Technical Specifications
- Product Model: ISO685
- Brand: BENDER (ISOMETER® Series)
- Warranty: One Year
- Input Voltage: AC/DC 24–240 V, 47–460 Hz
- Operating Temperature: -20°C ~ +60°C (Standard Version)
- Storage Temperature: -40°C ~ +70°C
- Response Time: Typical ≤ 4 s (DC insulation alarm)
- Protection Class: IP20, DIN rail cabinet mounting
- Accuracy Class: ±15% of set response value (per IEC 61557-8)
- Output Frequency: N/A
- Rated Current Range: Typical power consumption 7.9 W
- Communication Interface: RJ45 Ethernet, RS485 terminal bus, galvanically isolated analogue output
- Supported Protocols: Modbus TCP, Modbus RTU, BCOM, built-in web server
- Overload Capacity: Measuring circuit overvoltage protection, measuring cable line break monitoring
- Dimensions (W×H×D): 144 mm × 110 mm × 120 mm, standard DIN rail form factor
Product Overview
The BENDER ISO685 is an advanced ISOMETER® insulation monitoring device designed for continuous supervision of unearthed IT AC, DC and mixed AC/DC power networks. This DIN rail instrument tracks insulation resistance between live conductors and ground, detecting slowly developing earth faults before leakage currents escalate into equipment damage or safety hazards. Electrical engineers, marine technicians and maintenance teams managing critical IT power systems rely on BENDER insulation monitoring technology to minimise unplanned shutdowns. The unit supports networks containing inverters, rectifiers and variable frequency drives, delivers visual trending data and alarm logging, and integrates seamlessly into PLC and SCADA automation architectures for permanent electrical safety supervision. (Word count: 171)
Key Functions
- Continuous Insulation Resistance Measurement: The device utilises AMP®Plus measurement technology to reliably monitor floating power networks. Two independently configurable alarm thresholds (1 kΩ – 10 MΩ) enable early warning and critical fault alert stages for progressive insulation degradation.
- Integrated Trend Visualisation & Event Logging: The graphical LCD supports isoGraph trend display, while internal memory stores up to 1023 timestamped alarm records. Historical data simplifies post-fault analysis and supports predictive maintenance planning.
- Multi-Interface System Integration: Ethernet and RS485 communication ports enable bidirectional data exchange with supervisory control systems. Galvanically isolated analogue outputs convert insulation resistance readings into standard 4–20 mA signals for local indicators and recording equipment.
- Comprehensive Self-Diagnostic Capabilities: Automatic device self-test and measuring cable break detection continuously verify circuit integrity. Built-in monitoring flags wiring faults or internal hardware anomalies to avoid blind-spot safety risks in IT distribution networks.
