Safety engineering
Safety relay K
SR
11
11.3

11.3−2
EDSVF9383V EN 7.1−04/2012
 Danger!
Faulty operation in case of earth faults possible
The correct functioning of the safety function is not ensured if an
earth fault occurs.
Possible consequences:
Æ’ A failure of the safety function can lead to death, severe
injuries or damage to material.
Protective measures:
The electrical reference point for the coil of the safety relay K
SR
must be connected to the PE conductor system (EN 60204−1,
paragraph 9.4.3)!
Terminal strip X11 Internal wiring / wiring of terminal strip X11
3 4
3 3
K 3 2
K 3 1
3 43 3K 3 2
K 3 1
DC 24 V
X11
34
33
K32
K31
+5 V
+
+
–
K
SR
9300vec103
Fig. 11.3−1 Safety relay K
SR
Terminal Function
Bold print = Lenze setting
Level / state Electrical data
X11/K32
X11/K31
Safety relay K
SR
1st disconnecting
path
Feedback − pulse inhibit
Open contact: Pulse inhibit is
inactive (operation)
See technical data of the
safety relay K
SR
Closed contact: Pulse inhibit is
active
X11/33 – coil of safety relay K
SR
Coil is not carrying any current:
pulse inhibit is active
X11/34 + coil of safety relay K
SR
Coil is carrying current: pulse
inhibit is inactive (operation)
X5/28 Controller inhibit
(DCTRL−CINH)
2nd
disconnecting
path
Controller enable/inhibit LOW: Controller inhibited
HIGH: Controller enabled
LOW: 0 ... +3 V
HIGH: +12 ... +30 V
Input current at +24 V:
8 mA
Reading and processing
the input signals − 1/ms
(mean value)
Wiring
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