System Monitoring P-Bus.
Battery, tanks and loads at a glance.

The P-Bus system monitors PSS, PSM3 and PSL are the central display and control unit of the P-Bus energy management system for monitoring and controlling the entire onboard electrical system. They show battery status, power consumption, energy balance, tank levels, temperatures and AC and DC supply in real time – for use in boats, yachts, motorhomes, expedition vehicles and special vehicles.

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P-Bus system monitors PSS, PSM3 & PSL – central monitoring and control of the onboard system

In brief: P-Bus system monitors connect all components of the onboard electrical system via a CAN bus network and display all relevant system data centrally on one or more touch displays. The page P-BUS shows how the system is structured.

What are P-Bus system monitors and how do PSS, PSM3 and PSL work?

The P-Bus system monitors PSS, PSM3 and PSL are touch control units for the P-Bus energy management system. Via a CAN bus network they communicate with all connected P-Bus components and display battery data, tank levels, temperatures, switching states and AC and DC supply data in real time.

Several system monitors can be operated in parallel at the same time – at different locations in the vehicle or on board, each with individually configurable displays. PSS, PSM3 and PSL differ in display size, resolution and range of functions – all three models are fully P-Bus compatible and can be used together in the same system.

Which P-Bus components can be connected to the system monitors?

The P-Bus system is modular and scalable. Starting with a single battery management shunt, it can be expanded step by step into a complete energy management system:

P-Bus component	Function
SHX 300	Battery monitoring & energy balance – state of charge, current, voltage
SHC 612	Battery monitoring for up to 6 battery banks simultaneously
CMT3 tank interface	Tank monitoring for up to 4 tanks
CMR4 switching interface	Control and display of up to 4 switching functions
CAV AC interface	Monitoring of the AC system (shore power, generator)
TPC4 temperature interface	Temperature monitoring at up to 4 measuring points
LAU AC changeover unit	Control and monitoring of AC changeover units
ACE charger series	Integration of chargers into the P-Bus system
EM-Box	Energy management box for extended system functions

Using P-Bus as a battery monitor – how does it work?

With just a single battery management shunt, the P-Bus system monitor can be used as a full battery monitor – without any further components. Two variants are available:

SHX 300: records state of charge, current, voltage and also the entire energy balance of the onboard system. Precise in lithium systems too.

SHC 612: allows up to six battery banks to be monitored simultaneously – ideal for onboard systems with starter, service and lithium batteries.

Both shunts communicate directly with the system monitor via the CAN bus network.

How is the P-Bus system wired and networked?

All P-Bus components are networked via M12 connection cables, which link all devices via the CAN bus network. Thanks to the standardised M12 plug system, connection is straightforward. When planning a P-Bus system, allow for suitable M12 connection cables in sufficient length and number.

Firmware updates for P-Bus system monitors – how do I stay up to date?

Current firmware updates for all compatible P-Bus components are available in the download area. Regular updates extend the functions of the system monitors and ensure maximum system stability. It is recommended to install the latest firmware before commissioning.

Frequently asked questions. Answered briefly.

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Can several system monitors be operated at the same time?

Yes. Several PSS, PSM3, PSL or PSL Plus monitors can be operated in parallel in the same P-Bus system, at different positions on board or in the vehicle and with individually configurable displays. The PSS slave monitor with a 2.4-inch colour touchscreen supplements a system monitor and needs no configuration of its own.

Which data do the P-Bus system monitors display?

Battery status, power consumption and energy balance, tank levels with up to four tank senders per CMT3 tank interface, temperatures via the TPC 4 temperature interface, switching states of the CMR relay modules as well as AC and DC supply data. The monitors only show the menus for which data from connected components is actually available.

Is the P-Bus system suitable for lithium batteries?

Yes. The P-Bus system is designed for onboard systems with lithium batteries, inverters and DC-DC chargers. The SHX 348 and SHX 648 battery management shunts and the SHX 300-L energy shunt record state of charge, current, voltage and energy balance. Lithium batteries from other manufacturers are integrated via interfaces such as CBO-SB for SuperB or CMB for Mastervolt.

What is the difference between PSS, PSM3 and PSL?

They differ in display size and range of functions. The PSS is a slave monitor with a 2.4-inch touchscreen. The PSM3 has a 3.5-inch touchscreen and works with 8 to 64 V. The PSL offers 5 inches and three freely adjustable screen pages; the PSL Plus also connects up to four tank senders and two temperature sensors directly.

Can I also switch loads via the system monitor?

Yes. With the CMR relay modules you switch loads on the touchscreen of the PSM3 or PSL: CMR 411 S with four single-pole channels up to 10 A, CMR 811 S with eight, CMR 431 S with four channels up to 30 A. Windlass or bow thruster are switched by the FHC 265 P-Bus power switch.

System Monitoring P-Bus. Battery, tanks and loads at a glance.

All products. 38 items.

P-Bus Battery Management Shunt SHX 348

P-Bus Battery Management Shunt SHX 648

P-BUS System Monitor PSM3

philippi Control Unit PCU

NMEA2000 Adapter Cable N2K Cable

P-Bus Tank Interface CMT3

P-Bus Temperature Interface TPC 4

P-BUS Daughter Monitor PSS

P-Bus NMEA Interface CBN

Smart Interface SMI

M12 Terminator

P-Bus Main Switch Interface TSC

P-Bus AC Interface CAV

P-Bus-SuperB Interface CBO-SB

P-BUS-Studer Bridge XCOM-CAN

P-BUS-Studer Bridge XCOM-CAN-BMS

P-Bus-Masterbus Interface CMB

P-BUS System Monitor PSL

P-BUS System Monitor PSL Plus

M12 T-splitter 2/4-way

M12 T-piece

M12 T-Cable

AC transformer WAC 100

P-Bus Relay Module CMR 232 S