Honeywell SYA14 Series Manual page 568

FACTORY SETTINGS
•
The muting module is set in the conveyor mode on delivery.
•
The maximum timing tmax allowed between SM sensors is set to 1 s on delivery.
It can be modified to the following values : 2 s, 4 s, or 8 s.
• The setting of the timing tmax also sets the muting maximum duration ∆max. In the
conveyor mode (delivery settings), the muting duration is set to 2 mn (on delivery). It can be
modified to the following values : 4, 8 or 60 mn.
•
Refer to chapter 2.4.2 SM inputs, to select tmax and ∆max.
TIMING CONDITIONS
•
The 8 ms minimum time difference between the two SMs inputs guarantees the
detection of a permanent short circuits of any of the SMs inputs. Physically, the 2
sensors must be slightly apart.
•
If a new transition of a sensor SM occurs during a muting sequence, the muting
sequence is immediately stopped to avoid the permanent muting of the safety
function. The relative position of sensors SMs and the protective equipment ESPE
defines a minimum distance between 2 successive moving objects.
•
In the conveyor mode, the object must interrupt the safety light curtain
detection beams, before releasing both sensors SMs and 6s max. after the
actuation of the second sensor Sms.
One-way muting using 4 sensors
In the following example, two thru-scan (or retro-polarized) photoelectric controls
SM1&SM2 are used to start the muting sequence, and two additional thru-scan (or
retro-polarized) photoelectric controls EM1 & EM2 are used to stop it. These
sensors could also be ultrasonic sensors, inductive proximity sensors or limit
switches (correct operation of these sensors is monitored by the muting module).
This installation enables the muting of the protective equipment in one direction
only. It is recommended on applications where the entry and the exit points of the
material into the dangerous zone are different. The use of 4 sensors to perform a
muting sequence provides a high level of safety.
34 107004-15 EN FR26 ROW 0899 Printed in France