VSR digital 12/24 V 140 A

The BEP VSR DIG 12/24V MC20 digital voltage sensing relay (DVSR) is a bidirectional device essential for autonomous battery bank management aboard vessels. It uses advanced digital technology to intelligently combine and isolate battery banks, ensuring optimal charging and protecting the starter battery from discharge.

The primary function of the VSR DIG 12/24V MC20 is to manage battery charging by detecting voltage. It automatically connects battery banks when the charging voltage reaches a specific threshold (engagement) and disconnects them when the voltage drops below another threshold (disengagement), thus protecting the starter battery while allowing auxiliary batteries to charge.

This relay is multi-voltage and automatically selects between 12V DC and 24V DC systems. The maximum supply voltage it can handle is 32V DC.

The VSR DIG 12/24V MC20 can handle a continuous current of 125 Amperes and an intermittent current of 140 Amperes.

In standby mode, power consumption is 1.8 mA (or 1.6 mA for a 24V DC system). In storage mode, power consumption is 0 mA.

For a 24V DC system, the relay engages when voltage reaches 26.8V DC. It disengages when voltage drops to 25.6V DC.

The relay is designed to operate with 12V DC or 24V DC battery systems. It is compatible with most marine battery types, but it is always recommended to consult the installation manual for detailed specifications and specific configurations.

The alternator’s output in amperage should be between 20% and 35% of the battery bank’s size in ampere-hours (Ah). For example, for a 220 Ah battery bank, the alternator should have an output between 44 and 77 amperes.

The relay is designed to operate with 12V DC or 24V DC systems and automatically detects the voltage. The maximum supply voltage it can withstand is 32V DC, meaning it can tolerate voltage spikes up to this value, but its nominal operation is for 12V or 24V.

When the relay is engaged and battery banks are combined, the status LED remains lit continuously.

A rapid flashing LED indicates that the system voltage is either too high or too low. It is recommended to check the electrical system to identify the cause.

A brief flash every 5 seconds from the LED indicator means the relay is disengaging, i.e., the battery banks are about to be isolated.

Yes, the relay has an optional switching circuit that allows activating the DVSR or switching it to zero-power storage mode, which protects the starter batteries from discharging.

Yes, the relay has an output for a remote-mounted LED status indicator as an option, allowing you to view the relay's state from another location.

The provided wiring diagram is a guide showing DVSR connections. It is not intended to be a complete electrical system wiring diagram. It is recommended to consult a professional or a full installation manual for the entire system.

The relay is water-resistant but not designed to be submerged. It must be installed in a dry, protected location, shielded from direct spray and extreme temperatures, while remaining accessible for inspection and maintenance. Ensure adequate ventilation around the device.