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Decades ago, the critical electronic components in a race car were the ignition coil and points. Race cars now feature advanced engine management systems, antilock brake systems, paddle shifters, dataloggers, radios, electric pumps, fans, and lights. All components need to be controlled at the correct moment, and all components require circuit protection to prevent damage or fire.

Traditionally, fuses and relays served all of those purposes, but they have many disadvantages like complicated wiring looms, sensitivity to vibration/temperature, and difficult diagnostics.

All of these problems can be solved by using intelligent power management units (PMUs). The newly developed PMU unit is at the forefront of technology. It provides 16 high current outputs (and use of multiple units if more outputs are required).

One of the main advantages of the PMU is continuous current sensing and self-resetting function if the current exceeds a defined level. All output state, voltage and current information can be logged and transmitted via a CAN bus to dash displays to inform drivers of potential problems.

An additional advantage of the PMU system is the ability to define logic for controlling outputs. This is done with data from analog input channels or CAN bus data, and math operations can be defined for each channel. The PMU is also equipped with LED indicators to show the status of each output.

With use of CAN bus keypads or steering wheel switches, all wiring is vastly simplified and lightened.

Two unique features are the inbuilt accelerometer and gyro for logging and “inertia switch” in case of accident.


The PMU is assembled according to IPC-S-815A standards to ensure product reliability. The device is manufactured on an automated assembly line with optical inspection, and automated testing (including burn-in).  The PCB material and design, special surface coating and IP60 enclosure ensure reliability even in the harshest environments. Carefully selected components allow for continuous and reliable operation across a very wide temperature range (AECQ-100 GRADE 1 (-40 to +125˚C).



Temperature range

AECQ100 GRADE1 (-40 to +125˚C)


32 bits automotive, 90MIPS

Reverse polarity protection

Yes, internal

Operating voltage

6-22V, immunity to transients according to ISO 7637


IP 60, bespoke CNC machined aluminium

Size (mm) and weight(g)

131x112x32.5, 345g


1 x 39 Automotive connector,

1 x M6 stud for battery connection

PC communication



High current outputs

10 x 25A(cont.), 6 x 15A(cont.) with overcurrent and overheating protection. Outputs may be paired to increase continuous current capability. Current and voltage is measured for each output

Total current output

150A continuous

Output current control step


Wipers output

Dedicated output with wiper braking feature


Monitored 5V, 500mA output for powering external sensors.


Analog inputs

16 inputs, 10 bit resolution, 0-5V (protected), with software selectable 10K Ohm pullup and pulldowns

CAN Keypads

2 x Ecumaster keypads (4, 6, 8, 12 keys)


Output state indication

16 bicolour LEDs


3D accelerometer with 3D gyroscope for logging and crash detection

Real time clock

Yes, super capacitor for backup power (up to 3 days)



CAN interface

2 x CAN2.0 A/B

CAN standard

CAN2.0 A/B – 125, 250, 500, 1000 kbps

Input/output stream

User defined with bit masking,

up to 100 input messages


Logging memory

256 Mbytes

Logging speed

Variable, defined per channel, up to 500Hz


Logical operators

AND, OR, NOT, XOR,  >, <, =, >=, <=, !=, isTrue, isFalse, Toggle, Flash, Pulse

Number of functions


Number of operations


Update frequency


Special functions

Wipers, blinkers


*Version PMU-16DL

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