Rockwell Automation Publication 440C-WD001C-EN-P - June 2015 39
Chapter 7
Muting 4-sensor T-type Bidirectional
The CR30 safety relay has a function block that supports 4-sensor T-type
muting. With this function block, the material can only move in either direction:
from the hazard area to the non-hazard area or reverse. The four muting sensors
are arranged so that their beams cross orthogonally across the conveyor: two
inside the hazard area and two outside the hazard area. The length of the material
must be such that it breaks all four muting sensors and light curtain beams
simultaneously. The function block contains timing parameters that allow you to
accommodate a wide range of operating speeds.
Product Overview
Figure 23 - Overview
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