Edwards SIGA-REL Technical

Chapter 1: Product design
SIGA-REL Technical Reference Manual 13
Application block diagrams
System overview
The SIGA-REL is a Signature Series module that interfaces a Signature loop
controller with fire suppression components. The SIGA-REL module works with
sprinkler systems and automatic extinguishing systems. Sprinklers include
preaction and deluge systems. Automatic fire extinguishing systems include the
fire suppression agents listed in Table 2.
The SIGA-REL includes two releasing circuits. These control RELA-EOL relays,
which in turn control the releasing solenoids. The releasing circuits act in unison
and cannot be controlled separately.
Prerelease circuit 1 supports audible notification appliances in order to sound
alert, prerelease, and release signals. The alert tone sounds at 15 pulses per
minute; the prerelease tone at 60 pulses per minute. The release tone is a steady
tone. Prerelease circuit 2 supports visual notification appliances.
Note: These signals do not meet UL 864 requirements for audible alarm
notification circuits intended for evacuation. This application requires additional
NACs and audible devices capable of generating the required NFPA 72 standard
alarm evacuation signal pattern.
See Chapter 2 “Installation” on page 19 for details about SIGA-REL wiring,
specifications, mounting, and abort mode settings. For wiring resistance
calculations, see the topic “Specifications,” earlier in this chapter.
Preaction or deluge sprinkler systems
Figure 2 illustrates the integration of the SIGA-REL with the fire alarm control
panel and a preaction or deluge sprinkler system. Sprinkler systems do not
include service disconnect stations, abort stations, or manual release stations.