Functional Modes Of The Device - SICK MSM Instrucciones De Operación

Operating
Instructions
MSM
8 008 329/O371/05-04-04 © SICK AG • Industrial Safety Systems • Germany • All rights reserved
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Product description
(see 3.3.1). A muting indicator lamp is also essential for
operation. It signals the increased safety risk during muting. It
must always be connected in operation, as its function is
monitored.
The sensors and the lamp are plugged directly into the muting
module and supplied with the 24 V DC operating voltage.
3.2 Mode of functioning of the device
The muting module logically evaluates the signals of the
connected muting sensors and, when a valid muting condition
is encountered, mutes the photoelectric safety switch. The
conveyed material can pass through.
Muting condition
Using one sensor pair:
A 1 & A 2
Using two sensor pairs:
A 1 & A 2
B 1 & B 2
For a short time the following condition must apply:
A 1 & A 2 & B 1 & B 2
Ÿ It is irrelevant whether first A1 & A2 or B1 & B2 is activated.
Ÿ The muting cycle is ended when all muting sensors return to
their basic state (free light path); only then can muting be
reactivated.
Ÿ Within a muting cycle material can be conveyed several
times if the muting condition is sustained, i.e. at least one
sensor pair remains permanently active.
Muting of the MSL
Muting of the MSL
Muting of the MSL
(for the other sensor pair to
adopt the muting condition)
Section 3