Radio Remote Control

(RRC)

A Remote Control may be installed as standard equipment on many machines, or can be installed at a later stage to replace a pendant cable control or fixed control panel. The machine operator becomes more efficient - his work faster and more accurate. The operator can choose the best and safer position from which to control the machine, free from the restrictions of cables, and heavy pendants.

Safety is always at Utmost Importance in Industry:

Category 3: A single fault shall not lead to the loss of safety functions. Some but not all faults shall be detected. Accumulation of undetected faults can lead to the loss of safety functions.

What are the characteristics that define Category 3, according to EN-954-1 (EN 13849)?

1. The requirement to detect a single failure or breakdown does not mean that all failures or breakdowns will be detected. Therefore, an accumulation of unnoticed failures may led to an involuntary output or a dangerous situation in the machine.

Typical examples of practicable measures to detect failures are the use of feedback or the use of switches with forced guide or mechanically guided contacts, and monitoring of redundant electrical outputs.

2. The type-C standard manufacturers need to provide more details to detect failures in case of technology and application needs.

3. The behaviour of a Category 3 system means that:

a) When a simple or single failure occurs, the safety function is always executed.

b) Some but not all failures will be detected.

c) The accumulation of unnoticed failures may led to the loss of the safety function.

4. The technology used will influence whether or not the failure detection is triggered.