Contents1 Introduction 41.1 Purpose of the Manual 41.2 Intended Use 41.3 Unit Features 41.4 Front View 51.5 Hardware and Software Requirements 51.5.1 Compatibility 51.6 Additional Resources 51.7 Document Version 51.8 Compliance and Certifications 51.9 Disposal 52 Safety 62.1 Safety Symbols 62.2 Qualified Personnel 62.3 Safety Precautions 62.4 Risk Assessment 73 Functions 93.1 Safety Functions 93.1.1 Safe Torque Off - STO 93.1.2 Specification of Safety Functions 103.1.3 Activation of Safety Functions 103.1.4 Activation of STO from Multiple Sources 103.1.5 Functional Proof Tests 103.1.6 PFD and PFH Definitions 103.1.7 Internal Errors 103.2 Inputs and Output 113.2.1 Permitted Sensor Types on Digital Inputs 113.2.2 Inputs 113.2.3 Safe Option Monitoring (SO Mon) 113.2.4 Output 113.2.5 Signal Filtering 113.2.6 Stable Signal and Safety Devices 124 Installation 134.1 Safety Instructions 134.2 Installation Overview 134.3 Items Supplied 134.4 Mounting 13Contents Operating InstructionsMG37F102 Danfoss A/S © 10/2014 All rights reserved. 1