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Bolec BEM302 Basic Engine Protection – Panel Watchdog panel

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 2

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 3

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 4

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 6

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 7

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 8

Bolec BEM302 Basic Engine Protection - Panel Watchdog panel - Image 9

Bolec BEM302 Basic Engine Protection – Panel Watchdog panel

Name: Bolec BEM302 Basic Engine Protection - Panel Watchdog panel
SKU: BEM302
Price: 1028.00 AUD
Availability: InStock

$1,028.00

Add 1.5m Breakout Harness (+$150)

Adds a 1.5m breakout harness to your kit

Add 1.5m Breakout Harness (+$150) (+$150.00)

Add WL601P Probe

Add Extra WL601 Probe (+$20.00)

WL601P Water Level Probe

Product price:	$1,028.00
Total options:
Order total:

Available to order Bulk order pricing Delivery information Need help? 0480 312 400

BEM302 Engine Protection & Automatic Shutdown Panel — monitors six
engine or machine fault inputs, delays protection during starting, then provides
audible / visual warning and automatic shutdown when a valid fault is detected.

6 monitored inputs
Startup delay
Automatic shutdown
Fault Recall — up to 6 events
12VDC / 24V available
IP56 enclosure

Suitable for trucks, buses, boats, agricultural machinery and stationary engines.
A practical Murphy 09PWP12V09 / D3 Watchdog alternative for suitable
applications after wiring, voltage, sensor and shutdown requirements are verified.

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This selector narrows products by stated specifications only and does not confirm direct compatibility. Water gauge: 291.4–22.4 Ω; water senders: 291.5–22.4 Ω. Oil temperature gauge: 316–19 Ω; oil temperature senders: 361–19 Ω. The 0–5 bar oil pressure gauge and 0–10 bar pressure sender use different pressure ranges. Confirm the complete calibration and installation requirements before ordering.
 
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Product resources

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BEM302 overview

Engine protection, automatic shutdown and fault history in one panel

The BEM302 is a compact electronic engine watchdog panel for trucks, buses, boats, agricultural machinery and stationary engines. It monitors six connected fault inputs, allows the engine to stabilise during starting, then provides warning and automatic shutdown when a valid fault is detected.

Monitors six engine or machine fault inputs
Startup delay prevents nuisance shutdown during cranking
Audible and visual fault warning
Automatic engine shutdown output
Fault Recall stores up to six fault events
12VDC standard; 24V version available

A4 product summary — print or save as PDF. Print this page

Operating sequence

How the BEM302 protects the engine

One simple sequence explains what happens from starting through to shutdown and diagnosis.

Engine startsThe machine uses its normal starting controls.
Startup delayOil pressure and charging conditions are allowed to stabilise.
Monitoring activeThe six connected protection inputs are watched continuously.
Fault detectedA connected switch changes state because an abnormal condition is present.
Alarm and shutdownThe warning and shutdown outputs are activated.
Fault retainedFault history can be recalled for troubleshooting.

Installation note:The final engine stop method depends on the fuel solenoid, stop circuit, connected switches and wiring. Installation and commissioning should be completed by a suitably qualified technician.

Protection inputs

What the BEM302 monitors

All six published protection functions are kept together in one table so they are easy to find.

Low oil pressure	Monitors the connected oil-pressure switch and initiates shutdown when a valid low-pressure fault is detected after startup.
High engine temperature	Uses the connected temperature switch to protect the engine when the configured high-temperature condition is reached.
Alternator / belt failure	Monitors the charging or belt-failure input so loss of alternator operation can be identified.
Loss of coolant	Can monitor a compatible coolant-level circuit to detect coolant loss before severe overheating occurs.
Configurable spare input 1	Can be allocated to an additional engine or machine protection condition.
Spare input 2 / pump loss of prime	Published with pump loss of prime as the default application and may suit another configured fault function.

Fault Recall

See the stored fault history after the engine has stopped

The BEM302 does more than indicate that a shutdown occurred. Its published Fault Recall function allows up to six fault events to be recalled, helping operators and technicians investigate recurring or intermittent shutdowns.

Up to six fault events

Review fault history after shutdown
Assist diagnosis of intermittent problems
Confirm the protection inputs during commissioning

Murphy 09PWP12V09 / D3 Watchdog comparison

BEM302 vs Murphy 09PWP12V09 engine protection panel

The BEM302 can be a practical Murphy Watchdog alternative for suitable applications, but the two products use different panel formats and must be selected by function, wiring and required instruments.

Selection point	Bolec BEM302	Murphy 09PWP12V09 / D3 Watchdog
Panel format	Electronic six-input engine protection panel	Gauge-based weatherproof engine protection panel
Monitored functions	Oil pressure, engine temperature, alternator / belt failure, coolant loss and two spare inputs	Oil pressure, engine temperature and water pressure Swichgage functions
Automatic shutdown	Yes — electronic shutdown sequence	Yes — Murphy 518 shutdown relay
Timing	Startup delay for protection during cranking	Published with a run timer up to 100 hours
Fault history	Fault Recall of up to six events	No equivalent six-fault memory is listed on the current Bolec Murphy product page
Tachometer / hour meter	Not listed as a standard BEM302 function	Published with 0–3000 RPM tacho / hour meter
Replacement guidance	Do not assume a direct or pin-for-pin replacement. Verify supply voltage, sensor and switch types, shutdown logic, output load, panel dimensions and required instruments before replacing a Murphy panel with a BEM302.

Murphy, D3 Watchdog and Swichgage names are used for product identification and application comparison. Specifications can vary by panel configuration.

Published product data

BEM302 specifications

Model / SKU	BEM302
Applications	Trucks, buses, boats, agricultural machinery and stationary engines
Supply	12VDC; 24V version available
Enclosure rating	IP56
Monitored inputs	6
Published outputs	2
Output relay	30A at 12VDC
Fault history	Fault Recall of up to six fault events
Published dimensions	280 × 190 × 130mm

Available product options

1.5m breakout harness
WL601P coolant-level probe option

Available options are selected in the purchase area above the product description.

Commissioning checks

Confirm each fault input and switch polarity.
Confirm shutdown output operation and connected load.
Test the startup delay and each shutdown condition.
Verify that fault history can be recalled after shutdown.

Watch the Bolec engine protection panel video

The controlled BEM302 instruction manual and the markings on the supplied product take precedence.

Frequently asked questions

BEM302 selection and replacement questions

Is the BEM302 a direct replacement for a Murphy 09PWP12V09 panel?

No direct or pin-for-pin replacement is claimed. The BEM302 can be a practical alternative where its six electronic fault inputs, shutdown logic and output arrangement suit the application. Murphy gauge functions, wiring and panel instruments must be checked individually.

What does Fault Recall store?

The published Fault Recall function allows up to six fault events to be recalled for troubleshooting after a shutdown.

Why is there a startup delay?

During cranking, oil pressure and charging conditions may not yet be normal. The delay prevents these expected startup conditions from creating an immediate false shutdown.

Does the BEM302 stop the engine automatically?

Yes. After the startup delay, a valid monitored fault activates the warning and shutdown sequence. The final stop method depends on the connected engine shutdown circuit.

Documents and support

BEM302 instruction manual and application assistance

View BEM302 Instruction Manual Installation, operation and controlled product information. Technical and replacement support Ask about sensors, wiring, shutdown logic, output loading or Murphy Watchdog suitability.