Manual No. 21-115-527-024 rev02
Table of Contents
1 INTRODUCTION...............................................................................................................................................1
1.1 DESCRIPTION..................................................................................................................................................1
1.2 LED INDICATORS ...........................................................................................................................................1
2 TRANSMISSION METHODS...........................................................................................................................1
2.1 FIBER OPTIC TRANSMISSION ..........................................................................................................................2
2.2 WIRE TRANSMISSION......................................................................................................................................2
2.2.1 RS-232 ...................................................................................................................................................2
2.2.2 RS-485 ...................................................................................................................................................3
3 COMMUNICATION PROTOCOLS ................................................................................................................4
4 INSTALLING THE COMMUNICATIONS MODULE IN MJ- 4 CONTROL PANELS ...........................4
4.1 REMOVING THE MJ-4 REAR COVER................................................................................................................4
4.2 MOUNTING THE COMMUNICATIONS MODULE.................................................................................................5
4.3 SETTING THE COMMUNICATIONS MODULE JUMPERS......................................................................................6
4.3.1 Fiber Optic Interface.............................................................................................................................6
4.3.2 RS-232/485 Interface.............................................................................................................................6
4.4 REPLACING THE MJ-4 REAR COVER...............................................................................................................7
4.5 MOUNTING THE COMMUNICATIONS MODULE LABEL.....................................................................................7
5 INSTALLING THE COMMUNICATIONS MODULE IN MJ-X CONTROL PANELS............................8
5.1 SETTING THE COMMUNICATIONS MODULE JUMPERS......................................................................................8
5.2 MOUNTING THE COMMUNICATIONS MODULE IN MJ-X CONTROL PANELS.....................................................8
6 VERIFYING THE COMMUNICATIONS MODULE INSTALLATION ..................................................10
6.1 PERFORMING THE INITIAL DIAGNOSTIC CHECKOUT .....................................................................................11
6.2 PERFORMING THE LOOPBACK DIAGNOSTIC TEST .........................................................................................11
7 CABLING THE COMMUNICATIONS MODULE TO THE POWER SYSTEM.....................................12
7.1 FIBER OPTIC CABLE TYPE ............................................................................................................................12
7.1.1 Fiber Optic Cable Lengths ..................................................................................................................12
7.1.2 Fiber Optic Connector.........................................................................................................................12
7.1.3 Fiber Optic Connections......................................................................................................................13
7.2 RS-485 TWISTED-PAIR CABLE .....................................................................................................................13
7.2.1 RS-485 Cable Type ..............................................................................................................................13
7.2.2 RS-485 Cable Grounding ....................................................................................................................13
7.2.3 RS-485 Connector................................................................................................................................14
7.2.4 RS-485 Cabling Considerations ..........................................................................................................14
7.3 RS-232 CONNECTIONS .................................................................................................................................15
7.3.1 RS-232 Multi-drop Wiring...................................................................................................................16
7.4 RS-232/485 CONNECTIONS ..........................................................................................................................17
7.5 COMMUNICATIONS MODULE CONFIGURATION.............................................................................................17
7.5.1 Communications Menu Item Descriptions...........................................................................................18
7.6 TROUBLESHOOTING COMMUNICATIONS PROBLEMS .....................................................................................19
7.6.1 Using LEDs to Help Diagnose Communications Problems ................................................................20
7.6.2 Using MJXplorer to Troubleshoot Communications Problems...........................................................20
8 SETTING THE DNP POINTS.........................................................................................................................21
8.1 USING THE DNP CONFIGURE PROGRAM FOR A CUSTOM DNP POINT SET......................................................21
8.2 SELECTING A PREDEFINED DNP POINT SET...................................................................................................21
8.2.1 DNP point set for MJ-4A or MJ-4B.....................................................................................................21
8.2.2 DNP Point set for other Control Panels..............................................................................................21
8.2.3 2.x4 ......................................................................................................................................................22
8.2.4 Small 2.x3 ............................................................................................................................................23
8.2.5 Simple ..................................................................................................................................................24
8.2.6 Metering...............................................................................................................................................24
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