176 Rockwell Automation Publication 2198-UM001I-EN-P - May 2019
Chapter 9 Kinetix 5500 Safe Torque-off - Hardwired Safety
Cascade the Safe Torque-off Signal
The total number of drives in a single cascaded safety circuit is limited by the
current carrying capacity of the cascaded safety wiring. Refer to Tabl e 71
for
current rating per channel, per drive.
Figure 78 - Cascaded Safe Torque-off Wiring
Safe Torque-off
Specifications
To maintain safety rating, Kinetix 5500 drives must be installed inside
protected control panels or cabinets appropriate for the environmental
conditions of the industrial location. The protection class of the panel or
cabinet must be IP54 or higher.
Table 71 - Safe Torque-off Signal Specifications
For additional information regarding Allen-Bradley® safety products, including
safety relays, light curtain, and gate interlock applications, refer to
https://ab.rockwellautomation.com/Safety
.
Pin 1
SB+
SB-
S1
SC
S2
Pin 1
24V DC
First Drive
Middle Drive
Last Drive
Dual-channel
Equivalent
Safety Device
Attribute Value
Safety inputs
(per channel)
Input current < 10 mA
Input ON voltage range 18…26.4V DC
Input OFF voltage, max 5V DC
Input ON current, per input, max 10 mA, each drive
(1)
(1) The maximum number of drives cascaded with safe torque-off wiring is 50.
Input OFF current, max
(@ V in < 5V DC)
2 mA
Pulse rejection width 700 μs
External power supply SELV/PELV
Input type Optically isolated and reverse voltage protected
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