Hardwire Electronics PDM35 V2 Power Distribution Module

What is a PDM (Power Distribution Module)?

A PDM is a device used to replace conventional relays and fuses in a vehicle’s electrical system. The Hardwire Electronics PDM35 takes inputs from physical switches, analogue voltages, or the CAN bus, and provides power to multiple electronic devices such as radiator fans, fuel pumps and headlights. The current being drawn from each connected device is continuously monitored. If the measured current is too high due to a fault, the PDM switches off the respective output to prevent further damage to the wiring loom or the connected device. The PDM can then retry the output to see if the fault has cleared. PDM’s can also communicate with other devices via the CAN Bus.

Advantages Over Fuses and Relays

• Greatly simplifies system wiring and reduces system component count.
• Reduces the weight of the electrical system.
• Provides increased reliability over traditional systems using mechanical relays.
• Solid state technology removes the problem of relay contact corrosion and relay bouncing in vibration heavy applications.
• Smart features such as indicator and wiper motor modes remove the need for extra control units.
• Current draw can be monitored and logged to pre-emptively detect faults.

General Features

• Size: 7.87″ x 6.29″ x  2.13″ (200 x 160 x 54 mm)
• Weight: 1.62lb (735g)
• Operating Temperature: -67°F to 194°F  (-55°C to 90°C)
• Construction: Glass Fibre Reinforced Plastic
• IP Rating: IP67
• Connectors: Deutsch DT

Inputs

• Type: 16 Analogue inputs, which can also serve as digital inputs
• Measurement Range: Each input can measure between 0V-28V independent of the battery voltage
• Measurement Resolution: 12-Bit, or 0.01V
• Frequency Measurement: Automatic frequency measurement up to 300Hz
• Protection: Fully protected for input voltages from -24V to 40V
• Pull Up/Down Resistors: Each input has a permanent 200K Pull-up and 40K Pull-down resistor
• Added Features: Configure as active high or low. Configurable Hysteresis voltage. Latching or momentary operation.

Outputs

• 4 high/low side outputs 80A peak, 20A continuous (Pin-limited to 13A @125 deg C), with reverse current protection
• 31 high side outputs 80A peak, 20A continuous (Pin-limited to 13A @125 deg C)
• 10 outputs share a pin with an input. Please see the instruction manual for more information.
• Combined: 120A combined output maximum current
• Output Current Control Steps: 100mA (0.1A)
• Protection: Each output is overcurrent, overtemperature, load dump and reverse polarity protected.
• Soft Start: PWM soft start can be enabled on outputs to limit inrush current
• PWM: Each output can be Pulse Width Modulated based on a user defined variable. This can limit the speed of radiator fans, fuel pumps, and dim lights. 1000Hz maximum PWM frequency
• 5V: One 5V, 500mA output for supplying external sensors/Hardwire Electronics CAN Keypad
• Added Features: Outputs can be configured to stay on for a specified time after the input is removed, useful for thermo-fans. Outputs can be retried multiple times after an overcurrent event is detected.

Data Logging

• Storage: 128Mb of onboard flash storage for logging PDM data
• Speed: 1Hz to 50Hz
• Viewing: Data can be downloaded and graphed via the Hardwire Electronics PDM configurator software or exported as a .CSV file and graphed in external software

Functions

• Output Functions: Each Output can be switched with a user defined function
• Logical Operators: AND, OR, NOR, XOR, NAND, NOR, >, >=, <, <=, Equal, Not Equal

Match Channels

• Fully customisable Maths Functions
• Mathematical Operators: Mathematical Operators – Addition, Subtraction, Multiplication, Division, Modulus, Choose, Min, Max, Sin, Cos, Tan, Floor, Ceil, Abs, Asin, Acos, Ln, Log, Pow, Sqrt
• Binary Operators: Binary Operators – AND, OR, XOR, Left Shift, Right Shift
• Counters: Configurable counters which increment, decrement, and reset based on user defined conditions

IMU (Internal Measurement Unit)

• Rotation: 3-axis rotational position measurement 0.1° resolution
• Gyroscope: 2000°/s 3-axis measurement
• Accelerometer: -8g to 8g 3-axis measurement
• PCB temperature: PCB temperature measurement

RTC (Real Time Clock)

• Real Time Clock with battery backup for 30 days. Used to store the correct time and date for data logs

USB

• Type: USB 2.0 Compliant Mini-B
• Driver: Integrated driver for Windows 10
• Easy connection to the PDM with USB and Windows 10/11 integrated drivers. No unreliable USB-serial converter needed.

CAN Bus

• Interface: 1x CAN2.0A/B
• Bus Speed: 50kbps, 100kbps, 125kbps, 250kbps, 500kbps, 1000kbps
• Input Stream: 100x inputs, fully customisable variable parsing with bit masking, math functions, and compound CAN message filtering
• Output Stream: 100x Outputs, Fully customisable CAN frame construction with math functions

Supported Keypads

• Support for Blink Marine, Grayhill, Motec, Haltech and Marlin CAN keypads. Up to 4x keypads can be used at once.