GFM-100 Battery Ground Fault Monitor

Eagle Eye
Product Type
Other Equipment & Accessories
Electrical Equipment


The VGM-Series is an easy-to-use, inexpensive solution for monitoring battery voltage and ground faults. The GFM-100 works for 24V, 48V, 120V, & 240V applications. It reads battery bus status, detects out-of-limit conditions, and provides alarm indications per-user settings. The monitor’s status, under-voltage, and over-voltage trip values, ground fault, time delay, and IP address settings are easily accessible on the user-friendly color touchscreen interface. Modbus protocol is available on all units. Installation of the VGM-Series monitor is simple – it can be installed as a wall, panel, or DIN rail unit, and includes a mounting kit for DIN rail or wall mounts. A variety of models are available for the VGM-Series, including voltage and ground fault monitoring, or just voltage or ground fault monitoring independently.

    • Measurement Range Battery Voltage: 18-32, 38-60, 90-160, 180-320 VDC
    • Fault Resistance Limit Set: 1 – 100 kOhm
    • Fault Resistance Limit Set 1 – 100 kOhm
    • Output Contacts (4) Form C
    • Contact Rating 125 VAC/VDC: 0.5A
    • 30VDC: 2A
    • Maximum Switching Power 60 W
    • Power Requirements Powered by connected battery DC voltage
    • Noise Immunity IEEE/ANSI Standard C 37.90a-1989 compliance
    • Time Delay to Alarm Adjustable 1 – 999 seconds
    • Operating Environment Temp: 0 – 55°C (32 – 131°F), Humidity: 0 – 95% RH
    • Dimensions / Weight 147 x 91 x 45 mm (5.77 x 3.56 x 1.77 in) / 284 g (10 oz)
    • Color touchscreen simple interface
    • Ethernet connectivity to web interface, (4) Form C Contacts
    • Modbus TCP/IP output for all measured parameters
    • Simple installation with mounting kit for DIN rail or wall mount
    • Monitors 24V, 48V, 120V, & 240V batteries
    • Configurations available for different needs
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