BENDER IR470LY-4021 Insulation Monitoring Device

BENDER IR470LY-4021 | Insulation Monitoring Device (IT Systems)

Specifications

• System Voltage (Un): AC/3(N)AC 0–793 V, DC 0–480 V; 50–400 Hz
• Insulation Range: 1–200 kΩ (adjustable)
• Alarm Thresholds:
  • Alarm 1: 10–100 kΩ
  • Alarm 2: 50–500 kΩ
• Supply Voltage (Us): DC 9.6–84 V; ≤3 VA
• Relay Outputs: 2 × changeover contacts (250 VAC, 5 A)
• Communication: Galvanically isolated RS-485 (BMS/Modbus RTU)
• Analog Output: 0/4–20 mA (isolated)
• Display: LED bar graph (insulation resistance)
• Operating Temp: -10°C ~ +55°C; Storage: -40°C ~ +70°C
• Mounting: DIN rail (35 mm)
• Weight: approx. 0.55 kg

Key Features

1. Broad Compatibility: Monitors AC, DC, and mixed systems up to 793 VAC
2. Dual Alarm & LED Indication: Two independent alarm levels; clear LED bar graph for resistance value
3. Isolated Interfaces: RS-485 and analog output galvanically isolated for noise immunity
4. Compact & Rugged: Industrial design for harsh environments; optional conformal coating
5. External Control: Terminals for external test/reset and standby function

Applications

• Medical IT systems (hospitals, operating rooms)
• Industrial drives, UPS, battery energy storage
• Marine, offshore, and mining installations
• Critical infrastructure requiring uninterrupted power