ENMG / CABINET ENVIRONMENT
EAD
Intelligent cabinet dehumidifiers
Peltier dehumidifiers actively condense moisture from enclosed electrical cabinets and drain it outside through a 2 m tube. Digital monitoring, automatic/manual operation and RS485 support cabinet humidity management.
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Specifications & selection.
- 20 W, 40 W and 60 W models with built-in or external temperature/humidity sensors.
- Digital status and fault indication; retained start/stop settings after power loss.
- Selected models provide temperature control and an external-heater relay output.
- For switchgear, GIS control cabinets, outdoor terminal boxes and other enclosed electrical equipment.
| Model | Power | Temperature control / heater output | Sensor | Housing | Width × depth × height (mm) |
|---|---|---|---|---|---|
| EAD-2020R | 20 W | No / no | Built-in | Plastic | 71 × 51 × 87 |
| EAD-2040P | 40 W | Yes / yes | Built-in | Plastic | 98 × 60 × 136 |
| EAD-2060P | 60 W | Yes / yes | External | Plastic | 102 × 72 × 170 |
| EAD-2060PA | 60 W | Yes / yes | External | Aluminium alloy | 102 × 72 × 170 |
| Parameter | Published value |
|---|---|
| Supply | 100–240 VAC, 50/60 Hz in the text; diagrams show 220 VAC — confirm the exact unit |
| Internal supply input stated in text | 85–265 VAC; not a substitute for the assembled-unit rating |
| Nominal moisture removal | 100 mL/day at 25°C and 85% RH; confirm model-specific capacity |
| External heater range | 50–500 W, on models with heater output |
| Heater relay contact | 1 normally open contact; 5 A at 277 VAC / 5 A at 30 VDC |
| Dehumidifying temperature range | 5 to 45°C |
| Operating / temperature measurement range | −20 to +60°C |
| Humidity measurement range | 0–99.9% RH |
| Humidity accuracy | ±5% RH |
| Temperature accuracy | ±2°C |
| Dehumidification start setting | 75–85% RH; factory setting 85% RH |
| Heating start setting | 5–15°C; factory setting 5°C |
| Digital display resolution | 1.0, as stated in the source |
| Drain tube | Silicone; diameter 8 mm × length 2 m |
| Outline tolerance stated | ±0.5 mm; source notes manual measurement |
| Item | Published setting |
|---|---|
| Interface | RS485 half-duplex, A+ / B−; all four listed models |
| Protocol | Modbus RTU |
| Default serial configuration | 9600 bps, 8N1 |
| Device address | 1–247; default 1 |
| Maximum frame size | 256 bytes |
| Minimum interval before next frame | 200 ms |
| Suggested polling interval | At least 500 ms |
| Function 0x03 | Temperature at 0x0000; humidity at 0x0001; source examples use tenths |
| Function 0x01 | 8 status bits from 0x0000 |
| Bit | Meaning |
|---|---|
| 0 | Peltier cooling element fault |
| 1 | Temperature/humidity sensor fault |
| 2–4 | Reserved |
| 5 | Heater relay active |
| 6 | Manual dehumidification mode |
| 7 | Dehumidification active |
| Model | Supply terminals | RS485 A+ / B− | Heater relay | External sensor |
|---|---|---|---|---|
| EAD-2020R | 1 / 2 | 3 / 4 | Not provided | Built-in |
| EAD-2040P | 5 / 6 | 1 / 2 | 3 / 4 | Built-in |
| EAD-2060P | 9 / 10 | 4 / 5 | 6 / 7 | 1 blue / 2 brown / 3 black |
Selection & installation notes
- Mount vertically on DIN rail with the drain outlet downward. Leave more than 50 mm clear in front of the fan; keep all air openings unobstructed. Route the drain outside the cabinet without kinks or coils.
- The supply text and wiring graphics differ. Confirm the assembled unit’s voltage label before energizing; do not assume every revision accepts the internal power module’s full range.
- The source’s byte-order instructions, negative-temperature conversion and sample status interpretation contradict its examples. Obtain a confirmed firmware-specific protocol; do not implement the inconsistent example frames as published.
- The source mentions a humidifier output in prose but does not show it in the verified selection/terminal diagrams. Do not assume this output is available.
- Use the exact heater-output rating and verify EAD-2060PA terminal assignments separately; its terminal diagram is not shown.
- The coding graphic includes 80 W, wireless and stainless-steel options outside the four-model table. Confirm these options separately rather than constructing unverified part numbers.
- Keep the drain and vents clear. Avoid chemical gases and contaminated environments. Use shielded twisted-pair RS485 cabling away from power cables, with the bus arrangement and termination specified in the confirmed manual.
Based on the official Chinese product page and selection charts ↗. Checked 2026-09-15. Confirm the current specification for the exact model when ordering.
TECHNICAL RESOURCES
Plan your integration.
EAD intelligent dehumidifier — English technical specification, YZ25H26.
Check the technical specification against your exact model and firmware revision before wiring or communication setup.