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7.5 Safety Mat
Achievable safety rating
Stop category
Features
Safety sensor/operating
mechanism
Notes
Note: All example applications shown are proposals without warranty. In any case the operator has
to perform a safety review of the entire site.
When the safety mat is stepped on, the EP-19xx switches off the 24-V supply for the modules
(switchable modules refer to the section, General Contact Information) within the safety segment and
thus also contactors K3 and K4. An interruption or a cross-connection in the supply lines for the
safety mat do not result in the failure of the safety function and is detected within before the next
starting cycle.
As an alternative to both NC contacts for the reset switch, an NO contact can be used there. One of
its contacts is set at M (0 V) and the other contact is wired through a diode to connection 1.1 and
through a diode to connection 1.3 (both cathodes to the switch).
The EP-19xx switches on the 24-V supply for modules within the safety segment if:
•
Safety mat has not been actuated
•
Feedback circuit (NC contacts of K3 and K4) is closed
•
Start push button has been pushed and released again.
Contactors K3 and K4 are controlled by the PLC and can switch on as soon as the EP-19xx has
switched on the 24-V supply. To reset the system, press the reset button within 0.1 to 2 sec after
switching on the power supply, even when automatic reset is used.
Combined with a safety mat EP-19xx modules attain safety rating Cat. 3 only.
GFK-2956A
Cat. 4
DIN EN ISO 13849-1
PLe
DIN EN ISO 13849-1
SIL3
IEC 62061/61508
0
EN 60204-1
• Single-channel monitoring
• Cross-connection detection
• Wire break detection
• Monitoring of external contactors (EDM)
Safety mat
• Manual reset
• Observe EN 1760-1 and EN ISO 13856-1
• The same interface is also possible for
pressure-sensitive buffers and
pressure-sensitive strips; however
check the safety ratings during use
• K5: Weidmüller RCIKIT(Z) 24 V DC 2CO
LD/FG (connect the coil connection at
the EP-1922 to 4.1 instead of to 4.2)
November 2017
Chapter 7. Example Applications
49
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