ACD GRUPPE M2Smart HMI Case Projektierungshandbuch Seite 55

By design, an "unusual" actuation at the outer edge of the mushroom button is possible during the
emergency stop, due to that it can happen that the emergency stop signal is triggered but the mushroom
button does not snap in.
This behavior must be taken into account and intercepted when creating the program for the safety control
(safety PLC).
22.1.2 Regular Check of the Emergency Stop
The Emergency- Emergency must be checked regularly for tampering and damage.
Regular technical inspection:
The inspection interval is to be determined by the machine designer on the basis of the risk assessment.
However, it is recommended that the Emergency Stop button be triggered at least once a year by the
responsible safety officer for test purposes and to check that it is functioning properly:

Mechanical and electrical function test

Secure mounting

No tampering or damage detectable
To prevent active/inactive Emergency Stop buttons from being confused, inactive Emergency Stop buttons
must be made unrecognizable by locking them away or covering them.
22.2 Enabling Switch
22.2.1 Technical Data of the Enabling Switch
Contact type
Electrical life
Mechanical life
B10d
Rated operational
voltage
Rated operating
current
Switching frequency
Standards
Table 20: Technical data for enabling switch
®
M2Smart HMI Case_Bedien- Projektierhandbuch_Operating Project Engineering Manual_V1.06_de_en
3-stage enabling switch
100,000 switching cycles
Stage 1—2—1: 1,000,000 switching cycles
Stage 1—2—3—1: 100,000 switching cycles
100,000
30 V DC
1.0 A (resistive load)
0.7 A (inductive load)
1200 switching cycles/hour
EN 60947-5-1, EN 60947-5-8, EN 60204-1
Technical data
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