Operating Instructions for MRS Toggle Relays

Quick guide from the manual

This document provides essential operating instructions for MRS Toggle Relays. These devices are intended for use in vehicles and self-propelled work machines. Installation, maintenance, and disassembly must only be performed by qualified staff. Always ensure the system is de-energized before working on the relay. The relay must be mounted with connectors pointing downwards to prevent water ingress.

Product Description

MRS Toggle Relays function as electromechanical switches. Applying a positive or negative pulse to terminal 15 causes the relay to switch and latch. A subsequent pulse switches it again. Certain models support graphic programming via the MRS Realizer and Z-graph, while standard 12V and 24V models are not programmable and switch based on the signal at input KL15.

Safety

General Safety: The relay must not be opened. Any damage to the casing, locking catch, seals, or flat plugs requires immediate shutdown. Do not use the relay if it has been dropped; return it to MRS for inspection. The manufacturer of the complete system is responsible for ensuring that the relay circuitry and programming do not cause safety-relevant malfunctions.

Staff Qualifications: Only specialists, experts, or authorized persons familiar with electronic assemblies and relevant safety regulations should perform installation and maintenance.

Assembly

Mounting Location: Select a location with minimal mechanical and thermal load. Avoid exposure to chemicals.

Mounting Position: Mount the relay with connectors pointing downwards. This allows condensation to drain and prevents water from entering the unit. Ensure compliance with IP protection class requirements by using appropriate accessories.

Fastening: For relays with flat plugs (ISO 7588-1), plug the unit vertically into the slot provided by the system manufacturer. If used in a vibrating environment, secure the relay with a latch.

Electric Installation and Wiring

Wiring: Always use an external fuse in the power supply line to protect against overvoltage. Cables must be strain-relieved and friction-free. The cable harness must move identically to the controller/plug. A strain relief is mandatory, with a maximum distance of 100 mm from the relay.

Commissioning

Before commissioning, ensure the complete system is in a safe state and that no persons are in the vicinity. Verify that the correct software is embedded and that the environment is safe (horizontal, solid ground, no weather impact). A functional test on-site is recommended.

Maintenance and Cleaning

The relay is maintenance-free. Do not use high-pressure cleaners or steam jets, as these can damage the unit. Do not use aggressive solvents or scouring agents. Clean only in a dust-free environment. If the relay is damaged or contacts are corroded, it must be removed and disposed of according to national environmental regulations.

Fault Removal

In case of faulty operations, check the software, circuitry, and parameter settings. Ensure the system is de-energized before removing the relay for inspection. Check all flat plugs and pins for signs of overheating, insulation damage, or corrosion.