Also searched as: servo motor control box supplier, VFD control panel for industrial doors, servo drive controller OEM
The servo control box is the “brain” of a precision door-operator system: it houses the variable-frequency drive (VFD) or servo controller that regulates motor speed, torque and position. Unlike conventional on/off or star-delta starters, a servo VFD delivers soft start/stop, precise speed profiling and real-time fault diagnostics — critical for high-cycle industrial doors where mechanical shock shortens belt, spring and track life [ESTIMATE — industry-typical]. In the high-speed door segment, servo control is the de-facto standard: BFT’s D-Track intelligence on gate operators, for example, continuously monitors torque to detect obstructions [SOURCED: bft-automation.com — ESTIMATE for D-Track specifics].
RAX Door Technology is a servo control box manufacturer with a genuine differentiator: an in-house servo motor assembly line paired with the control box, so motor and drive are calibrated as a matched system — not sourced separately and hoped to work together. WiFi/RS485 remote control, radar/geomagnetic/light-curtain sensor inputs, and explosion-proof (Ex d IIB T4) motor compatibility are all integrated on the same board. CE conformity to EN 13241 and EN 12453, validated in our 100,000-cycle fatigue test lab. From a single sample unit, full flexibility on order quantity.
RAX builds both the servo motor and the control box in-house — the VFD parameters are calibrated to the motor’s torque/speed curve at the factory, eliminating field-commissioning guesswork.
Servo VFD drive eliminates the mechanical shock of direct-on-line starts, extending belt, spring and track life — especially important at high cycle counts.
On-board inputs for radar, geomagnetic loop, light curtain, safety edge and photocell — all wired to EN 12978 protective-device practice. WiFi / RS485 for BMS integration [RAX].
Control board supports RAX’s explosion-proof motor variant (Ex d IIB T4) for use in paint booths, grain silos and chemical storage areas [RAX].
| Product | Servo Control Box (servo motor controller / VFD control panel for industrial door operators) |
| Drive type | Servo VFD (variable-frequency drive) with closed-loop speed/torque control; soft start/stop standard [RAX]. |
| Supply voltage | 230 V AC single-phase (standard); 380 V AC three-phase for heavy industrial operators [ESTIMATE]. Confirm per motor pairing. |
| Motor compatibility | Matched to RAX in-house servo motor assembly line; also compatible with third-party servo motors on request — send motor datasheet for parameter mapping [RAX]. |
| Control & connectivity | WiFi (2.4 GHz) / RS485 bus for remote command and status; dry-contact I/O for BMS; RF remote receiver (433 MHz) integrated [RAX]. |
| Sensor inputs | Radar detector, geomagnetic loop, light curtain, safety edge, photocell — all inputs on-board, pre-wired connectors [RAX]. |
| Safety functions | Obstruction detection (torque monitoring), adjustable force limits per EN 12453, emergency stop input, fail-safe brake output [RAX]. |
| Enclosure | IP54 painted steel enclosure standard; IP65 available for outdoor or washdown installations [ESTIMATE]. |
| Certification | CE: EN 13241 (door system) + EN 12453 (operator safety). EMC per EN 61800-3 (adjustable speed drives) [ESTIMATE]. |
| Warranty / service | Operator/motor 3 years, servo motor 5 years; free spare parts within warranty via DHL/FedEx (5–7 days). |
| Order | Custom engineered to your exact opening, specification and RAL color |
Figures marked [ESTIMATE] are industry-typical conventions, not RAX test data; RAX’s own model-level datasheets are confirmed per inquiry. RAX figures are from the approved brand brief.
Motor model, power rating (kW), voltage and torque curve — the basis for VFD parameter mapping. RAX servo motors ship pre-calibrated.
Door type (high-speed / roller / sectional), weight, cycles/day and environment — determines VFD duty rating and enclosure IP class.
Which sensors (radar, loop, light curtain, safety edge) and how many — we pre-wire connectors and configure inputs before dispatch.
WiFi app control, RS485 bus protocol (Modbus), dry-contact I/O for BMS, or standalone RF remote — confirm per site.
RAX supports full private-label production of the Servo Control Box: custom enclosure color, logo printing, firmware branding (boot screen / app label), packaging printing and installation-manual translation (EN/ES/FR/AR/RU). Start with an OEM sample and scale to container-load branded production. Custom molds, Tooling records are archived for up to 5 years — no extra tooling fee on repeat orders, all under strict NDA (27-year zero-leak record). Standard lead time 12–20 days per container; FOB Tianjin / Qingdao, FCL & LCL supported.
Product standard for industrial, commercial and garage doors and gates — the harmonized basis for CE marking; references EN 12453 and EN 12978.
Safety in use of power-operated doors — force limits, obstruction detection and test methods that the servo control box must enforce.
Adjustable speed electrical power drive systems — EMC product standard for VFDs; emission and immunity requirements [ESTIMATE].
Design and testing of protective safety devices (safety edges, light curtains) and mechanical test methods referenced by EN 13241.
A servo control box combines a VFD (variable-frequency drive) with closed-loop servo control — it continuously monitors motor position, speed and torque via an encoder feedback loop, enabling precise positioning and repeatable speed profiles. A standard VFD only adjusts frequency/voltage in open loop. For high-speed industrial doors, servo control delivers smoother starts, accurate stop positions and better obstruction detection.
Yes. While RAX control boxes are calibrated in-house for RAX servo motors (ensuring optimal matching), they can also be parameterized for third-party servo motors. Send the motor datasheet (torque curve, encoder type, voltage rating) and our engineers map the VFD parameters accordingly.
The RAX servo control box has on-board inputs for radar detectors, geomagnetic loop sensors, light curtains, safety edges and photocells — all with pre-wired connectors for plug-and-play installation. WiFi and RS485 connectivity are also integrated for remote monitoring and BMS integration.
Yes. RAX offers an explosion-proof motor variant rated Ex d IIB T4, and the servo control box is fully compatible with this motor. The combination is suitable for paint booths, grain silos, chemical storage and other hazardous-area installations.
RAX holds ISO 9001:2015 and CE to EN 13241 (industrial door) and EN 12453 (operator safety), with SGS material reports and product liability insurance. The EMC standard for adjustable-speed drives is EN 61800-3; AS/NZS 4505 (Australia) and UL (North America) counterpart test data can also be supported.
Sample 7–15 days; standard container 12–20 days; custom first order 20–35 days (repeat 15–20). Operator/motor warranty is 3 years (servo motor 5 years), with free spare parts dispatched by DHL/FedEx within warranty (5–7 days).
Or email info@raxdoor.com
Send your motor model, door type and duty requirements — we reply with a matched proposal, wiring diagrams and lead time.
