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Danger!
If you use an external voltage source instead of the internally generated 24-V voltage (X-STO:
+24V_STO) to actuate the STO inputs, you must use a voltage source with low voltage and safe
electrical disconnection (SELV/PELV).
See the chapter "Safe Torque Off(STO) function" for further information.
Designation of the con-
nection terminal:
X-STO
Technical data:
Voltage range
0...30 VDC
Switching level LOW /
HIGH
0 V < LOW < 3 VDC
15 V < HIGH < 30 VDC, typical: 24 VDC
Current consumption at 24
VDC
typ. 12 mA per input
Line cross-section:
min. 0.25 mm
²
...max. 2.5 mm
²
Type of cable:
•
Shielded lines
•
Apply shielding on both sides
•
ZAdynpro shield coating version: Connection of pigtail to terminal 1 of connection
terminal X-STO
Cable lengths:
Max. 50 m
Connection type:
Screw terminals
Connection:
X-STO
+24V_
STO
GND
STO_A
STO_B
GND_
STO
(6)
(5)
(4)
(3)
(2)
(1)
K1
K2
1
Connection with internal 24 V voltage and protected routing
1
Modulation
X-STO
+24V_
STO
GND
STO_A
STO_B
GND_
STO
(6)
(5)
(4)
(3)
(2)
(1)
K1
K2
1
Connection with internal 24 V voltage using two separate
jacketed cables
1
Modulation
X-STO
+24V_
STO
GND
STO_A
STO_B
GND_
STO
(6)
(5)
(4)
(3)
(2)
(1)
K1
K2
1
+24V
0V
2
Connection with external 24 V voltage and protected routing
1
Modulation
2
External voltage source SELV/PELV
X-STO
+24V_
STO
GND
STO_A
STO_B
GND_
STO
(6)
(5)
(4)
(3)
(2)
(1)
K1
K2
1
+24V
0V
2
Connection with external 24 V voltage using two separate
jacketed cables
1
Modulation
2
External voltage source SELV/PELV
Original operating instructions
ZAdynpro
–
Part 1
Electrical installation
R-TBA17_01-GB 1837 Index 004
Part.-No. 00163459-GB
25/64
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