Description
Features
Safety-critical
Sygnal drive-by-wire (DBW) was engineered from first principles to meet the demanding requirements for use in Automotive Safety Level D concepts under ISO26262. Dual redundant microcontrollers, power, CAN communications, and signal circuitry are provided, while extensive system diagnostics are available with fault behaviour configurable in the software.
The system can be configured to detect interactions with vehicle controls from the safety driver, disabling automatically, and in the event of an emergency, the E-Stop button reverts the system to a fail-safe state.
Solid-state
Proprietary solid-state circuitry performs all signal muxing without the use of relays.
Automotive-grade
Redundancy, automotive-grade components, and extensive diagnostics ensure the Sygnal DBW is ready for use on-road (when used according to the manufacturer’s instructions and as part of an adequately designed system to mitigate unacceptable risk).
- Harnesses built to OEM standards
- Housing rated IP67+
- Automotive-grade electronics
- Traceability records maintained for 10 years
30-minute install
Retain high vehicle resale value with OEM-grade plug-and-play wiring harness, ensuring easy installation without the need for wire cutting or permanent modifications. Sygnal DBW is designed for quick and easy integration with supported vehicles – simply unplug the OEM sensor connectors in the driver’s footwell and plug in the DBW harness. The MCM module is compact enough to tuck under the dashboard and the emergency stop button is located in the cupholder for simple installation, within reach of the safety driver.
Extraordinary economy
With the lowest purchase cost in the industry, that scales rapidly with volume, Sygnal DBW is a key part of large, profitable AV operations. Sygnal can be moved between vehicles as they are retired, protecting your investment and paying dividends for years to come.
PolySync DriveKit or OSCC replacement
Sygnal DBW is a straight replacement for Kia Soul and Kia Niro currently equipped with Polysync or OSCC, with direct compatibility with existing Open Source Car Control API allowing you to upgrade software at your own pace.
Dynamic documentation
As engineers themselves, the team at Sygnal understand that one of the most valuable parts of the product isn’t the product itself; it’s the documentation. The Sygnal DBW Knowledge-Base is the first line of support, constantly refined to provide engineers the answers they need as soon as they need them.
Components
Master Control Module (MCM)
The heart of the system, the MCM contains dual ASIL-B microcontrollers, dual-redundant power and communication, and proprietary solid-state signal muxing circuitry. Celver, ocmact design means that it will fit up under the dashboard with room to spare.
Plug-and-play wiring harness
With a twist-lock emergency stop button and LED condition indicators, the cleverly designed Emergency Stop Module mounts easily in any cupholder. The housing can be easily reconfigured to allow the cable to exit in any direction for the cleanest integration.
Emergency-stop module
Every Sygnal system includes a modular, multi-part wiring harness built to OEM standards. These harnesses can easily be swapped or upgraded for special applications. OEM connectors are provided for easy integration with no wire cutting.
Gamepad controller
Use the included USB gamepad after first installing the system to test and confirm proper operation by controlling the vehicle.
Specifications
The Sygnal DBW system has been designed from the ground up for safety and reliability. Dual-redundant processing, power, communications, and signal generation provide a high level of versatility for complying with the integrator’s safety requirements. Developer-friendly features such as ‘learn mode’ and CAN-based configuration make it swift and simple to adapt to your application.
System
Two fully redundant, dual-core real-time MCUs are co-located on the MCM board, each capable of full fail-safe control of the system.
- Solid-state, passive fail-safe condition for all output signals
- TUV-qualified functional safety compliant MCUs
- Automotive-grade hardware throughout
Power
Redundant wide-input power supplies are each capable of full system power provision. Power can be supplied from diverse sources and paths if necessary, to support the integrator’s safety case.
- Voltage – 6-28 VDC Nominal
- Power – < 0.5 A
Communications
All external communications are implemented in CAN, including diagnostics and firmware update. Dual channels are available for redundancy if required by the integrator.
- Dual CAN – 500Kbps
Signals
Signal input and output are tailored to the redundant by-wire control sensors found in automotive applications but can be configured for a wide variety of signal types.
- Input – 6 x 12-bit ADCs for input sensing
- Output – 6 x 12-bit DACs configurable for analogue, digital, or PWM out
- Relay – 2 x SPDT solid-state relays (commonly used for brake lights)
- Control – Built-in accelerated PID and non-linear PID
Mechanical & Environmental
Automotive-grade composite enclosure fits easily beneath the dash of most vehicles, minimising wire lengths and simplifying install.
- Temperature – -40ºC to 85ºC
- Temperature life – 1000hrs at 85ºC
- Sealing – IP67
- Salt spray – 96hrs
- Moisture cycling – 320hrs (40-8 hour cycle) at -40ºC – 85ºC
- Fluid resistance – resists most fluids found in industrial applications
Certification
Sygnal is working toward qualification of the MCM as a Safety Element out of Context (SEooC). Current versions of the MCM may be eligible for in-context qualification by the integrator, with support from Sygnal.
Harness
- Automotive TXL wire
- Fully sleeved for abrasion resistance
- USCCAR 1.5mm standard connectors (Molex MX150)
- Vehicle-specific sensor plugs for plug-and-play install
- Cup-holder-mounted emergency-stop button
Software and documentation
- Example applications available in Python
- USB gamepad controller provided for set-up demo
- Online document portal access included
