Siemens SINUMERIK 840D Description Of Functions page 398

7 Configuring example
7.3 Safety Integrated with SPL
Circuit diagram
7.3.8 De-selecting SBH via the key-operated switch
7-398
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
PLC
Q 48.1
+24V
13 open
Door button
14
closed
PLC
I76.3
I76.1
I76.2
Fig. 7-15 Wiring of the door switch
Note
If external devices and equipment (hydraulics, cooling water, etc.) are to be
powered-down/disconnected when the door is opened, then in this case, the
same contactor circuit should be used as for the Emergency Stop (K1/K2).
This means that an output must be supplied, in the PLC-SPL
($A_OUTSEP [ n ] ) as well as in the NCK-SPL ($A_OUTSE [ n ] ) that drops-out
when the door opens. The checkback input must be checked every time the
protective door is opened, or even better, integrated into the forced checking
procedure of the inputs/outputs (error response STOP D from PLC) – if it is
not certain that the door will be opened once within eight hours.
The safe operating stop is not active when the protective door is closed. When
the door is open, the operator can switch between safe operating stop and
safely-reduced speed using a key-operated switch. In addition, the switch
setting in the PLC can be used to select one of the NC operating modes.
21
31
I1
13
22 32
I2
14
NCK
I2
SCHALTPL.DSF
© Siemens AG 2003 All Rights Reserved
11.03
SIGUARD
Door switch