Product Description

The Honeywell 10310/3/1 is a high-precision Earth Leakage Detector (ELD) designed specifically for the Honeywell Fail-Safe Control (FSC) and Safety Manager systems. This module is an essential safety component for industrial automation, providing real-time monitoring of DC power distribution systems to detect insulation faults and ground leakages before they lead to system failure or hazardous conditions.

Engineered for the demanding environments of refineries and power plants, the 10310/3/1 ensures that the 24V DC floating power supplies used in safety-instrumented systems (SIS) remain isolated from the earth. By detecting even minor leakage currents, it allows maintenance teams to identify degraded wiring or faulty field devices without tripping the entire system. With three selectable monitoring modes—Continuous, 1 Hz, and 0.25 Hz—this module offers the flexibility to balance detection speed with the specific noise characteristics of your industrial network.

Technical Specifications

• Manufacturer: Honeywell

• Model Number: 10310/3/1 (and 10310/3/1CC)

• Product Type: Earth Leakage Detector (ELD)

• System Compatibility: Honeywell FSC / Safety Manager

• Power Requirements:

• Supply Voltage: 24V DC

• Monitoring Modes (Switch Selectable):

• Continuous Mode ("DC"): For real-time, high-speed leakage tracking.

• 1 Hz Mode: Intermittent monitoring at 1-second intervals.

• 0.25 Hz Mode ("1/4 Hz"): Low-frequency monitoring for high-capacitance networks.

• Functional Safety: Provides reference connections to system supply for accurate ground fault triangulation.

• Visual Indicators: Integrated LEDs for instant status and fault localizing.

• Mechanical Details:

• Dimensions: 39.1 cm x 14.1 cm x 6.0 cm

• Net Weight: 1.44 kg (1440g)

• Origin: USA

Application Scenarios

The 10310/3/1 is a critical diagnostic tool in high-availability safety loops:

• Emergency Shutdown (ESD) Systems: Monitoring the integrity of 24V DC loops that power critical isolation valves.

• Fire & Gas Systems: Ensuring that ground faults in outdoor field wiring do not cause false alarms or prevent detector activation.

• Floating DC Networks: Essential for any industrial control system where the DC supply is not grounded (floating) to maintain fault tolerance.

• Preventative Maintenance: Identifying moisture ingress in junction boxes by detecting slight increases in leakage current.