Allen-Bradley Guardmaster 440C-CR30-22BBB - Product Overview

Rockwell Automation Publication 440C-WD001C-EN-P - June 2015 33
Chapter 6
Muting 2-Sensor T-Type Bidirectional
The CR30 safety relay has a function block that supports two-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 two muting sensors
are arranged so that their beams form an “X” pattern where the crossover occurs
very close to the light curtain beam. The shape of the material must be such that
it breaks the muting sensor and light curtain beams in a specific pattern. The
function block contains timing parameters that allow you to accommodate a
wide range of operating speeds.
Product Overview
Figure 18 - Overview