Edwards Signaling ReadySet - Manual (Page 31)

Chapter 3: Installation and configuration
ReadySET Aspirating Smoke Detection System Installers Handbook 23
WARNING:
Electrocution hazard. All connections should be made with the power
turned off.
Power supply connections
The grounded power supply cable should be routed through the metal cable gland
provided, leaving about 1-1/4 inch (35 mm) of the cable extending from the bottom of
the cable gland. Depending on the type of cable used, it may be necessary to
increase the diameter of the cable with sleeving or insulating tape to ensure that the
cable is firmly held when the cable gland is fully tightened.
Note: If this equipment is part of a fire detection system, power should be supplied
from a supervised UL Listed power supply, designed for fire system use.
To connect the power supply:
1. Remove the ReadySET detector front cover, and then locate the power supply
terminal block.
Refer to Figure 2 on page 9 for an illustration of the ReadySET detector with the
front cover removed. Refer to Figure 10 below for a detailed illustration of the power
input terminals.
2. Connect 0 V and +24 VDC to the “0V” (-24) and “+24V” screw terminals,
respectively.
3. Connect the shielded (screened) wire to the “EARTH” screw terminal.
Figure 10: Power supply terminals
Relay connections
The ReadySET detector includes an Alarm and a Pre-Alarm relay, which will
transfer to the normally open (NO) position on alarm. It also includes a general
Fault relay, which will transfer to the normally closed (NC) position during a fault
condition or on power-down.