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SKU: ST-GQ-IMD
Controllers
Solterra GQ-IMD — Insulation Monitoring Device (IMD) for EV Charging
Standards-Compliant, Interoperable, Real-Time.
High-voltage insulation monitoring device (IMD) for EVs and EV chargers — dynamic isolation-resistance monitoring, ±1000 V measurement, CAN 2.0B reporting, –40 to +105 °C, ISO 6469-3 / UL 2231 compliant.
HV isolation monitoring (ISO 6469-3)
±1000 V measurement
CAN 2.0B status reporting
–40 to +105 °C automotive
UL 2231 / IEC 61557 compliant
Technical Specifications
INPUT
6–36 VDC supply, ≤500 mW; startup 4 s
OUTPUT
Isolation 0–2.7 MΩ · HV ±1000 V (±1%) · PWM + fault outputs
COMMS
CAN 2.0B, 125 kbps–1 Mbps; CAN ID 0x18FF5050 @ 100 ms
Detailed Specifications
PARAMETERS
| PARAMETER | VALUE |
|---|---|
| Function | Insulation Monitoring Device (IMD) |
| Supply Voltage | 6–36 V |
| Supply Power | ≤500 mW |
| Startup Time | 4 s (typ) |
| Operating Temperature | -40 to +105 °C (automotive) |
| Isolation Resistance Range | 0–2.7 MΩ |
| Isolation Monitoring Uncertainty | 5% |
| Isolation Calculation Period | 0.5 s (typ) |
| Short-Circuit Flag Threshold | <5 kΩ |
| HV Measurement Range | ±1000 V |
| HV Measurement Error | ±1% |
| HV Measurement Resolution | 0.1 V |
| Temperature Measurement Accuracy | ±2 °C |
| Temperature Measurement Resolution | 0.1 °C |
| Dimensions (W×D×H) | 100 × 53 × 17 mm |
| Compliance | ISO 6469-3:2011-12, UL 2231-1/-2, IEC 61557, CFR 571.305 |
INTERFACE
| INTERFACE | VALUE |
|---|---|
| CAN | CAN 2.0B, 125 kbps–1 Mbps, high-side; CAN ID 0x18FF5050 @ 100 ms |
| PWM Output | Duty 0–100% (∝ isolation resistance), user-set frequency, max 2.5 A |
| Fault Output | High-side, max 2.5 A, user-set output level |
| HV Battery + | Molex 5566-02A (2-pin) |
| HV Battery − | Molex 5566-02A (2-pin) |
| Control Connector | Molex 5566-10A (10-pin, 5557 series mating) |
| CAN ID | SW1 DIP switch (00–11) |
PROTECTIONS
| PROTECTION | DESCRIPTION |
|---|---|
| Isolation Warning | Flagged when isolation resistance < 500 Ω/V |
| Isolation Fault | Flagged when isolation resistance < 100 Ω/V |
| Low Battery Voltage | Flagged when HV battery < 50 V |
| High Battery Voltage | Flagged above max working voltage |
| Hardware Error / High Uncertainty | Reported via CAN status byte (uncertainty > 5%, hardware fault) |
FEATURES
| FEATURE | VALUE |
|---|---|
| CAN reporting | Isolation status, temperature, HV+ (Rp) & HV− (Rn) resistance, HV battery voltage |
| Earth connection | Earth1 & Earth2 both bonded to chassis GND (required for measurement) |
| Mounting | Mounting hole to charger/vehicle chassis |
Additional Details
The GQ-IMD is a high-voltage insulation monitoring device (IMD) for EVs and EV chargers. It dynamically monitors isolation resistance and reports isolation status, HV battery voltage, per-rail (HV+/HV−) resistance and temperature over CAN 2.0B, across the automotive –40 to +105 °C range. Designed to comply with ISO 6469-3:2011-12, UL 2231-1/-2, IEC 61557 and CFR 571.305.
Installation: both Earth1 and Earth2 must be connected to chassis GND, otherwise the system cannot measure insulation resistance correctly.
