Bender IRDH265-422 Insulation Monitoring Device

Description

The Bender IRDH265-422 from the A-ISOMETER Serie 260 is an advanced insulation monitoring device for unearthed AC, AC/DC, and DC power systems (IT systems). It provides continuous monitoring of the insulation resistance to detect and signal insulation faults at an early stage. This is crucial for maintaining operational safety and system availability in critical applications such as hospitals, data centers, and industrial control systems.

Specifications

• Rated System Voltage (Un): 3AC/AC 0 to 690V, DC 0 to 500V
• Supply Voltage (Us): DC 19.2 to 84V
• Power Consumption: 6.0VA
• Response Value (RAN): Adjustable from 10 to 990 kOhm
• Relay Contacts: 2x changeover contacts, AC 250V 5A
• Software Version: D74 V2.8-4

Label Info

• Manufacturer: Bender
• Model: IRDH265-422
• Article No.: B91068002
• Serial No.: 0202010006

Application

This device is ideally suited for monitoring unearthed power supplies in various sectors, including industrial manufacturing, renewable energy installations (solar, wind), marine applications, and mobile power generation. It is essential for preventing electric shock hazards, fire risks, and unexpected production stops.

Country of Origin

Made in Germany.

CO2 Impact

Choosing this refurbished Bender IRDH265-422 saves approximately 14 kg of CO2 compared to manufacturing a new one. This environmental saving is equivalent to driving a car for 70 kilometers.

Availability

This is an obsolete item, no longer in production by the manufacturer. Available from our stock while supplies last. Order now from PLC2Day for expert support and fast delivery.

FAQ

Yes, the device is designed for unearthed AC, AC/DC, and DC systems (IT systems). Its rated voltage is up to 690V for AC and up to 500V for DC systems.

The newer iso685 series offers advanced features such as pre-energization insulation measurement, a wider frequency range for monitoring systems with variable frequency drives, and enhanced communication protocols like Modbus TCP for better integration into modern control systems.

The IRDH265-422 can be directly connected to systems up to 690V AC or 500V DC. For higher voltages, Bender offers specific coupling devices (e.g., AGH series) to extend the monitoring range safely. Always consult the datasheet for specific connection diagrams.

Last Update: Friday, March 13, 2026

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