Mastervolt 77031700 Battery Contactor Interface

Mastervolt 77031700 Battery Contactor Interface (for Pulse Hold Relays)

The Mastervolt 77031700 Battery Contactor Interface (BCI) is a specialized MasterBus network interface module designed to integrate and control pulse-hold (bi-stable / mechanical latching) DC battery contactors and remote motorized switches. By bridging high-current latching relays to the MasterBus communication network, this module enables remote control and automated switching of main battery banks, load disconnects, or emergency battery parallel systems directly from MasterBus displays, software interfaces, or automated system events.

Latching DC contactors require brief pulse signals rather than continuous energizing voltage to open or close, eliminating continuous coil power consumption. The Mastervolt 77031700 delivers precise ON/OFF actuation pulses to the relay coils while reading contact status feedback. This provides zero-standby-draw remote switching capability, making it an essential component for energy-efficient battery management in marine, mobile, and off-grid renewable energy installations.

Key Features

• Zero Coil Standby Drain Control: Generates momentary switching pulses to drive bi-stable latching contactors, preserving battery bank charge.

• MasterBus Automated Integration: Enables automated low-voltage disconnects, high-voltage cutoffs, and remote battery switching triggered by Masterview/EasyView panels or system events.

• Real-Time Status Monitoring: Reads auxiliary switch contacts on compatible contactors to broadcast real-time ON/OFF status across the MasterBus data network.

• Flexible Mounting: Compact, low-profile housing supports standard DIN-rail clip mounting or flat surface mounting inside electrical distribution boxes.

Specifications