Weatherall Equipment &
Instruments Ltd
Unit 1, Station Approach
Wendover, Bucks
HP22 6BN. United Kingdom
T: +44(01296 622180
E:
W:www.weatherall-uk.com
Overview
The Weatherall WPSU-24 series of power supplies are switched mode power
supplies with three normally closed volt-free outputs for signalling status and
serviceability of the units.
The power supplies all provide a nominal 27.4V when powered from a 230V AC
supply and a nominal 24V when powered from standby batteries.
The power supplies have the following features: -
• PSU fault volt-free output and LED display
• Battery fault volt-free output and LED display
• AC power status volt-free output and LED display
• On/Off power switching control input with pull-up, compatible with voltage-free
contacts
• Jumper for selecting inverted or normal power switching operation
• Status LED display indicating normal/standby operation and On/Off switching
status
• Power supply internal fault monitoring
• Over-voltage output protection
• Inductive and capacitive load switching surge protection and snubbing
• Intelligent electronic fuse output protection with automatic reset
• Highly efficient power conversion – better than 85%
• Constant current battery charging
The switched output is designed for highly inductive loads such as access control
door strikes and locks and is protected to control high voltage back-EMF spikes.
