Application
The PS250 can be used with the following UL listed, 24VDC models
50GC
SelecTone Audible Signaling Device
300GC
SelecTone Audible Signaling Device
300GCX
SelecTone Hazardous Location Audible Signaling Device
300X
SelecTone Explosion Proof Audible Signaling Device
302GC
SelecTone Audible Signaling Device
302GCX
SelecTone Hazardous Location Audible Signaling Device
302X
SelecTone Explosion Proof Audible Signaling Device
300SSC
Supervised SelecTone Command
300Z
Supervised SelecTone Zone Panel
NOTES:
1. Battery current capacity changes throughout the operating temperature range.
2. Batteries are shipped partially charged. Allow at least 48 hours of charging time before oper-
ating from batteries.
3. In accordance with NFPA 72, wires to batteries do not have to be supervised provided that
they are in conduit or equivalent to prevent mechanical injury.
UL APPLICATIONS:
Meets UL 1481, 294 and 603, suited for UL certified fire alarms, burglar alarms,
& access control systems.
Other Certifications:
• NYC Department of Buildings Approved (MEA)
• California State Fire Marshall Approved (CSFM)
• NFPA 72 Compliant
III. INSTALLATION.
SAFETY MESSAGE TO INSTALLERS
People’s lives depend on safe installation of our products. It is important to follow all instructions
shipped with the products. This device is to be installed by a trained electrician who is thoroughly
familiar with the National Electrical Code and will follow the NEC Guidelines as well as local
codes.
The selection of the mounting location for the device, its controls and the routing of the wiring is
to be accomplished under the direction of the Facilities Engineer and the Safety Engineer. In addi-
tion, listed below are some other important safety instructions and precautions you should follow:
• Read and understand all instructions before installing or operating this equipment.
• Do not connect this unit to the system when power is on.
• After installation, ensure that all bolts and threaded joints are tightened.
• Establish a procedure to routinely check the power supply for proper activation and operation.
• Provide a copy of these instructions to the Safety Engineer, operator(s) and maintenance person-
nel.
• File these instructions in a safe place and refer to them when maintaining and/or reinstalling the
device.
Failure to follow all safety precautions and instructions may result in property damage, serious
injury, or death to you or others.
A. Physical.
The steel enclosure of the Model PS250 power supply is designed for mounting on a wall or
other substantial vertical surface.
When installing the power supply, do NOT use electrical conduit to support the unit because
the device weighs 11 pounds fully assembled without the batteries. When mounting the unit,
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