Installation; Safety Instructions; Installing Sto - Danfoss VLT AutomationDrive EZ FC 321 Operating Manual

Safe Torque Off
Operating Guide

3 Installation

3.1 Safety Instructions

ELECTRICAL HAZARD
The operator or electrical installer is responsible for proper grounding and compliance with all applicable national and local safe-
ty regulations.
See 2.5 Safety Precautions and the Operating Guide of the relevant drive. Also, always observe the instructions provided by the
motor manufacturer.

3.2 Installing STO

For motor connection, AC mains connection, and control wiring, follow the instructions for safe installation in the Operating Guide
of the drive.
Procedure
1. Remove the yellow jumper wire between control terminals 37 and 12 or 13.
Cutting or breaking the yellow jumper is not sufficient to avoid short-circuiting, see jumper on
Illustration 1: Jumper between Terminals 12/13 (24 V) and 37
2. For example, connect an external safety monitoring relay via an NO safety function to terminal 37 (STO) and either terminal
12 or 13 (24 V DC).
Connection and application examples are found in the chapter Application Examples.
3.
Complete wiring according to the instructions given in the Operating Guide of the drive.
10 | Danfoss A/S © 2022.11
C A U T I O N
Installation
Illustration 1.
AQ355238304444en-US0301 / 130R0955