24V Central Power Distribution Module (CPD · J1939 / OSEK)

Overview

The EBX-2160 is the most network-rich device in the EBX BCM family — a 24 V Central Power Distribution module (CPD) that combines body-control logic, an integrated fuse / relay carrier and a full commercial-vehicle network stack (CAN + LIN, J1939 application protocol, OSEK direct-network-management, UDS / ISO 15765 diagnostics) in one sealed unit. Where the EBX-953 targets a commercial-vehicle BCM-with-PDB use case on a private CAN architecture, the EBX-2160 is the right tier when the program standardises on SAE J1939 (the commercial-vehicle CAN protocol) and needs OSEK-style coordinated sleep-wake plus UDS on-line configurability at the end-of-line.

Electrically the module operates across 16–32 VDC with quiescent current ≤ 1 mA and a wide 10–32 VDC CAN voltage range — the latter useful on construction-machinery programs where the bus voltage can sag during engine cranking. Four-layer hardware protection (over-voltage / over-current / short-circuit / over-temperature) covers each output channel. The fitness envelope (16–32 V + 10–32 V CAN range) is set so the device can sit on construction machinery, commercial-vehicle platforms and new-energy programmes on the same hardware (passenger-car aftermarket prototypes are supported on request).

Integrated functions

The EBX-2160 covers the body-control and power-distribution functions typically spread across several controllers on a commercial-vehicle harness. On the standard build the integrated logic services:

• Power distribution. Per-circuit fuse and relay routing for the body-actuator loads; main feed via slow-blow / mid-blow fuses on the high-current branches.
• Switch & sensor acquisition. Digital and analog switch / sensor input acquisition with per-channel level configurability (high / low active) and reserved spare channels.
• Lighting & horn. Headlamp / position lamp / fog lamp / turn signal / brake lamp / reverse lamp / horn drive and feedback.
• Wiper & washer. Wiper drive (intermittent / low / high) and washer pump control; reserved channels for an automatic-light / rain-sensor LIN sub-network where the program fits one.
• Ignition & standby. ON-fire / power-cut sequencing, scheduled deep-sleep power-off and authorised remote wake-up; battery state-of-charge / state-of-health sensor interface.
• Engine charging & fuel-system protection. Alternator excitation control; fuel-level acquisition; fuel-system anti-theft authentication (immobiliser-style challenge / response on the CAN backbone).
• Combination switch interface. LIN-bus interface for the steering-column combination switch (lighting / wiper / horn stalk) on programs that select a LIN combination switch.
• Communication authentication & signal forwarding. CAN-message authentication and signal forwarding between the powertrain CAN segment, the body CAN segment and the upper-vehicle / body-builder CAN segment.
• Safety alarms. Reserved input channels for gas-leak / liquid-leak alarm sensors on natural-gas or specialty programs.
• Network & diagnostics. 1 CAN bus running the SAE J1939 application protocol with OSEK direct-network-management; UDS (ISO 15765) and J1939-73 (DM1-style) diagnostics; UDS-driven on-line end-of-line configuration; Bluetooth / wired application-software re-flash on programs that ship a flash service.

Engineering details

The EBX-2160 is built on a single large PCBA with an aluminium-backed power layer that carries the relay coil drivers and the high-current bus bars. The internal carrier holds 11 main relays (24 V coil, ISO sealed mini-relay family — reference Hongfa HFV6 / HFV15 / HFV16 series or equivalent automotive-grade family) and 60+ blade fuses (5 A – 25 A reference mix from Littelfuse-style families) routed through the nine harness-side connectors on the perimeter.

• Four-layer hardware protection on every output: over-voltage cut, over-current limit, short-circuit cut-off and over-temperature de-rating
• Wide-range CAN front-end: 10 – 32 VDC bus voltage range, so the device keeps talking through engine cranking sags on construction-machinery programs
• Full network stack on the standard build: SAE J1939 application protocol, OSEK direct-network-management for coordinated sleep / wake across the network, UDS (ISO 15765) plus J1939-73 (DM1-style) diagnostics
• On-line configurability: per-vehicle option-bits and timing parameters are written at the end-of-line over UDS, so the same hardware can ship in multiple variant trim levels without re-flash
• Application-software re-flash over Bluetooth or wire on programs that ship a flash service (FOTA-style update path)
• 9 sealed harness connectors (A–J skipping I) from the Tyco automotive series on the current production build
• IP53 sealing (dust-protected, splash-protected) suitable for cab-mounted installation on commercial vehicles and construction machinery; specify a sealed-connector variant at quotation if the program needs chassis-mounted IP67

Mechanical layout & internal carrier

Technical parameters at a glance

Functional map

Mating connectors & reference build

Current-production EBX-2160 housings include 9 OEM-grade automotive connectors (A–J skipping I) from the Tyco automotive series. The internal fuse / relay reference mix below documents the components on the current production build; the matching wire-side seals, terminal P/N and per-position fuse / relay rating are confirmed against the customer harness drawing at quotation.

Internal fuse & relay configuration (reference build)

The standard production build carries 11 main relays (24 V coil, ISO sealed mini-relay family) and a 60+ blade-fuse bank across the central bus, sized for the typical commercial-vehicle body-load mix. The reference component set below documents the current production build; programme-specific OEM internal P/N is shared on PPAP request, and the final fuse / relay mix and component sourcing are confirmed against the customer harness drawing at quotation.

Comparison with other Youlai BCM / CPD modules

The EBX BCM / CPD family covers two main voltage classes (12 V and 24 V) and two architectural patterns (pure-logic BCM vs. integrated fuse/relay BCM / CPD):

The EBX-2160 is the right choice when the program standardises on SAE J1939 with OSEK network management and needs the largest integrated fuse / relay carrier in the EBX family. Programs that need an integrated fuse / relay BCM on a private CAN architecture should look at the EBX-953; programs that need a high-density input bank without the integrated fuse / relay carrier should look at the EBX-954.

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 — CAN bus health, J1939 DM1 diagnostics, UDS configuration write, quiescent current and each integrated fuse / relay position are all checked. Environmental validation and EMC pre-compliance screening in our in-house lab is run when the programme requires it.

How to ask

The EBX-2160 belongs to the Smart Control Modules family. To request the harness drawing, the per-position fuse / relay map, the J1939 DBC reference or a PPAP package, please use the contact page with your target vehicle programme, expected annual volume and key technical requirements (target voltage class, CAN protocol family, IP rating, working temperature, connector preference, network management profile). Drawings welcome.