BWS-T2 Series Instructions manual
5
The BWS-T2 is rated as a type 2 ESPD (Electro Sensitive Protective
Device) according to the EUROPEAN STANDARD.
A type 2 ESPD is a device which relies on the correct response to external
tests to maintain its safety integrity. The device may not detect failures in
system integrity between tests.
1.1 OPERATING DESCRIPTION
The BWS-T2 features the following functions:
START INTERLOCK:
A start interlock is a means for preventing automatic starting after the
BWS-T2 is switched on.
INITIAL TEST:
A test which is performed via the start switch, after the BWS-T2 has
been powered, in order to test the complete safety related control
system before the first operation is initiated.
RESTART INTERLOCK:
A means for preventing automatic re-starting of a machine after the
optical beam(s) was (were) interrupted.
CYCLE TEST:
A test which can be performed at any time while the BWS-T2 is in the
active operating mode in order to test the complete safety related control
system.
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