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Engine Safety Unit ER
A compact engine safety unit that detects 6 faults, with a built-in charge lamp, LOP bypass timer and a 70 Amp contact.
Key features
- 4 Fault inputs
- LOP bypass timer
- 6 Fault Detection
- Fuse fail indication
- Built in Charge lamp
- Stop timer for ES type Solenoid
Made in Pune
Factory tested
Engineer support
About the Engine Safety Unit ER
The Engine Safety Unit ER (ESU-ER) protects a diesel engine by watching for faults and shutting the engine down before damage is done. Its front panel has six clear indications: Fuse Fail, Charge, Aux Trip, Low Lube Oil Pressure, High Temperature and V-Belt Fail. When a fault appears, its lamp shows the operator exactly what went wrong.
It has four fault inputs for engine sensors, and the fuse fail lamp warns when the protection circuit itself has a problem. Heavy brass stud terminals on the back carry the solenoid, fuse and battery connections, with a plug-in terminal block for the sensor wiring.
A built-in charge lamp shows whether the charging alternator is working. The LOP bypass timer ignores low oil pressure for a short time while the engine starts and pressure builds, so the engine is not shut down by mistake. A stop timer suits ES (Energised to Stop) type solenoids, and the heavy-duty relay contact handles up to 70 Amps. It works on 8 to 35 V DC and fits a 72 × 72 mm panel cut-out.
Specifications
- Dimension
- 72 X 72 X 120
- Supply
- 8-35VDC
- Relay Contact
- 70 Amp max
What the technical words mean
- LOP / LLOP
- Low (Lube) Oil Pressure. If oil pressure falls too low, the engine is shut down before its bearings are damaged.
- LOP bypass timer
- Oil pressure is low for a few seconds while an engine starts. This timer ignores low oil pressure during that time so the engine is not stopped by mistake.
- ES solenoid
- Energised to Stop. A fuel solenoid that must be powered to stop the engine. The stop timer keeps it powered long enough for the engine to come to rest.
- Charge lamp
- A lamp that shows whether the engine’s battery charging alternator is working.
- Fuse fail indication
- Warns when the fuse protecting the safety circuit has blown, so the engine is never left running without protection.
- V-belt fail
- Warns when the engine’s V-belt, which drives the cooling fan and charging alternator, has failed.
- Aux trip
- A spare fault input that can be wired to any extra protection the engine needs, so the unit can stop the engine for it too.
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