Overview
The AIM-D100-TS series DC insulation monitor is specifically engineered for unearthed DC systems (IT systems) in energy storage applications. It continuously monitors the insulation resistance of both positive and negative poles to earth, ensuring operational safety. When insulation resistance falls below preset thresholds, the device issues pre-alarm or alarm signals via RGB LED indicators and relay outputs. Designed for DC 15-1500V systems, it is ideal for battery energy storage systems, substation DC panels, EV charging stations, UPS systems, and photovoltaic DC networks. The monitor features dual trigger modes (communication or periodic), two relay outputs, and flexible rail or wall mounting with plug-in terminals.
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Wide Voltage Range for ESS
- DC 15-1500V (two models)
- TSL: 15-150V, TS: 150-1500V
- Perfect for battery storage systems
High Precision Insulation
- 1kΩ-10MΩ, accuracy ≤3%
- Response time 500ms or 1000ms
- System leakage ≤5μF
Dual Trigger Modes
- Communication trigger (default)
- Periodic trigger with adjustable delay
- Flexible for various applications
Compact with Relay Outputs
- 2 relay outputs, NO/NC selectable
- Rail or wall mounting
- RGB LED for status indication
Function
| Insulation Monitoring | Continuously measures insulation resistance of positive and negative poles to earth. Range: 1kΩ～10MΩ. Pre-alarm and alarm thresholds can be set independently |
| Voltage Monitoring | Real-time measurement of system voltage (pole-to-pole) and pole-to-earth voltages. Range: DC 15～1500V (model dependent). |
| Dual Alarm Indication | Two RGB LEDs indicate status: green (running), yellow (pre-alarm flashing), red (alarm flashing). Yellow flashing also indicates reverse polarity connection. |
| Relay Outputs | Two relay outputs (NO/NC selectable) for remote signalling: DO2 for pre-alarm, DO1 and DO2 for alarm. |
| DIP Switch Configuration | 8-position DIP switch allows easy setting of baud rate and communication address (1-63) without software |
| Dual Trigger Modes | Communication trigger (default): reading any measurement register initiates one insulation measurement. Periodic trigger: automatic measurement with adjustable delay (5-500s). |
| Flexible Mounting | Plastic enclosure supports both 35mm DIN rail mounting and wall mounting with pull-out mounting clips. |
| Plug–in Terminals | Plug-in terminal blocks simplify wiring and maintenance. |
| Low Power Consumption | Maximum power ≤3W, suitable for energy-sensitive applications. |
Specification
| Parameter | Value |
| Auxiliary Power | DC 12～36V |
| Max. Power Consumption | ≤3 W |
| Voltage Measurement Range | AIM-D100-TSL: DC 15～150V AIM-D100-TS: DC 150～1500V |
| Voltage Accuracy | Class 2.0 |
| Insulation Resistance Range | 1 kΩ ～ 10 MΩ |
| Pre-alarm / Alarm Setting Range | 10 kΩ ～ 10 MΩ |
| Insulation Accuracy | 1～10 kΩ: ±1 kΩ 10～500 kΩ: ≤3% |
| Permissible System Leakage Capacitance | ≤5 μF |
| Insulation Monitoring Time | 500 ms / 1000 ms per cycle (selectable) |
| Alarm Indication | RGB LEDs (green: run, yellow: pre-alarm, red: alarm) |
| Alarm Outputs | 2 relay outputs, NO/NC selectable |
| Contact Rating | AC 250V 5A / DC 30V 5A |
| Communication Interface | RS485, Modbus-RTU protocol |
| Baud Rate | 4800, 9600, 19200, 38400 bps (DIP switch selectable) |
| Communication Address | 1～63 (DIP switch selectable, default 1) |
| Insulation Monitoring Method | Communication trigger (default) or periodic trigger |
| Periodic Trigger Delay | 5～500 s adjustable (when in periodic mode) |
| Insulation Capacitance Time | 0～60000 ms adjustable (for systems >5μF) |
| Mounting | 35mm DIN rail or wall mounting (with clips) |
| Protection Degree | IP30 |
| Operating Temperature | –20 °C ～ +60 °C |
| Storage Temperature | –25 °C ～ +75 °C |
| Relative Humidity | <95% (non-condensing) |
| Altitude | <2000 m |
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FAQ
The series includes two models: AIM-D100-TSL for DC 15～150V systems and AIM-D100-TS for DC 150～1500V systems. Choose the model according to your energy storage system voltage.
Communication trigger (default): reading any measurement register initiates one insulation measurement, ideal for on-demand checking. Periodic trigger: automatic measurement with adjustable delay (5-500s), suitable for continuous monitoring.
It has two independent relay outputs. DO2 activates for pre-alarm, while both DO1 and DO2 activate for alarm. Relay mode (NO/NC) is configurable via register 44H.
No, the trigger mode is selectable via register 40H (0x01 for periodic, 0x10 for communication trigger). They cannot be used simultaneously.
An 8-position DIP switch on the device sets the baud rate (using BAUD1 and BAUD2) and the Modbus address (using ADD1-ADD6, binary coded). No software configuration is needed.
When in periodic trigger mode, register 3EH can be used to enable/disable the periodic trigger, and register 3DH reflects the current on/off status. This allows remote control of the monitoring cycle.
Summary
The AIM-D100-TS series DC insulation monitor is a specialized solution for energy storage systems, offering wide voltage coverage up to 1500V, high-precision insulation measurement, and dual trigger modes for flexible operation. With two relay outputs, RGB status indication, and DIP switch configuration, it provides reliable protection while being easy to integrate into battery storage, substation, and renewable energy applications. Its compact design, low power consumption, and dual mounting options make it an ideal choice for modern DC power systems requiring continuous insulation monitoring.
