Thomas & Betts Limitorque MX Device Net Field Unit Introduction, Purpose How to Use this Manual

Limitorque MX DeviceNet Field Unit  FCD LMENIM2328-00 – 11/05

1 Introduction

1.1Purpose

This manual explains how to install and operate the Limitorque MX™/DeviceNet field unit (DNFU) and is to be used as an addendum to Bulletin LMENIM2306, Limitorque MX Installation and Operation Manual. Up to 63 actuators, each containing a DeviceNet field unit, may be connected by a single 5 strand, twisted-pair cable to form a DeviceNet network, two wires for connection to the data highway and two wires for connection to the DC power lines of the network highway, plus a screen connection. A suitable power supply and termination resistors on the highway are required in order for the FU to function correctly. This network permits the actuators to be operated by various control room devices such as a distributed control system (DCS), a programmable logic controller (PLC), or a personal computer (PC). The DeviceNet system communicates status and alarm data from each MX actuator.

1.2How to Use this Manual

Each section provides the MX user with information on installing and operating the MX DNFU.

Section 1, Introduction: Details user safety and knowledge requirements, system capabilities, and features.

Section 2, System Components: Focuses on the description of the DeviceNet system hardware and software components.

Section 3, Installation and Configuration: Provides details for installing and configuring a DNFU.

Section 4, Object Model Diagram: Provides a list of inputs and outputs supported through the Assembly

Object system information.

Section 5, View DeviceNet Status

Section 6, Associated Documents

Section 7, Troubleshooting

Section 8, How to Order Parts

Section 9, Regulatory Information

Section 10, Wiring Diagram

1.3User Safety

Safety notices in this manual detail precautions the user must take to reduce the risk of personal injury and damage to the equipment. The user must read and be familiar with these instructions before attempting installation, operation, or maintenance. Failure to observe these precautions could result in serious bodily injury, damage to the equipment, warranty void, or operational difficulty. User must follow local and state safety regulations.

Safety notices are presented in this manual in three forms:

c	WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow	
	warning notices could result in personal injury or death.
c

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