La Marche A75R Installation And Operation Manual - page 5
1
A75R General Description
The La Marche model A75R uses proven SCR charging technology and is developed specifically for the railroad
market. It is typically used for signaling, highway crossing and motion detection systems where the battery is
cycled frequently. This filtered unit is designed and built to charge VRLA, Flooded Lead Acid and Nickel
Cadmium batteries. Some of the features that make this product unique are remote shutdown, lightning
protection and charger failure contacts to name a few. Remote shutdown allows you to place the charger
offline for battery testing purposes. The A75R is equipped with AAR style hardware on the input and output
connections. Temperature compensation is included standard to increase the longevity of the batteries and
charger. The unit is convection cooled and the components are designed to achieve MTBF in excess of 100,000
hours.
Standard Features
Microprocessor Controlled SCR Charging Technology
Single Phase AC Input 120/240V, 50/60Hz
Automatic AC Input Voltage Compensation ±10%
Complete Isolation from AC to DC
Lightning Protection
Temperature Compensation with Enable/Disable Switch
DC Analog Ammeter and Digital Voltmeter
Adjustable Current Limit from 50% to 105%
Filtered Output for VRLA Batteries
Remote Shutdown
Form “C” Contact for Charger Failure Alarm
Meets AREMA specifications
Meets ANSI C62-41
3-Year Warranty