Jetter JM-35 S1 Series, Manual, Page: 58 / 124

Example 2:
STO operation via safety
relay
CH 1
M1
3~
CH 2
M2
3~
M3
3~
3 3 3
STOx CH1
STOx CH2
GND
+24V DC
GND
K1
K2
Operation logic
K1 K2
X11
JM-3000
Fig. 5 STO operation via safety relay
NOTES ON EXAMPLE 2
The failure “Both contacts on an item of safety relay do not open” must be
excluded by means of the usage of a suitable switching element.
The failure “Simultaneous short circuit of the outputs to 24 V” is to be exclu-
ded by means of the suitable design of the safety relay and the wiring.
The failure “Short circuit between the outputs” is to be excluded by means
of suitable measures and the wiring.
The failure "Arbitrary short circuit in the cable from the safety switchgear
to the safety inputs, except STOx to GND" is to be excluded by means of
suitable wiring.
58 Jetter AG
Wiring and commissioning JetMove 3000