User Manual

3SU12 compact units
6.1 Overview
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 02/2015, A5E03457306020A/RS-AB/002
127
Safety distance (refer also to EN 574, Section 9.8)
The safety distance between the sensor switches and the hazard zone must be large
enough to ensure that the operator cannot enter the hazard zone after release of a sensor
switch until all potentially hazardous machinery has ceased moving.
The safety distance "S" in mm is calculated according to the following formula:
S = V x T + C
Key to formula:
V = Hand/arm speed = 1600 mm/s
T = Reaction time in seconds (the reaction time of the sensor switch is max.
50 ms
)
C = Additional value = 250 mm
If entry of persons into the hazard zone following actuation of the sensor switch can be
reliably prevented, the additional value C can be set to "0".
However, the minimum clearance must always be 100 mm.
Mounting
The sensor switch can be mounted on front plates and in the following enclosures of the
SIRIUS ACT series:
● 3SU1801-1AA00-1AA1 (plastic enclosure; command point in center)
● 3SU1851-1AA00-1AA1 (metal enclosure; command point in center)
● 3SU1803-0AA00-0AB1 (two-hand operation console, plastic)
● 3SU1853-3AA00-0AA1 (two-hand operation console, metal)