PLUTO Safety PLC

The New Safety PLC concept developed by Jokab Safety simplifies the design of safety systems

Pluto is a programmable safety system intended for safety applications where it is not accepted that faults in the control system lead to loss of a safety function. To achieve this requirement the system is designed with integral redundancy and monitoring. Unlike ordinary PLC systems, Pluto utilizes two microprocessors, which both control and monitor each safety function for correct operation. Each input to the system is separately connected to each processor, each having their own memory and executing their own program. The processors continuously compare the results with each other to ensure integrity of data.

Each safety output is connected to both processors and cannot be set without both checking that the logic conditions in the application program are fulfilled. Each Pluto unit has connections for CAN-bus and can be interconnected with other Pluto units. The degree of safety is the same over the bus as it is within each unit.

Pluto is primarily designed for fulfilling the demands of the EU Machinery Directive (98/37/EG) regarding safety of control systems and category 4 according to the harmonized standard EN 954-1. The system, however, can be used in other applications - e.g. processing industry, furnaces, etc. which have similar requirements.

Enclosure

Pluto is constructed in a 45mm wide box for snap mounting on a DIN-rail in control cabinets or other suitable enclosures.

External wiring is connected via screw terminals. To make it easy and to avoid incorrect connection when a unit is exchanged, the connector blocks are detachable so that individual wires do not have to be disconnected.