ACREL 100-1000 V DC Dual Channel Insulation Resistance Monitor
ACREL 100-1000 V DC Dual Channel Insulation Resistance Monitor is a dual-channel DC insulation monitor designed for unearthed DC systems used in dual-gun electric vehicle charging stations. It independently monitors insulation resistance and voltage across two DC circuits, with configurable pre-alarm and alarm thresholds. Supporting DC 100-1000 V systems, RS485 Modbus-RTU communication and communication-triggered measurement, it is suited to EV charging equipment, energy storage systems and other DC power applications where insulation condition needs to be monitored.
The ACREL 100-1000 V DC Dual Channel Insulation Resistance Monitor is designed for unearthed DC systems, particularly dual-gun EV charging equipment where two independent DC circuits need to be monitored separately.
Each channel monitors the insulation resistance between the positive and negative conductors and earth. The device also measures system voltage and provides separate status indication for each channel using RGB LEDs.
The monitor supports DC 100-1000 V per channel and an insulation resistance measurement range of 1 kΩ to 10 MΩ. Pre-alarm and alarm thresholds can be configured independently for each channel within the specified setting range.
How it works
- The two channels independently monitor insulation resistance between the DC conductors and earth.
- System voltage and pole-to-earth voltages are measured for each channel.
- A Modbus communication read command triggers an insulation measurement cycle for the corresponding channel.
- RGB LEDs provide separate operating, pre-alarm and alarm status indication.
- An 8-position DIP switch is used to configure the communication baud rate and Modbus address.
Why choose this product
- Two independent monitoring channels - Suitable for dual-output or dual-gun DC charging equipment where each circuit requires separate monitoring.
- Wide DC measurement range - Supports DC 100-1000 V per channel.
- Modbus communication - RS485 with Modbus-RTU provides a practical interface for connection to a suitable monitoring or control system.
- Communication-triggered measurement - Measurement is initiated through communication, helping minimise the monitor's impact on the DC system.
- Flexible installation - The enclosure supports 35 mm DIN rail or wall mounting.
- Low power consumption - Maximum power consumption is specified as ≤6 W.
Benefits
The ACREL 100-1000 V DC Dual Channel Insulation Resistance Monitor allows two independent DC circuits to be monitored using one compact monitoring device. Independent thresholds and status indication make it easier to identify the condition of each channel, while Modbus communication allows measurement information to be accessed by a compatible supervisory or control system.
Its communication-triggered operating method is particularly suited to applications where insulation measurements are required without continuously connecting the measurement circuit to the DC system.