Manual No. 21-115527-017
Table of Contents
1 INTRODUCTION........................................................................................................................................ 1
1.1 DESCRIPTION........................................................................................................................................... 1
1.2 FRONT PANEL LED INDICATORS .............................................................................................................. 1
2 TRANSMISSION METHODS..................................................................................................................... 2
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-X
L
CONTROL PANELS....................... 5
4.1 REMOVING THE MJ-X
L
REAR COVER ........................................................................................................ 5
4.2 MOUNTING THE COMMUNICATIONS MODULE............................................................................................ 6
4.3 SETTING THE COMMUNICATIONS MODULE JUMPERS.................................................................................. 6
4.3.1 Fiber Optic Version ........................................................................................................................ 6
4.3.2 RS-232/485 Version ........................................................................................................................ 7
4.4 REPLACING THE MJ-X
L
REAR COVER........................................................................................................ 8
4.5 MOUNTING THE COMMUNICATIONS MODULE LABEL ................................................................................. 8
5 INSTALLING THE COMMUNICATIONS MODULE IN MJ-X CONTROL PANELS ......................... 9
5.1 SETTING THE COMMUNICATIONS MODULE JUMPERS.................................................................................. 9
5.1.1 Fiber Optic Version ........................................................................................................................ 9
5.1.2 RS-232/485 Version ...................................................................................................................... 10
5.2 MOUNTING THE COMMUNICATIONS MODULE IN MJ-X CONTROL PANELS ................................................ 10
6 VERIFYING THE COMMUNICATIONS MODULE INSTALLATION ............................................... 14
6.1 PERFORMING THE INITIAL DIAGNOSTIC CHECKOUT ................................................................................. 14
6.2 PERFORMING THE LOOPBACK DIAGNOSTIC TEST ..................................................................................... 14
7 CABLING THE COMMUNICATIONS MODULE TO THE POWER SYSTEM ................................. 15
7.1 FIBER OPTIC CABLE TYPE ...................................................................................................................... 15
7.1.1 Fiber Optic Cable Lengths............................................................................................................ 15
7.1.2 Fiber Optic Connector.................................................................................................................. 16
7.1.3 Fiber Optic Connections............................................................................................................... 16
7.2 RS-485 TWISTED-PAIR CABLE................................................................................................................ 16
7.2.1 RS-485 Cable Type ....................................................................................................................... 16
7.2.2 RS-485 Cable Grounding.............................................................................................................. 17
7.2.3 RS-485 Connector......................................................................................................................... 17
7.2.4 RS-485 Cabling Considerations .................................................................................................... 18
7.3 RS-232 CONNECTIONS .......................................................................................................................... 20
7.3.1 RS-232 Multi-drop Wiring............................................................................................................. 21
7.4 RS-232/485 CONNECTIONS.................................................................................................................... 21
7.5 COMMUNICATIONS MODULE CONFIGURATION ........................................................................................ 22
7.5.1 Communications Menu Item Descriptions ..................................................................................... 24
7.6 TROUBLESHOOTING COMMUNICATIONS PROBLEMS ................................................................................. 24
7.6.1 Using LEDs to Help Diagnose Communications Problems............................................................ 25
7.6.2 Using MJXplorer to Troubleshoot Communications Problems....................................................... 25
8 SPECIFICATIONS .................................................................................................................................... 27
8.1 PHYSICAL DIMENSIONS .......................................................................................................................... 27
8.2 FIBER OPTIC LINK MODULE SPECIFICATIONS........................................................................................... 28
8.3 RS-232/RS-485 MODULE SPECIFICATIONS ............................................................................................. 28
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