24V Dump-Truck Body Controller (Top-Cover + Tail-Gate + Lift + PTO + Weighing, RF + APP remote)

Overview

The EBX-963 is the EBX family's dedicated dump-truck / tipper body-side controller — the ECU that runs the four function groups specific to the dump-truck programme that a general-purpose BCM does not cover: top-cover automation (the rolling / sliding bed cover that closes during haul and opens during loading / tipping), tail-gate automation (the rear gate that opens to let the load discharge during tipping), lift / PTO automation (the hydraulic-lift solenoid that raises the bed plus the power-take-off solenoid that engages the hydraulic pump), and 2-channel load-cell weighing (the C6 + C8 analog channels from the bed-mounted load cells, summed and CAN-published as the live bed load).

The controller is validated against the customer's construction-machinery EMC specification, aligned with the de-facto reference profile used across the Chinese construction-machinery sector; programme-specific EMC compliance scope (test items, severity levels, observation criteria) is confirmed against the customer's own EMC matrix at quotation. The 433 MHz RF receive path supports the supplied 2-button remote key, so the driver can operate the top-cover or the tail-gate from beside the vehicle during the tipping operation without needing to be in the cab; a configurable APP-side remote-control path lets a fleet back-end command the same functions over the programme's telematics box (typical pairing: the EBX-2054 T-BOX upstream).

Function group walk-through

1. Top-cover open / close / position-limit chain

Three dedicated solenoid drive channels and three position-limit switch inputs run the top-cover automation:

• A2 — top-cover open solenoid drive (high-side relay drive into the open-direction valve)
• A3 — top-cover close solenoid drive (high-side relay drive into the close-direction valve)
• A1 — lift-and-control horizontal switching solenoid drive (the directional-control valve that selects between the top-cover hydraulics and the lift hydraulics on a shared hydraulic circuit)
• A18 / A19 / A20 — top-cover position-limit switches — S1 (home), S3 (raised-limit), S2 (closed-limit) inputs that close the position-closed-loop; the controller stops the corresponding drive on limit-reached
• A15 / A16 — top-cover open switch input + close power input — driver-side or remote-side commanded open / close request
• B9 — reserved top-cover input 4 for programme-specific extension (e.g. partial-open mode)

2. Tail-gate automation (left + right + air-blow)

• A7 / A8 — tail-gate left / right open output (independent drives so the gate can open straight or unbalanced if the load is uneven)
• A5 — tail-gate air-blow solenoid drive (the air-blow valve that ejects residual material from the gate seam after the gate opens)
• B6 / B7 — tail-gate left / right switch inputs

3. Lift / PTO sub-system

• A6 — lift solenoid drive (the lift-direction valve that raises the bed)
• A4 — switching-type PTO solenoid drive (the power-take-off engagement valve that engages the hydraulic pump from the transmission take-off)
• A17 — PTO switch input (the in-cab PTO engagement switch — safety-interlock-gated)

4. 2-channel load-cell weighing

• B1 / B2 — load-cell C6 / C8 analog input (the two analog channels from the bed-mounted load-cell pair); the controller pre-processes the analog readings and publishes the live bed-load on CAN for the cluster / fleet back-end

5. Safety / emergency / zone-specific inputs

• B3 — emergency switch input (cut-out for the entire body-side hydraulic sub-system)
• B4 — zone-specific switch input (geofence / zone-permission switch — the body-side automation can be disabled when the vehicle is outside a permitted operating zone)
• B5 — pressure switch input (hydraulic-pressure threshold detection — cuts the lift drive if the hydraulic pressure exceeds the safe ceiling)
• B8 — reserved switch input 4 for programme-specific safety chain extension

6. Network & remote-control

• B11 / B12 — CAN-L / CAN-H — programme-defined message catalogue (CAN protocol confirmed per program; J1939 family typical for 24 V construction-machinery programmes)
• 433 MHz RF receive path — supports the supplied 2-button remote key (open / close); the controller's RF receiver demodulates the ASK-modulated burst and the firmware pairs against the learned key ID
• APP-side remote-control — fleet-back-end commands route over the programme's telematics box (typical pairing: the EBX-2054 T-BOX upstream) onto CAN, and the EBX-963 subscribes to the command messages

Engineering details

• Four-fold safety protection on each high-current drive channel — particularly important on the solenoid-valve drive channels where a stuck-valve is the routine fault mode and the protection envelope keeps a single-valve fault from taking out the rest of the body-side automation
• Drive-channel mix: 3 × high-side relay-coil drive + 1 × low-side relay-coil drive + 2 × chip-level high-side drive — lets the programme allocate the relay-side drive to the higher-current solenoid valves (lift, top-cover) and the chip-level drive to the lower-current accessory loads
• 15 × digital switch inputs + 2 × analog inputs — covers the full body-side switch / sensor inventory of a typical dump-truck programme on a single ECU
• 433 MHz RF receive path with learn-mode pairing — the programme can pair a new remote key without an external tool, per the programme's key-management policy
• APP-side remote-control over CAN — via the programme's telematics box; the EBX-963 has no direct cellular WAN on board (intentional, to keep the controller in the body-side safety scope rather than in the connectivity scope)
• Construction-machinery OEM EMC compliance — the controller has been validated against the customer's EMC specification, aligned with the de-facto reference profile used across the Chinese construction-machinery sector; programme-specific scope confirmed at quotation
• Free-orientation mounting; compact 132 × 91 × 32 mm body for a sheltered chassis-side bracket near the hydraulic-valve manifold — the IP53 housing wants a position shielded from direct wash-down / road-spray, so specify a sealed-connector variant at quotation if the bracket is exposed

Mechanical layout

Construction (PA66-GF15 + FR-4 PCBA + 2-button remote key)

32-pin pin-out reference (connector A + connector B)

The standard build lands all signals across the two sealed TYCO connectors per the reference pin-out below. Final pin allocation is confirmed against the customer harness drawing at quotation.

Comparison with other Youlai construction-machinery modules

The EBX-963 is the right choice for a dedicated dump-truck / tipper programme that wants one ECU to own the body-side automation (top-cover, tail-gate, lift, PTO, weighing) plus driver-out-of-cab remote control over both the 433 MHz RF key and the fleet-back-end APP. For a general-purpose 24 V BCM, look at EBX-952; for a configurable analog-input-rich BCM that can absorb a custom sensor pack, look at EBX-2510.

Manufacturing & testing

Built under IATF 16949 with APQP project planning and a PPAP package available for OEM programmes. Every unit is end-of-line functional-tested before packaging — the 3 + 1 + 2 = 6 drive channels (each across full-on / full-off / current-limit trip), the 15 digital switch inputs, the 2 analog load-cell inputs across the full input range, the 433 MHz RF receive path with a paired test key, the +12 V auxiliary output rail, the CAN bus health and the four-fold safety-protection envelope (over-voltage / over-current / short-circuit / over-temperature trip and recovery) are all checked. EMC validation per the customer's construction-machinery EMC specification is performed in our in-house lab.

How to ask

The EBX-963 belongs to the Smart Control Modules family. To request the harness drawing, the hydraulic-valve manifold mating documentation, the RF remote-key pairing toolchain, the APP-side remote-control message profile, the CAN message catalogue or a PPAP package, please use the contact page with your target vehicle programme, expected annual volume and key technical requirements (top-cover style, tail-gate configuration, lift hydraulic specification, load-cell model, CAN protocol, IP rating, connector preference). Drawings welcome.