Rockwell Automation Publication 2198-UM005C-EN-P - February 2022 165
Chapter 9 Kinetix 5300 Safe Torque Off Function
Wire the Safe Torque Off
Circuit
This section provides guidelines for wiring your Kinetix 5300 Safe Torque Off
(STO) drive connections.
Safe Torque Off Wiring Requirements
The STO connector uses spring tension to secure the wire. Depress the tab,
along side each pin, to insert or release the wire. Two rows of pins are provided
for drive-to-drive connections. Wire must be copper with 75 °C (167 °F)
minimum rating.
Figure 74 - STO Terminal Plug
Table 85 - STO Terminal Plug Wiring
IMPORTANT The National Electrical Code and local electrical codes take precedence over
the values and methods provided.
IMPORTANT To improve system performance, run wires and cables in the wireways as
established in Establish Noise Zones
on page 37.
IMPORTANT Pins SB+ and SB- are used to disable the STO function. When wiring to the
STO connector, use an external 24V supply for the external safety device
that triggers the STO request. To avoid jeopardizing system performance, do
not use pin SB+ as a power supply for the external safety device.
IMPORTANT Stranded wires must terminate with ferrules to prevent short circuits, per
table D7 of ISO 13849-1.
1
2
3
4
5
SB+
SB-
S1
SC
S2
6
7
8
9
10
Kinetix 5300 Drive
Top View
STO Connector
Recommended Wire Size
mm
2
(AWG)
Strip Length
mm (in.)
Torque Value
N•m (lb•in)
Pin Signal
STO-1/6
STO-2/7
STO-3/8
STO-4/9
STO-5/10
SB+
SB-
S1
SC
S2
0.2…1.5
(24…16)
10 (0.39)
—
(1)
(1) This connector uses spring tension to hold the wires in place.
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