Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 260

02.03
05.01
Function
Using two SIGUARD contactor safety combinations (A1. A2) for Emergency
Stop and protective interlocking, it is possible to implement a configuration
according to EN954–1 Control Category 3 and EN1037. Using the circuitry as
shown in Fig. 8-9, a stop function, Category 1 according to EN 60204 is imple-
mented.
Switches S2 and S3 are positively–opening position switches corresponding to
EN 1088.
Response to
When the protective doors are opened, the contactor safety combinations trip,
opened protective staggered in time and initiate that the drive is stopped in accordance with
EN 60204–1 stop Category 1.
door
S
S
S
S
S
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SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
8.5 Start inhibit in the drive modules/safe standstill
Signal 0 is specified at the controller enable (CE) input of the drive by means
of the enable contacts of the contactor safety combination A1. The drive is
immediately decelerated to speed 0, and the pulses are canceled.
The delay time of the contactor safety combination A1 is set so that the drive
has come to a standstill when the delayed contacts open therefore initiating
the second contactor safety combination A2.
The contactor safety combination A2 instantaneously de–energizes the
safety relay in the drive via terminal 663. The feedback signal contacts of
the safety relay must be closed after the selected delay time has expired,
otherwise the drive is isolated from the line supply via terminal 48.
For a protective door with tumbler mechanism, the drive is stopped with sub-
sequent pulse cancellation, e.g. by pressing an appropriate button on the
machine. The "zero speed" signal releases the tumbler mechanism and
when the protective doors open, the safety relay in the drive is immediately
de–energized. In this particular case, the first timer stage (contactor safety
combination A1) is not required.
When the line supply is switched–in through K1 with button S1 "power on"
the correct functioning of the internal line contactor of the infeed unit is
checked using the feedback signal in the power–on circuit.
8 Important Circuit Information
8-259
8