Micro
ARE-M Series 24V Chargers, Single Phase
Circuit Description
PM990-1070-24, Issue 12
5-2
The power rectifier converts the AC voltage from the transformer into a DC voltage. It consists of silicon diodes
arranged in a half-wave circuit. The output of the rectifier is filtered and supplied to the battery and the load
through the DC circuit breaker.
The front panel consists of a 2-line digital display, a 4-button keypad, and LEDs (On/Off and Alarm). The
display and LEDs are mounted directly to the Control and Display Board. The keypad adheres to the metal front
panel of the charger and is connected to the Control and Display Board by short ribbon cable.
Alarm connections for external annunciation of alarms are provided on the Interface Board. The standard board
has three alarm relays and the multiple alarm board has nine alarm relays. All outputs are dry-contact form C
relays.
Each relay has three connections: common, normally open, and normally closed. The normally open (NO) and
normally closed (NC) labels are for an un-powered charger.
