McQuay IM 743 Installation And Maintenance Manual Download

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IM 743-1

Component Data

Figure 2 shows the location of the major components of the Modbus Communication Module.

Figure 2. Modbus Communication Module Major Components

RS-485 Network Connetor

8-Pin Header

Modbus Connector

RS-485 Network Connector

This connector connects the Modbus Communication Module to the RS-485 network.

Pin

Function

Reference

Inverting Input

Non-inverting Input

8-Pin Header

The 8-pin header connects the MicroTech II Chiller Unit Controller to the Modbus Communication
Module.

Summary of Contents for IM 743

Page 1: ...Cooled Global Scroll ACZ Air Cooled Scroll Condensing Unit WGZ Water Cooled Global Scroll AGS Air Cooled Global Screw WGS Water Cooled Global Screw NOTICE Use this manual to physically install the com...

Page 2: ...to the Network 11 Network Topology 11 Addressing and Establishing Communications 11 Network Address and Baud Rate 11 Configuring the Unit Controller 11 Service Information 13 Test Procedures 13 Repla...

Page 3: ...ir Cooled Scroll Chiller Installation Operation and Maintenance Manual www mcquay com IOMM WGZ McQuay International MicroTech II Water Cooled Scroll Chiller Installation Manual www mcquay com IOMM WPV...

Page 4: ...hange any information contained herein without prior notice The user is responsible for determining whether this software is appropriate for his or her application The following are trademarks or regi...

Page 5: ...ules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment Operation of this equipment in a residential are...

Page 6: ...jor Components RS 485 Network Connetor 8 Pin Header Modbus Connector RS 485 Network Connector This connector connects the Modbus Communication Module to the RS 485 network Pin Function 1 Reference 2 I...

Page 7: ...rom the Serial Card slot if it hasn t already been removed Use a small screwdriver to pry the cover off from one end 4 Remove the plastic knockout in the cover 5 Figure 4 shows the Serial Card slot th...

Page 8: ...e of the network cable to Pin 2 of the connector plug b Connect the other wire to Pin 3 of the connector plug c No wire is connected to the remaining pin Figure 3 Serial Card Slot Location on Unit Con...

Page 9: ...IM 743 1 9 Figure 5 Network Cable Routing and Connections Figure 6 Network Connection Detail Net w ork Cab le Pin 3 Pin 2...

Page 10: ...the slot 10 Keeping the Modbus Communication Module level move it into the slot until you feel the connectors line up The correct position seems to be level toward the left side of the slot and down s...

Page 11: ...a MicroTech II Chiller Unit Controller is set in the unit controller keypad display The Modbus network address and data transmission rate Baud Rate is only available in the keypad display when the pr...

Page 12: ...d via the network or with the keypad display The appropriate Operation Manual provides default values and keypad operation The MicroTech II Chiller Modbus Protocol Information Document ED 15063 provid...

Page 13: ...ll does not respond contact the McQuay Controls Customer Support group at 866 4MCQUAY 866 462 7829 Replaceable Parts List Network Connection Plug Generic Replacement Parts If you lose this terminal bl...