Overview
The EDK-908 is the driver's-door control panel on a commercial-vehicle cab. It brings the functions a driver reaches for from the door armrest into one switch: raising and lowering the windows, locking and unlocking the doors, and aiming and heating the exterior mirrors. It switches those loads directly on its own connector outputs — window up / down, central-lock lock / unlock, mirror-adjust direction drives and mirror defrost — and adds a single LIN data line so the panel can also sit on the cab's low-speed network alongside a body or door controller.
Electrically it is specified as a durable cabin switch: a 24 V rating with an 18 – 32 V working window, a quiescent draw held to ≤ 7 mA so it does not load a parked battery, and a voltage drop kept to ≤ 200 mV. Five-way protection — over-voltage, over-current, short-circuit, over-temperature and motor-stall — guards the switch and the loads it commands. The 5 ± 1.5 N key force gives the positive press a driver expects, and the panel is qualified to more than 50,000 operations.
One panel for windows, locks and mirrors
What defines the EDK-908 is that window, lock and mirror control share one panel. The window-lift keys travel ±12°, the central-lock and mirror-adjust keys ±8°, and the mirror-select and heat key uses a short 1.8 mm contact travel. The panel switches each function on its own output line and carries a LIN data line, so it can drive its outputs locally or report on the cab network where a programme centralises door logic. That is the same door-side pattern described in the switches & sensors technical guide: interior door, window and mirror switching runs on short hard-wire outputs and low-speed networks like LIN off a body-adjacent door controller, because the bandwidth requirement is low and the loads are local to the door.
On programmes that centralise door and window functions in a dedicated body module, the EDK-908 can be specified alongside a door & window control module such as the EBX-2163 — the switch panel provides the driver-facing controls, and the exact split between the switch's own outputs and networked signalling is confirmed per programme against the module's interface. Where the cab keeps its door logic local, the EDK-908 drives its window, lock and mirror outputs on its own connectors.
Interface & connectors
The EDK-908 uses two harness connectors. An 8-way connector (KET terminal family) carries the 24 V feed and ground, the LIN data line, and the direct outputs for window up / down, central-lock lock / unlock and mirror defrost. A 10-way connector (DJ7101 series) carries the mirror-adjust drives — a common return with the left / right and vertical / horizontal direction lines — together with the ACC feed, key-insert sense and turn-signal sense lines used for door-side logic. Exact pin assignment, terminal part numbers and which functions are wired for a given cab are confirmed on the drawing at RFQ, so the panel can be matched to either a local door harness or a networked door module.
EDK-908B variant
The EDK-908B is a variant of the same door-and-window control switch, offered for programmes that need a different key map, legend set or connector arrangement on the same electrical envelope. It is quoted per programme against the same door-controller interface; share your target key layout and connector at RFQ and we confirm the exact EDK-908 or EDK-908B build for your cab.
Durability & environment
The 50,000-operation rating suits a control used many times a day across years of service while holding its key feel and clean contact. The −30 to +85 °C working range, with storage down to −40 °C, covers cabs that cold-soak overnight in winter depots as well as those working through hot, humid summer duty. As a door-panel interior control the EDK-908 carries IP54 sealing for the protected cabin environment — dust-protected and guarded against splashing water — rather than direct immersion. Confirm the panel cut-out, key legend set and connector orientation with us at quotation.
Compliance
The EDK-908 has been validated against major China heavy-truck OEM EMC requirements. Programme-specific requirements — material declarations, customer standards and destination-market approvals — are confirmed on a project basis and available upon project requirement; a declaration of conformity is available on request as part of the PPAP package. Key legends and the backlight scheme are specified per programme.
Manufacturing & testing
Built under IATF 16949 with APQP project planning and a PPAP package available for OEM programmes. End-of-line and sample testing typically covers contact make / break on each key, LIN communication, contact voltage drop, operating force against the 5 ± 1.5 N window and connector retention, with the specific test plan agreed per programme. Endurance to the 50,000-operation window is verified on a sample basis in our in-house lab when a programme requires fresh validation.
How to ask
The EDK-908 belongs to the Switches & Sensors family. For how the switch panel fits with the control module, the BCM and anti-pinch across the door comfort group, see the power window & door control module buyer guide. For the door & window control module it can pair with on networked programmes, see the EBX-2163 door & window control module; for a dedicated mirror switch, the EDK-2319 powered side-mirror switch. To request the connector pinout, the panel cut-out, the key legend set or a fleet-grade batch quotation, please use the contact page with your target vehicle programme, expected annual volume, and key requirements (12 V or 24 V system, LIN or hard-wire preference, mirror-heat channel, legend language, connector preference). Drawings welcome.
