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Related Manuals for Siemens MJ-X Series
Summary of Contents for Siemens MJ-X Series
- Page 1 MJ-X™ Communications Module Fiber Optic and RS-232/485 Installation Manual POWER Watchdog Communications RS-232/485 Fiber Optic Communications Module Communications Module Data RS-232/485 Fiber Optic Version 2 Version 1 Manual No. 21-115527-013-01...
- Page 2 Siemens reserves the right to make changes in the specifications shown herein or to make improvements at any time without notice or obligations. Should a conflict arise between the general information contained in this publication and the contents of drawings or supplementary material or both, the letter shall take precedence.
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Page 3: Table Of Contents
MJ-X Communications Module Table of Contents INTRODUCTION ...............................1 ..............................1 ESCRIPTION LED I ........................2 RONT ANEL NDICATORS TRANSMISSION METHODS ...........................2 ..........................3 IBER PTIC RANSMISSION ............................3 RANSMISSION 2.2.1 RS-232 ..............................3 2.2.2 RS-485 ..............................4 ........................5 OMMUNICATION ROTOCOLS INSTALLATION (VERSION 2)........................5 ............................6 UMPER ETTINGS 3.1.1 Fiber Optic Version ..........................6 3.1.2... - Page 4 ABLE OMMUNICATIONS TEMS ACCESS is a trademark of Siemens Energy & Automation, Inc. MJ-X and MJXplorer are trademarks of Siemens Power Transmission & Distribution . Siemens is a registered trademark of Siemens AG. 1994 - 1999 Siemens Power Transmission & Distribution...
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Page 5: Introduction
Changer Control Panels. 1.1 Description The Siemens MJ-X Communications Module is the communication interface used to connect the MJ-X Control Panel to a network of regulator controllers, control devices, and supervisory equipment. The module is available with either a fiber optic or RS-232/485 interface. Figure 1-1 illustrates the Version 2 Communications Modules. -
Page 6: Front Panel Led Indicators
MJ-X Communications Module RS-232/485 Unit Fiber Optic Unit Power Power WDog WDog Comm Comm Data MJ-X MJ-X RS-232/485 Fiber Optic Communications Communications Module Module Figure 1-2 MJ-X Communications Modules, Version 1 (Expansion Rack Plug-in) 1.2 Front Panel LED Indicators The MJ-X Communications Module has five LED indicators. •... -
Page 7: Fiber Optic Transmission
MJ-X Communications Module 2.1 Fiber Optic Transmission The primary benefits of fiber optic communications are its immunity to induced electrical interference and relatively low signal loss. Electrical noise cannot be induced into the cable to generate transient spikes that disrupt data communications. -
Page 8: Figure 2-3 Modem Connection
If either the star or open-ended configurations are used, termination resistors must be installed at the end devices. For more information on installing RS-485 networks, refer to Siemens publication SG-6028, Installing the ACCESS™ System. The following characteristics determine the maximum length and data rate of an RS-485 network. -
Page 9: Communication Protocols
MJ-X Communications Module Twisted-pair Cabling MJ-X 4000 ft max. total MJ-X MJ-X Figure 2-4a RS-485 Configuration - Loop Network Twisted-pair Cabling MJ-X 4000 ft max. total MJ-X MJ-X Figure 2-4b RS-485 Configuration - Star Network Twisted-pair Cabling MJ-X 4000 ft max. total MJ-X MJ-X Figure 2-4c RS-485 Configuration - Open-Ended Network... -
Page 10: Jumper Settings
MJ-X Communications Module performed the system is ready for operation. The following sections describe setting the jumpers, installing, and testing the communications module. 3.1 Jumper Settings Prior to installing the communication module into the MJ-X Control Panel, ensure that the jumpers are properly installed on the printed circuit board. -
Page 11: Rs-232/485 Version
MJ-X Communications Module Table 3-1 Fiber Optic Version Jumper Settings Jumper Name Position Function Selected State Description Auto Repeat Auto Repeat Auto repeat for mark 0 or mark 1 No Repeat Force 0 No Repeat Force 1 (no jumper installed at 1-2 or 2-3) Range Normal Set Low Power Transmitter Output... -
Page 12: Communications Module Installation
MJ-X Communications Module 3.2 Communications Module Installation Follow these steps to install the Version 2 communications module in the MJ-X Control Panel. 1. If the control panel is installed on a regulating device, first turn off the MJ-X power, then disconnect the polarized disconnect switch (PDS) terminal block and remove the control panel from the housing. -
Page 13: Figure 3-4 Communicationsm
MJ-X Communications Module 6-32 x 3/8" Screw (6) Cover Pan 6-32 x 7/16" Male/Female Standoff (6) MJ-X Base Figure 3-4 Communications Module Installation MJ-X Control Panel Processor Board Membrane Switch Cable Communications Module Figure 3-5 Membrane Switch Cable Routing 7. Mount the communications module cover plate with six 6-32 x 3/8” screws as shown in Figure 3-4. 8. -
Page 14: Installation (Version 1)
MJ-X Communications Module 9. If you are installing the RS-232/485 version of the communications module, plug the power connector into J411 on the MJ-X Power Board as shown in Figure 3-6. POWER Wdog Comm Connector J105 Membrane Switch Cable Data Processor Board Connector J411 Power Board... -
Page 15: Expansion Rack Installation
MJ-X Communications Module 4.1 Expansion Rack Installation The expansion rack attaches to the MJ-X Control Panel. A power cable is supplied with the rack for connection to the control panel. Install the expansion rack using the following steps. 1. If the control panel is installed on a regulating device, first turn off the MJ-X power, then disconnect the polarized disconnect switch (PDS) terminal block and remove the control panel from the housing. -
Page 16: Figure 4-2 Expansion Racki
MJ-X Communications Module MJ-X Control Panel Expansion Rack J105 Expansion Rack Connector Connector Membrane Switch J208 Cable Processor Board Power Cable Connector Connector J411 J411 Power Board Side View Rear View With Rear Cover Removed Figure 4-2 Expansion Rack Installation 7. -
Page 17: Jumper Settings
MJ-X Communications Module 4.2 Jumper Settings Prior to installing the communication module into the MJ-X Control Panel, ensure that the jumpers are properly installed for all boards. Typically, only the jumpers on the transceiver board will have to be set. 4.2.1 Fiber Optic Board Configure the fiber optic transceiver board jumpers to enable proper communications between devices. -
Page 18: Rs-232/485 Board
MJ-X Communications Module Table 4-1 Fiber Optic Board Jumper Settings Jumper Name Position Function Selected State Description J603 RX State Mark 0 Idle line logical 0 (no optical energy in link for mark) Mark 1 Idle line logical 1 (optical energy in link for mark) J604 RX LED Mark 0... -
Page 19: Microprocessor Board
MJ-X Communications Module Figure 4-5 RS-232/485 Board Jumper Locations 4.2.3 Microprocessor Board The MJ-X Communications Module microprocessor board has three configurable jumpers. These jumpers are factory set and should not be adjusted. Figure 4-6 shows the location of the jumpers. They should be factory set to the positions listed in Table 4-3. -
Page 20: Module Installation
4. Firmly press the module into the rack until the module flanges are touching the rack. 5. Tighten the slotted screws on the module flanges to secure it in the rack. 6. Follow the Test procedure described in section 5 to test the communications module. SIEMENS Figure 4-7 Version 1 Module Installation 5 Testing Once the MJ-X Communications Module is installed, test the module as follows to ensure proper operation and performance. -
Page 21: Initial Diagnostic Checkout
This should take about 15 seconds. The Wdog LED will blink after the module successfully completes self-test and initialization. • xxx1 or xxx2 indicate an internal problem with the MJ-X Communications Module. Contact Siemens for assistance. 5.2 Loopback Diagnostic Test The loopback test evaluates the MJ-X for communications readiness. -
Page 22: Cabling
MJ-X Communications Module 6 Cabling Connect the communications modules using the recommended cable as described in section 6.1 below. The following sections provide some general guidelines for cable selection and explain the different cable parameters. Make connections between the device and the communications unit with the appropriate connector. Typically, RS-485 requires custom wiring to the other devices. -
Page 23: Fiber Optic Connections
MJ-X Communications Module 6.1.3 Fiber Optic Connections When making connections to the transmitter and receiver inputs/outputs, ensure that the transmit output from one device is connected to the receive input of the next device. Figure 6-1 shows how to insert the connector. The tip of the cable on the ST connector must be clean and free of dust. -
Page 24: Rs-485 Connector
MJ-X Communications Module MJ-X Communications Module Data Shield grounded Shield attached at other end only at this end only RS-485 Twisted-Pair Cable RS-485 Twisted-Pair Cable From RTU or other device To next device Figure 6-2 RS-485 Connection 6.2.3 RS-485 Connector The required connector for connecting to the MJ-X RS-232/485 Communications Module is the Phoenix Contact Screw Terminal Block MSTBT 2,5/8-ST-5,08 or equivalent. -
Page 25: Rs-232 Multi-Drop Wiring
MJ-X Communications Module Table 6-2 RS-232 Intelligent Electronic Device Wiring MJ-X RS-232/485 Personal computer, supervisory Communications Module device, or other network device Signal Ground Table 6-3 lists the connections that must be made to connect the MJ-X RS232/485 Communications Module to a modem. -
Page 26: Rs-232/485 Connections
MJ-X Communications Module Signal Ground (Signal) Shell (Frame Ground) Signal Ground (Frame) DB25 Ground (Signal) For Shielded Cable Connectors Shell (Frame Ground) Figure 6-5 RS-232 Connector Pinout 6.4 RS-232/485 Connections The screw terminal block connector is keyed for proper insertion. Figure 6-6 shows the proper connector orientation. -
Page 27: Table 6-4 Communicationsm
MJ-X Communications Module 3. To change the value of the parameter, press the Change key, and then use the scroll keys to toggle the choices or set the value for the parameter. Press the Save key after changing the value of a menu item to enter the changes, or press the Cancel Reset key to cancel the change. -
Page 28: Communications Menu Item Descriptions
MJ-X Communications Module 6.5.1 Communications Menu Item Descriptions Data Stat, DatPortBaud, and Data Parity These menu items apply only to the Data Port located on the front of the MJ-X Control Panel, and do not require modification. Reg Id (Regulator Identification) This item allows you to uniquely identify each regulator in the system. -
Page 29: Using Leds To Help Diagnose Communications Problems
MJ-X Communications Module 6.6.1 Using LEDs to Help Diagnose Communications Problems The communications module’s Txd and Rxd LEDs can be useful indicators to help isolate system communications problems. The LEDs are directly activated by the transmit and receive signals and provide an immediate indication of line activity. -
Page 30: Specifications
MJ-X Communications Module RS-232 RS-232 DE-9 DE-9 RS-232 Fiber Optic OTx/ORx MJ-X Fiber Optic Communications Module Power Supply Personal Computer Running MJXplorer RS-232 DE-9 MJ-X RS-232/485 Communications Module Personal Computer Running MJXplorer Figure 6-7 MJXplorer Troubleshooting Connections 7 Specifications This section contains the MJ-X Communications Module specifications. Contained in this section are the parameters for both the fiber optic and RS-232/485 module. -
Page 31: Fiber Optic Link Module Specifications
MJ-X Communications Module 7.2 Fiber Optic Link Module Specifications Transmitter Maximum Output Power -13.0 dBm (Long Range) -16.0 dBm (Normal Range) Typical Output Power -16.0 dBm (Long Range) -19.0 dBm (Normal Range) Minimum Output Power -20.0 dBm (Long Range) -23.0 dBm (Normal Range) Numerical Aperture 0.49 290 µm... - Page 33 Power Transmission & Distribution P.O. Box 6289 Jackson MS 39288 21-115527-013-01 Manual 6/99 ©1994-1999 Power Transmission & Distribution...