Edwards Signaling ReadySet - Manual (Page 32)

Chapter 3: Installation and configuration
24 ReadySET Aspirating Smoke Detection System Installers Handbook
The relays are of the volt-free type, with a maximum current capacity of 1 A at 24
VDC maximum. To comply with radiated immunity requirements, it is recommended that
the relay connection wires be looped once around a suppression ferrite (provided).
There should be about 1-1/4
inch (30 mm) of wire between the end of the ferrite and the
terminal block to give adequate stress relief. To achieve this, it is necessary to strip
back the cable shield approximately
5 inches (130 mm). The shield should be terminated under the cable gland cap.
The ReadySET detector interfaces to fire alarm panels using the detector’s ALARM,
PRE-ALARM, and FAULT relay contacts.
Make all connections shown in Figure 11 on page 25.
Input connection
The ReadySET detector is fitted with an “INPUT” connection. This provides an input
which can be used to monitor the PSU or to desensitize the detector by using the
day/night feature. DIP switch number 7 must be set as described in Figure 11 on page
25.
The INPUT terminals on the detector circuit board are set by default to monitor the
power supply. If power supply monitoring and ClassiFire override are not required, fit a
wire link across the two terminals to prevent a fault condition on power-up.
Make all connections shown in Figure 11 on page 25.