Description
The Bender IRDH575B1-435 A-ISOMETER Insulation Monitoring Device is an advanced insulation monitoring controller designed for ungrounded IT electrical systems. It continuously measures insulation resistance between the active conductors and protective earth (PE), providing early detection of insulation deterioration and electrical safety risks in AC, DC, and mixed AC/DC networks.
The IRDH575B1-435 is suitable for industrial power systems, marine electrical networks, medical power supplies, renewable energy systems, and critical automation installations where continuous insulation monitoring is required. It supports AC and 3(N)AC systems from 20 V to 575 V and DC systems from 20 V to 575 V, with integrated alarm relays and RS-485/BMS communication for system integration.
IRDH575B1-435
📋 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | Bender |
| Model | IRDH575B1-435 |
| Series | A-ISOMETER IRDH575 Series |
| Product Name | Insulation Monitoring Device |
| Application | IT System Insulation Resistance Monitoring |
| Rated System Voltage | AC 3(N)AC 20…575 V / DC 20…575 V |
| Power Supply | AC 88…264 V / DC 77…286 V |
| Measuring Range | 1 kΩ…10 MΩ |
| Alarm Outputs | 3 Changeover Relay Contacts (K1/K2/K3) |
| Communication Interface | RS-485 / BMS Protocol |
| Display | Four-Line Illuminated LCD Display |
| Measuring Voltage | ≤40 V |
| Measuring Current | ≤220 μA |
| Power Consumption | ≤14 VA |
| Mounting Type | Panel Mounting |
| Dimensions | Approx. 144 × 96 × 75 mm |
| Weight | ≤900 g |
| Protection Rating | IP30 (Internal), IP40 Panel Mounting |
| Country of Origin | Germany |
| Condition / Status | Used – Verify Physical Unit |
⚙️ Product Features
🔹 Continuous Insulation Monitoring – Continuously checks insulation resistance in ungrounded electrical systems to identify insulation faults before equipment damage occurs.
🔹 Wide Voltage Application – Supports AC, 3-phase AC, and DC IT systems with voltage ranges up to 575 V.
🔹 Alarm Relay Functions – Provides configurable alarm outputs for insulation faults, device errors, and optional insulation fault location functions.
🔹 RS-485 Communication – Allows connection to Bender BMS networks for remote monitoring and integration with automation systems.
🔹 LCD Display Interface – Integrated display provides insulation resistance values, alarms, and configuration information.
🔹 Industrial Safety Application – Commonly used in marine systems, power distribution, industrial automation cabinets, and critical electrical installations.
🔹 Panel Mount Design – Designed for installation in electrical control cabinets and monitoring panels.
❓ Common Questions & Answers
Q1: What is the Bender IRDH575B1-435?
A: It is an A-ISOMETER insulation monitoring device used to continuously measure insulation resistance in ungrounded IT electrical systems.
Q2: What systems can the IRDH575B1-435 monitor?
A: It can monitor AC, 3(N)AC, and DC systems within the specified voltage range of 20 V to 575 V.
Q3: What happens when insulation resistance becomes too low?
A: The device activates configured alarm outputs to notify operators of insulation deterioration or insulation faults.
Q4: Does the IRDH575B1-435 support communication?
A: Yes. It includes an RS-485 interface using the Bender BMS communication protocol for integration with monitoring systems.
Q5: Is this device a PLC module?
A: No. It is a dedicated electrical safety monitoring device, not a general-purpose PLC controller.
Q6: What should be checked before replacement?
A: Verify the complete model number, voltage range, supply voltage, relay configuration, communication settings, and existing panel wiring.
Q7: Where is the IRDH575 commonly used?
A: Typical applications include marine power systems, industrial control panels, generator systems, and critical electrical installations.
⭐ Recommended Bender Models
- IRDH575B1-427 – A-ISOMETER Insulation Monitoring Device
- IRDH575B2-435 – High Voltage Insulation Monitoring Device
- IRDH275-427 – Insulation Monitoring Device
- IRDH275B-435 – A-ISOMETER Series Monitor
- iso685-D – Modern Insulation Monitoring Device
- iso685-S – Insulation Monitoring Device with Communication
- EDS440-L – Insulation Fault Evaluation System
- EDS460-D – Insulation Fault Locator
- RCMS460-D – Residual Current Monitoring System
- COMTRAXX CP9xx – Condition Monitoring Interface
