Rockwell Automation Publication 2097-UM001D-EN-P - November 2012
165
Kinetix 300 Drive Safe Torque-off Feature
Chapter 8
Safe Torque-off Wiring Requirements
These are the safe torque-off (STO) wiring requirements. Wire should be copper
with 75 °C (167 °F) minimum rating.
Safe Torque-off (STO) Terminal Plug
IMPORTANT
The National Electrical Code and local electrical codes take precedence over the
values and methods provided.
IMPORTANT
Stranded wires must terminate with ferrules to prevent short circuits, per table
D7 of EN 13849.
1 2 3 4 5 6
+24 V DC c
ontrol
Contr
ol COM
Safety sta
tus
Safety input 1
Safety
COM
Safety input 2
Safe Torque-off (STO) Terminal Plug Wiring
Safe Torque-off (STO) Connector
Recommended Wire Size
Strip Length
mm (in.)
Torque Value
N•m (lb•in)
Pin
Signal
Stranded Wire
with Ferrule
mm
2
(AWG)
Solid Wire
mm
2
(AWG)
STO-1
STO-2
STO-3
STO-4
STO-5
STO-6
+24V DC Control
Control COM
Safety Status
Safety Input 1
Safety COM
Safety Input 2
0.75 (18)
1.5 (16)
6 (0.25)
0.2 (1.8)
IMPORTANT
Pins STO-1 (+24V DC Control) and STO-2 (Control COM) are used only by the
motion-allowed jumpers to defeat the safe torque-off function. When the safe
torque-off function is in operation, the 24V supply must come from an external
source.
IMPORTANT
To be sure of system performance, run wires and cables in the wireways as
established in the user manual for your drive.