provide early warning of fire by
analyzing air drawn through an air sampling pipe network. A highly sensitive detector chamber is able to
detect smoke at very low concentrations. Embedded and PC software enable the configuration of a
wide range of user defined parameters and reporting capabilities and extended input and output
functionality is achieved through the addition of plug-in modules.
1.1 Detector Models
Detectors in the GE Security FHSD700C range differ in a variety of ways including the number of
sample tube inlets available, ability to provide individual pipe sampling, aspiration system and sample
tube type.
FHSD724DC to FHSD7215DC detectors incorporate a rotary valve as a method of sampling individual
pipes and providing addressability. This unique feature is described in Principle of Operation on page 2.
The two typ
es of aspiration systems used include an internal fan (low pressure system), or an internal
vacuum pump (high pressure system). High pressure systems are capable of drawing air samples down
small bore tubes while low pressure systems use wide-bore rigid sample tubes. Small bore systems are
often preferred when installations need to be unobtrusive.
RS232, RS485 and TCP/IP interfaces enable flexible connectivity options for detector networking,
configuration and monitoring via GE Security Fire System Configuration and Management Software: GE
Security VSC and VSM4. When connected by TCP/IP, the Fire System Management software enables
the configuration and monitoring of a large number of systems by a single PC, which can be accessed
anywhere via any standard internet connection.
The differentiating attributes for the detector models are summarized in the following table.
Table 1-1: Detector Models and Differentiating Factors
Model FHSD720C FHSD721C /
FHSD721DC
FHSD724DC FHSD726DC FHSD7215DC
Applicable EN54-20 Classes A / B / C A / B / C A / B / C A / B / C A / B / C
Number of Sample Tubes 2 4 4 6 15
Individual Sampling (rotary valve) No No Yes Yes Yes
Individual Flow Monitoring No Yes Yes Yes Yes
Flow Monitoring System Thermal Pressure
Sample tube inlet diameter 25mm OD 25mm OD 6mm OD / 4mm ID
Aspirator system Fan Pump
Area Coverage 2000m
2
(VdS)
850m
2
(UL)
2000m
2
2000m
2
2000m
2
N/A
Available with Beacon Option No Yes Yes Yes Yes
Ethernet FHSD720NETC
only
FHSD721DC only Yes Yes Yes
Note: FHSD7215DC detectors are not designed for open-area coverage. However, for the purpose of
calculating sampling point spacing, the equivalent maximum area coverage is 1500 m
2
(16 000
ft
2
).
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