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Compare B19, B27, B25L, ME and DK VRF gateways by system topology, HVAC interface and control configuration. Request compatibility checks and B2B project support.
Compare B19, B27, B25L, ME and DK VRF gateways by system topology, HVAC interface and control configuration. Request compatibility checks and B2B project support.
Start with the complete indoor and outdoor models and system topology. Choose centralized or single-indoor-unit control, then check the connection, original controller and target platform. ACMELEC confirms the matched configuration before samples or quotations.
Five gateway routes
Choose the installation architecture first, then match the HVAC interface and required control configuration. The options below belong to specific models and ordered versions.
On smaller screens, swipe the table horizontally to compare all five models.
| Selection point | B19 | B27 | B25L | ME | DK |
|---|---|---|---|---|---|
| Control architecture | One gateway for multiple indoor units on a supported shared system bus. | One gateway per indoor unit. | One gateway per indoor unit. | CN105 module at the confirmed Mitsubishi Electric indoor unit. | P1/P2 module on the confirmed Daikin indoor-unit controller route. |
| HVAC connection | Matched indoor or outdoor communication bus; brand and model dependent. | Matched indoor-unit terminals and brand firmware. | Matched indoor-unit terminals and brand firmware. | Mitsubishi Electric CN105; full tested model and suffix must match. | Daikin P1/P2, non-polarized two-wire connection. |
| Control configuration | The supplied manual covers Aqara Zigbee through a compatible hub. Request matched documents for BMS/Modbus or KNX requirements. | RS485, Zigbee, BLE or WiFi options depend on the ordered version and host platform. | RS485; UART for optional third-party WiFi, Zigbee or BLE modules. Confirm the application protocol. | WiFi; Zigbee; Modbus; WiFi + Modbus; Zigbee + Modbus. | Tuya Smart / Smart Life over 2.4 GHz WiFi. |
| Controller and hub | No additional thermostat for the supported direct-bus route. Aqara integration needs a compatible hub. | Original wired-controller coexistence varies by HVAC model and settings. | Original-panel coexistence only on supported routes; automatic master/slave adaptation requires HVAC support. | Original-controller retention depends on the confirmed installation. Zigbee versions need a matched Tuya hub. | Can retain the compatible original wired controller in parallel. |
| Size and placement | 106 × 96 × 57 mm; accessible DIN-rail or control-box installation. | 51 × 53 × 17 mm; suitable back box or indoor-unit service space. | 85 × 85 × 28 mm; indoor-unit service opening or indoor smart-control box. | 68 × 58 × 25 mm; beside the confirmed indoor-unit control board. | 74 × 37 × 23 mm; beside the compatible P1/P2 control route. |
| Power reference | DC 12 V; 2.0 W. | Compatible indoor-unit supply; average 0.5 W. | Compatible indoor-unit supply; average 0.5 W. Auxiliary output: DC 8.5 V, maximum 0.7 W before module consumption. | Compatible CN105 interface supplies power and communication. | Follow the matched DK installation and wiring instructions. |
| First selection check | Full system topology, bus layout, device count and target hub/BMS. | Indoor-unit model, terminals, original controller and commissioning access. | Full indoor-unit model, connector, original panel, target host and WeChat commissioning access. | Complete indoor-unit model and suffix, CN105 photo and required configuration. | Indoor-unit model, P1/P2 terminals and existing wired controller. |
| Manual and matching | B19 manual Check B19 compatibility | B27 manual Check B27 compatibility | B25L manual Check B25L compatibility | ME manual Check ME compatibility | DK manual Check DK compatibility |
Compatibility depends on the complete equipment models, connection and configuration. Read the B19, B27 and B25L architecture guide for gateway allocation examples.
Related products
AcmeLink VRF Gateway
One gateway for multiple indoor units on a supported VRF system. Connect to the matched indoor or outdoor bus; no additional thermostat required.
AcmeLink VRF Gateway
One gateway per indoor unit. Compact 51 × 53 × 17 mm housing for concealed installation, with WeChat Bluetooth brand-adaptation upgrades.
AcmeLink VRF Gateway
One gateway per indoor unit, in an 85 × 85 × 28 mm square housing. RS485 and optional wireless modules, with WeChat Bluetooth firmware upgrades.
AcmeLink VRF Gateway
CN105 gateway for selected Mitsubishi Electric indoor units. Choose WiFi, Zigbee, Modbus, WiFi + Modbus or Zigbee + Modbus; confirm the full model and required functions.
AcmeLink VRF Gateway
Non-polarized P1/P2 gateway for compatible Daikin VRV/VRF indoor units. Retain the compatible original wired controller and add Tuya Smart Life WiFi control.
For multiple indoor units on a supported shared bus, explore the B19 centralized VRF gateway. For a compact module at each indoor unit, explore the B27 single-indoor-unit gateway.
Compare AcmeLink ME WiFi, Zigbee and Modbus configurations for confirmed compatible indoor units. For an existing original WiFi interface or a BMS project, use the Tuya alternative and integration guide to prepare the model and function requirements before requesting a sample.