Skip to main content

PCM2 34 and 48 Channel Power Control Modules - the smart solution to race car wiring by OBR

The intelligent control and distribution of battery power in a modern racing car. The PCM2 and PCM2 Lite are innovative, intelligent and programmable solid state modules which replaces relays and circuit breakers, simplifies wiring harnesses and provides diagnostic capabilities.

PCM2 Power Control Module 34 & 48 channels PCM2 Power Control Module 34 & 48 channels
PCM2 Power Control Module 34 & 48 channels thumb PCM2 Power Control Module 34 & 48 channels thumb

Variations

P/N# Model Crank and Cam Triggers Price in USD
OB963 34 channel PCM2 power control module Fully programmable solid state module 2835
OB960 Service fee for updating PCM2 Update PCM2 from 34 channels to 48 channels 630
OB951 48 channel PCM2 power control module Fully programmable solid state module 3465

PCM2 Power Control Module 34 & 48 channels

PCM2 high tech power control modules are available in two versions, a 34 and a 48 channel version.

34 or 48 high side outputs.
30 analog and digital inputs.
4 CAN ports with CAN routing.
User defined event controlled logic.
Multitasking operating system.
Real time clock.
RS232 serial port diagnostics.
4 military grade motorsport connectors.
6061-t6 aircraft grade aluminum CNC machined enclosure.

No license required, free software.

Inputs

Data given for 48 channel version, the 34 channel version can be customized to suit your requirements.

  • 16 x analog 0-5V inputs with selectable pull-up resistors (None / 3.6 kOhm / 47 kOhm).
  • 14 x digital inputs triggering on low / open / high signal levels.
  • 4 x CAN ports with 64 CAN channels with software selected CAN termination and routing between ports at baud rates between 10 kbps to 1Mbps.
  • 1 x reset switch.
  • 2 x internal temperatures are monitored and can be exported via CAN.

Outputs

Data given for 48 channel version, the 34 channel version can be customized to suit your requirements.

  • 26 x high side power outputs (typically up to 10A continuous), max 300 Hz PWM.
  • 12 x high side high power outputs (typically up to 26A continuous), max 300 Hz PWM.
  • 2 x high side very high power outputs (typically up to 26A continuous, 200A peak), max 300 Hz PWM.
  • 2 x high side wiper motor outputs (typically up to 10A continuous), max 300 Hz PWM.
  • 2 x half bridge high power PWM outputs (typically up to 26A continuous, max 25 kHz PWM. Outputs can be configured as low side, high side and as full H-bridge.
  • 6 x half bridge high power PWM outputs (typically up to 10A continuous), max 25 kHz PWM. Outputs can be configured as low side, high side and as full H-bridge.
  • 4 x ECU trigger channels, 30mA Tri-States with user defined switch levels.
    • 0.0 volt
    • 2.5 volt
    • 5.0 volt
  • In-rush current capability 150A.

Multiple outputs can be grouped for extreme high current applications.
Please note that the maximum recommended current draw per channel is limited by the
connector contacts - not by PCM2’s driver stages.  We have rated the individual channel’s
current draw in relation to the connector manufacturer’s specifications.

Communication

  • 4 CAN ports with up to 64 user defined input and up to 64 user defined export channels.
  • Baud rates from 10 kbps up to 1 Mbps.
  • CAN routing between ports.
  • Software selectable termination of each CAN port.
  • RS232 diagnostic port.

Dimensions

  • Dimensions
    • Weight 1,100g (38 oz.).
    • 197 x 183 x 37mm  (7 3/4" x 7 1/4" x 1 7/16").
    • All aluminum and high-end vibration stable SMD PCB.
  • 4 motorsport connectors with high pin density (111 in total).

Infobox

In the past, a production car uses relays and fuses or circuit breakers to protect the electrical system from short circuit damage and even fire in case of a fault in the wiring.

Such a system is not suitable for use in a competition car.  Relays and fuses are exposed to a harsh environment of heat and vibration which can cause unintended electrical shut downs.  Furthermore, the wiring for fuses and relays are often very complex and this makes fault tracing complicated, in particular if errors happen during competition.

In the modern world of electronics we have for many years done away with these vulnerable components and have replaced them with computer controlled modules.  Instead we have a microprocessor that monitors switch requests, current draws and load conditions.  OBR systems do not just shut down if there is a fault, they evaluate and analyze the cause of the failure and then reset failed channels automatically and test the outputs.

OBR's award winning PCM2, the new PCM LITE and the compact PCM AC power control modules (sometimes referred to as PDU or PDM) take the whole Power Control Module concept much further than conventional modules.  Based on our experience and success with developing power boxes, OBR PCM's are very powerful, flexible and technically advanced modules.  OBR PCM2, PCM LITE and PCM AC are huge steps ahead of our competitors, in technology, features and their very high current handling ability.

Our PCM modules provide an effective and inspired alternative to conventional relays, circuit breakers, fuses and wires that can so often be a tangle of complexity and untidiness around a typical racing car’s power junction box.

Furthermore, they monitor status, temperature and current draw for each individual output, an effective tool in detecting and preventing faults.

OBR PCM's have all been designed to handle very high inrush currents as well as high continuous current handling.  The inrush current is drawn in the instant when, for example, a fan is switched on or the paddle shift air compressor starts.  Our PCM's are capable of handling this kind of current draw of up to 300A over a short period of time.

With PCM2, PCM LITE and PCM AC OBR provide the user with modules which can handle virtually limitless event based configuration options.  By having the control logic arranged around user defined events it is the intention to offer an almost unrestricted control strategy to the end user.

OBR supply PCM LITE with a pre-configured setup ensuring a simple and straight forward installation – but still offering the user full access to write the control logic.

When evaluating power control modules it is very important to judge the weight of a module correctly.  To handle high currents and to dissipate the heat associated with these high currents, the module should feature the highest content of copper feasible within the design rules.

When it comes to selecting a PCM powerbox, remember the lightest unit is very likely not the most reliable!