DEHN record DRC IRCM Insulation and Residual Current Monitoring Unit 910710

The DEHN record DRC IRCM 910710 is a combined insulation and residual current monitoring unit for DIN rail mounting. It continuously monitors insulation resistance and residual currents in TN, TT, and IT systems, providing early detection of insulation faults and leakage currents. With its integrated LCD display and Modbus RTU interface, it offers both local and remote monitoring capabilities.

Highlights

• Monitors insulation resistance from 1 kΩ to 10 MΩ and residual current from 0.3 mA to 30 A
• Two potential-free changeover relay outputs for alarm signaling
• Modbus RTU (RS485) communication for integration into building management systems
• Backlit LCD for on-site status and configuration
• Compact 4-module DIN rail housing

In daily use

The DRC IRCM is suited for monitoring electrical installations where insulation degradation or residual currents could indicate developing faults. The adjustable alarm thresholds allow adaptation to specific system requirements, and the relay outputs can trigger external alarms or disconnect devices. The Modbus interface enables remote monitoring and data logging, reducing the need for manual inspections.

Full specifications

• Supply voltage: 230 V AC (50/60 Hz)
• Insulation resistance monitoring range: 1 kΩ to 10 MΩ
• Residual current monitoring range: 0.3 mA to 30 A
• Relay contact rating: 250 V AC / 5 A
• Communication interface: Modbus RTU (RS485)
• Display type: LCD with backlight
• Mounting type: DIN rail (4 modules)
• Degree of protection: IP20
• Operating temperature range: -25 °C to +55 °C
• Insulation measurement principle: Pulsed DC current
• Residual current measurement principle: True RMS (AC/DC sensitive)
• System compatibility: TN, TT, IT systems
• Standards: IEC 61557-8, IEC 61557-9

Final note

The DRC IRCM provides continuous monitoring of insulation and residual current, helping to detect faults before they cause downtime or safety hazards.