Rockwell Automation 21G PowerFlex 750 Series Safe Torque Off - Manual (Page 24)

24 Rockwell Automation Publication 750-UM002F-EN-P - July 2013
Chapter 3 Installation and Wiring
Wiring Important points to remember about wiring:
• Always use tinned copper wire.
• Wire with an insulation rating of 600V or greater is recommended.
• Control wires should be separated from power wires by at least 0.3 meters
(1 foot).
Table 1 - Safe Torque Off Option Terminal Block Specifications
Table 2 - TB2 Terminal Designations
Important Safe Torque Off Option Module Installation Notes
Cabling
• Safety input wiring must be protected against external damage by cable
ducting, conduit, armored cable or other means.
• Shielded cable is required.
Power Supply Requirements
• The external power supply must conform to the Directive 2006/95/EC
Low Voltage, by applying the requirements of EN61131-2 Programmable
Controllers, Part 2 - Equipment Requirements and Tests and one of the
following:
– EN60950 - SELV (Safety Extra Low Voltage)
– EN60204 - PELV (Protective Extra Low Voltage)
– IEC 60536 Safety Class III (SELV or PELV)
– UL 508 Limited Voltage Circuit
– 24V DC ±10% must be supplied by a power supply that complies with
IEC 60204 and IEC 61558-1.
• For planning information, refer to the guidelines in Industrial Automation
Wiring and Grounding Guidelines, publication 1770-4.1 .
Wire Size Range Wire Type Strip Length
Maximum Minimum
0.8 mm
2
(18 AWG)
0.3 mm
2
(28 AWG)
Multi-conductor shielded
cable 10 mm
(0.39 in.)
20-750-S
Terminal Name Description
SP+ +24 Volt Safety Power User-supplied power: 24 volt ±10%
45 mA typical
SP- Safety Power Common
SE+ +24 Volt Safety Enable User-supplied power: 24 volt ±10%
25 mA typical
SE- Safety Enable Common
Sd Shield Terminating point for wiring shields when an EMC
plate or conduit box is not installed.
Sd Shield
Safety Input Connection Example
Power Supply
SP+
SE+
Sd
SP-
SE-
Sd
SE-
SP+
SP-
SE+
Sd Sd
Common
+24V
+24V
Common