Installation; Sto Installation For Frequency Converters With Functional Safety Group 1 (Sto - Not Upgradable) - Danfoss iC7 Series Operating Manual

Operating Guide | iC7-Automation Functional Safety Functional Safety for Frequency Converters with STO, Not Upgradable (+BEF1)
Control board
41
+24V
44
+STO feedback
48
–STO feedback
45
GND
Figure 4: STO Feedback Example for iC7 Frequency Converters
The STO feedback works similar to a contactor which is closed as soon as both STO input channels are de-energized.

Installation

3.2
3.2.1 STO Installation for Frequency Converters with Functional Safety Group 1 (STO - Not
Upgradable)
Prerequisite: For motor connection, AC mains connection, and control wiring, follow the instructions for safe installation in the
documentation shipped with the drive.
All functional safety related wiring must be done on terminal blocks X31 and X32. See
If multi-stranded wires are used in the installation, ferrules or other suitable means must be used to prevent a single core from
short-circuiting with adjacent pins.
14 | Danfoss A/S © 2024.08
Load
Figure 5
NOTICE
for the location of the terminals.
AQ319741840653en-000401 / 136R0268