QSHT 5700 Inverter Safe Torque-off Function
Hardwired Safe Torque-off
QuickStick HT User Manual 279
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Hardwired Safe Torque-off Electrical Specifications
For additional information regarding Allen-Bradley
®
safety products, including safety relays,
light curtain, and gate interlock applications, see https://ab.rockwellautomation.com/Safety.
IMPORTANT To maintain their safety rating, QuickStick HT 5700 invert-
ers must be installed inside protected control panels or cabi-
nets appropriate for the environmental conditions of the
industrial location. The protection class of the panel or cabi-
net must be IP54 or higher.
Table 7-6: Hardwired STO Electrical Specifications
Attribute Value
Safety inputs
(per channel)
Input current, typical 7 mA
Input ON voltage range 15…26.4V DC
Input OFF voltage, max 5V DC
Digital input type according to IEC 61131-2 24V DC Type 1
External power supply
*
* PELV rated power supplies must be used to energize external safety devices connected to the QSHT 5700
inverter safety inputs.
24V DC ±10% PELV
Input protection Optically isolated, reverse voltage
protected
OSSD short circuit test pulse width, max 700 µs
OSSD short circuit test pulse interval, min 100 ms
STO response time 12 ms