Wieland samos, User Manual

Page: 25 / 76

SA-BM Base Module
© 2010 Wieland Electric GmbH | BA000256 | 12/2012 (Rev. I)
25
On the front of the base modules you can set a off delay of 0..5 s, 0..50 s or 0..5 min,
depending on the device version. In position 0 release time = t
R
for undelayed outputs (see
Technical Data, page 15). Depending on the selected function block, the off delay acts on
outputs
Q3 and Q4 , only on Q4 , or on none of the outputs.
In functions without off delay (4 and 5) the delay switch must be set to 0 s, otherwise a
fault will be indicated. Contactors and/or relay output modules connected to the delayed
outputs are monitored separately via the feedback circuits (see “Control Circuit Functions”,
page 26).
___________________________________________________________________________
The behavior of off delay (retriggering) can be influenced by configuring terminal S3 .

ON
If the safe input state (“good state”) of
the input circuits is reached again
before the delay has expired, the
delayed output circuits do not alter and
the delay time is reset (

).
In restarting inhibit mode the Reset
button has to be actuated additionally
during retriggering time (

).
Bridge or feedback
circuit between
S3 and
clock output X1

Auto mode (restarting inhibit OFF)

Manual mode (restarting inhibit ON)
Example: In automatic mode the safety
door is opened and the off delay starts
for the corresponding enabling paths. If
the door is closed again before the time
has expired the enabling paths do not
shut down and the machine continues to
operate without interruption.

OFF
Regardless of the state of the input
circuits, the delayed output circuits open
after expiry of the off delay time
(

and

).
With automatic Reset and “good state”
before expiry of the off delay time, the
delayed output circuits shut down for
400 ms and then switch on again (

).
Bridge or feedback
circuit between
S3 and
supply voltage

Manual mode (restarting inhibit ON)

Auto mode (restarting inhibit OFF)

Auto mode (restarting inhibit OFF)
Example: In manual mode the
emergency stop button is operated and
the off delay starts for the corresponding
enabling paths. If the emergency stop
button is released before the time has
expired and the Reset button operated,
the enabling paths shut down anyway.
The delay time must expire before
enabling via the Reset input is possible
again.
Release delay
NOTE
Retriggering
EXAMPLE
EXAMPLE