Safety Integrated - Industry - Siemens

Ex. No. Emergency Stop with monitored start Category 2
3.1
acc. to EN 954-1 with ET200S Safety Motorstarter Solution Local
Function
Description of the functionality
If people (in production technology) are close to machines,
then they must be protected using the appropriate equipment.
The Emergency Stop control device represents a widely
established component that protects man, machine and environment
against potential hazards. In this Safety Functional
Example, the Emergency Stop control device with positivelyopening
contacts is monitored by the PM-D-F 1 safety module.
If the Emergency Stop control device is pressed, the PM-D-F1
safety module shuts down the motor starter assigned to it according
to Stop Category 0 acc. to EN 60204-1. In this particular
example, a drive is stopped. Before restarting or acknowledging
the Emergency Stop shutdown using the start button,
it is checked as to whether the contacts of the Emergency Stop
control device are closed and the motor starter has been shut
down. This example only discusses the safety function. The
motor starter is operationally switched using a standard PLC
and is not considered any further here.
Note
Equipment, functional aspects and design guidelines for
E-Stop command devices are provided in EN 418 (EN ISO
13850 in draft status).
Advantages/customer benefits
■ Pure hardware engineering without having to configure/program
software for the safety-relevant technology
■ Extensive Profibus diagnostics of the motor starter and the
PM-D-F1 safety module.
■ As a result of the lower time/costs involved with materials
and wiring, the mounting space in the cabinet is reduced
and therefore the overall dimensions of the plants/system.
Contactor contacts welded signal
Using this circuit example, Category 2 according to EN 954-1
can only be fulfilled if, when the actuator fails, an alarm is automatically
output or the machine control initiates a safe condition.
If this is not the case, a second shutdown path is required.
This signal can be generated using the process image of the
motor starter.
52 Functional Example No. CD-FE-I-025-V10-EN
ET200S Standard ET200S HF
PAE 0.0 Ready 0.0 Ready (automatic)
0.1 Close contactor 0.1 Start motor (current
measurement)
0.2 Circuit-breaker
tripped
0.2 Group fault
0.3 Group alarm
0.4 Input 1
0.5 Input 2
0.6 Input 3
0.7 Input 4
1.0-1.5 Motor current Iact 1.6 Mode H-V-O
1.7 Ramp mode (only
DSS1e-x)
PAA 0.0 Motor clockwise 0.0 Motor clockwise
0.1 Motor counter-clockwise
0.2 Brake 0.2 Release brake
0.3 Trip reset
0.4 Emergency start
0.5 Self-test
Network 1:Time delay of the Emergency stop signal
Comments:
#Emergency stop
T1
& SE
Network 2:Feedback signal, contactor contacts welded, standard motor starter
Comments
#Contactor_close
T1
S5T#500MS
&
#Contactor_welded
&
Typical block: Signal, contactor contacts welded for motor starter
standard
Using the standard output "contactor welded" an indicator
light can be controlled. As a result of this signal, a second
shutdown path is no longer required.
TW
G_FB_XX_064