Limit Switches, Start Inhibitors

The limit switches and start inhibitors category includes specialised safety sensors and control modules designed to protect passengers and prevent mechanical damage to the vehicle. In buses, these systems override the driver's intentions – if safety conditions are not met, the vehicle will not move off.

Limit switches and start inhibitors in buses – the foundation of passenger safety

In public transport, safety is a priority, and the start inhibitor and limit switches are components that directly ensure it. Their primary task is to prevent the bus from moving off in dangerous situations, such as an open door, an open engine hatch or an extended step for passengers with disabilities. At Peterbus.pl, we offer reliable limit switches and inhibitor modules for buses from Solaris, MAN, Mercedes-Benz, Volvo and Scania.

Key components of the inhibitor systems in our range:

We supply components responsible for the vehicle's safety logic:

• Door limit switches: Sensors installed at door mechanisms that inform the controller when the leaves are fully closed. Their proper operation is essential for releasing the stop brake.

• Engine hatch start inhibitor: Limit switches that prevent the engine from being started when the rear hatch is open, protecting the mechanic during service work.

• Luggage compartment and access-hatch limit switches: Systems that inform the driver when a luggage compartment hatch is not fully closed on touring coaches.

• Ramp and step sensors: Inhibitors that prevent driving when the platform for wheelchair users is extended.

• Inhibitor relays and logic modules: 24 V electrical system components that process signals from the sensors and determine whether starting or driving is permitted.

Why is a properly functioning limit switch essential?

A failure of a small limit switch can immobilise the entire bus, generating a "doors not closed" error or locking the gearbox. By choosing parts from Peterbus.pl, you gain:

1. Guaranteed operational continuity: Our limit switches are highly resistant to dust, moisture and millions of switching cycles, eliminating accidental vehicle lockouts at stops.

2. Passive safety: Robust start inhibitors prevent the bus from moving off accidentally while passengers are still boarding or the engine is being serviced.

3. Selection by VIN: Sensors differ in contact type (NO/NC), mounting method and connector type. Our experts will precisely select the right limit switch for your model, such as Solaris Urbino or Mercedes Citaro.

4. New and tested used parts: We offer brand-new sensors from reputable manufacturers, such as Steute, Honeywell and Schmersal, as well as fully functional used inhibitor mechanisms.

Make sure the safety systems in your fleet are fully operational. Browse the range of door and hatch limit switches and start inhibitors at Peterbus.pl and choose components that never compromise on safety.