Access guarding at material output station
Requirement:
Pallets with changing load – e.g. different shape and size or partially loaded pallets – must be transported out of the danger zone. Access to the system must be guarded. To ensure optimum utilization of the system, it must be operated without interruption even when the pallets are being transported out.
Solution:
A safety gate with two multiple light beam safety devices at each end is installed on the conveyor line. The area between the photoelectric sensors is monitored by a horizontally mounted safety light curtain. The safety light curtain uses its protective field to detect the presence of people.
Operating principle:
Two safety sensors, which form a gate area with their vertical protective fields, are installed on the conveyor line. The transported goods are output through this area. The size of the area must be designed so that it completely encloses the largest possible transported goods. After the transported goods have left the gate area during outward transport, the horizontally mounted safety light curtain checks the gate area. The system only releases the safety sensor on the inside if no goods or persons are detected inside the area. The next transported item can then be transported out. The system monitors whether the processes are correct in terms of safety.
Advantages for you
- Flexible safety concept for optimum utilization of the system through interruption-free operation, even with changing loads
- Reliable outward transport of goods of any shape and size as well as partially loaded pallets
- No modifications required in the event of a format change
- No operator intervention necessary
System components and safety parameters
| Safety sensors: MLD 500 multiple light beam safety devices with device columns, ELC 100 or MLC 500 safety light curtain |
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| System control: MSI 400 safety control | |
| Leuze safety program | |
| PL e in accordance with EN ISO 13849-1, SILCL 3 in accordance with IEC 62061 | |
| 2-channel safety output |
