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Bolec BEM502VM – Engine Protection Panel Watchdog Panel with Battery/charge Voltage Monitoring
$1,620.00
BEM502VM is a compact, industrial-grade engine protection unit featuring automatic shutdown, dual outputs, and fault memory. Designed for stationary diesel engines, it monitors critical parameters like battery/charge voltage, oil pressure, engine temperature, coolant level, and alternator status. Suitable for 12–24V systems.
Instruction manual
BOLEC Gauge & Sender Selector
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Compatibility note
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
BOLEC Product catalogue / Technical guide
Industrial engine protection
BEM502VM
Engine Monitor with Battery and Charge Voltage Monitoring
- 12–24 VDC
- 6 monitored inputs
- 2 outputs
- IP56
bolec.com.au | sales@bolec.com.au | 0480 312 400
BEM502VM technical overview
Heavy-duty protection and automatic shutdown for stationary industrial engines
The BEM502VM monitors critical engine conditions and can initiate shutdown when a configured fault occurs. It is intended for diesel-powered pumps, compressors, generators and other stationary industrial engine applications.
- Battery and charge monitoring
- First-fault memory
- Automatic shutdown
- 12–24 VDC
A4 catalogue layout — print or choose “Save as PDF”.
Product overview
Engine protection built for industrial applications
The BEM502VM combines critical-condition monitoring, clear fault indication, first-fault memory and shutdown control in one industrial engine panel.Clear fault indication
LED indicators identify the fault type and system condition for faster diagnosis.First-fault memory
Stores the first detected fault condition, including after power loss, according to the supplied product description.Monitored conditions
Six critical engine functions
The panel is described as monitoring the following preconfigured engine and electrical conditions.Battery and charge voltage
Monitors battery and charging-system voltage for abnormal conditions.Oil pressure
Monitors the engine oil-pressure protection input.High engine temperature
Detects a high-temperature switch condition requiring warning or shutdown.Loss of coolant level
Supports a coolant-level protection input for loss-of-coolant detection.Alternator or belt failure
Detects an alternator condition that may indicate drive-belt breakage.Fuel or run-coil control
Provides an output for the fuel solenoid or run coil, plus an auxiliary alarm or relay output.Product data
Specifications
The values below reproduce the technical information supplied in the existing product description.| Ingress protection | IP56 |
|---|---|
| Sensor inputs | 6, preconfigured |
| Outputs | 2 — fuel solenoid and auxiliary alarm |
| Supply voltage | 12–24 VDC |
| Stated current rating | 30 A |
| Dimensions | 280 × 190 × 130 mm |
| Coolant-sensor support | Yes |
| Pump monitoring | No |
| Application | Stationary industrial engines |
Confirm load and circuit ratings Use the controlled Bolec documentation and the markings on the supplied panel when selecting fuses,
loads and external relays. The current product price is shown in the WooCommerce purchase area above.
Product comparison
Compare engine-monitoring panel options
The table below preserves the comparison data from the original BEM502VM description. Prices are indicative values from that source and should be reconfirmed before quoting or ordering.| Feature | Murphy 09PWP12V09 | Bolec BEM502IRN | Bolec BEM502VM | Bolec BEM302 |
|---|---|---|---|---|
| IP rating | IP56 | IP56 | IP56 | IP56 |
| Programmable timer | Yes | Yes | No | No |
| Automatic shutdown | Yes | Yes | Yes | Yes |
| Fault memory | No | Yes | Yes | Yes |
| Sensor inputs | 6 | 6 | 6 | 6 |
| Outputs | 2 | 2 | 2 | 2 |
| Voltage range | 12–24 VDC | 12–24 VDC | 12–24 VDC | 12–24 VDC |
| Current rating | 10 A | 30 A | 30 A | 30 A |
| Dimensions | 280 × 190 × 130 mm | 280 × 190 × 130 mm | 280 × 190 × 130 mm | 280 × 190 × 130 mm |
| Indicative price in supplied source | Approximately $2,800 | $1,788 | $1,500 | $1,028 |
| Pump monitoring | No | Yes | No | Optional spare input |
| Coolant-sensor support | Optional | Yes | Yes | Optional |
| Application type | Industrial engines | Irrigation / diesel | Industrial engines | General purpose |
Comparison values and indicative prices are reproduced from the supplied page content and have not been independently verified in this HTML conversion.
Product video
See the Bolec engine-protection range
The original MP4 video is retained below using the same Bolec media address.
Watch the BEM502VM product video
Scan the QR code with a phone or tablet to open the original Bolec MP4 video.bolec.com.au/wp-content/uploads/2025/10/Copy-of-Bolec-Electronics.mp4
Frequently asked questions
BEM502VM FAQ
Quick answers based on the product information supplied for this page.What applications is the BEM502VM designed for?
It is described for stationary industrial engines, including diesel-powered pumps, compressors and generators.
Does it shut the engine down automatically?
Yes. The supplied description states that a configured critical sensor fault can initiate automatic engine shutdown.
Does it remember which fault occurred first?
Yes. The supplied description states that the first fault condition is stored, including after power loss.
Does the BEM502VM include pump-pressure monitoring?
No. Pump monitoring is listed as unavailable on the BEM502VM. The BEM502IRN is listed with pump monitoring in the supplied comparison.
Can it operate in both 12V and 24V systems?
The supplied specification lists a 12–24 VDC voltage range. Confirm the exact wiring, fuse and load arrangements before installation.
Documents and help
Technical documents and application support
No controlled PDF address was included in the supplied description, so the document links below request the latest files from Bolec. Request the datasheetEmail Bolec for the latest controlled BEM502VM specification. Request the instruction manualObtain current wiring, setup and commissioning instructions. Application supportAsk about sensors, shutdown circuits, fuel solenoids and panel selection.
The current controlled Bolec documentation and the markings on the supplied panel take precedence if any difference is found.
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