Siemens MJ-5 User manual

Manual No. Draft rev02
MJ-5TM Communications Module
Fiber Optic and RS-232/485/ Network
Installation Manual for MJ-5TM Control Panels

DANGER
Hazardous Voltage.
Will cause death, serious injury, or equipment damage.
De-energize and ground the equipment before
maintenance.
Only qualified personnel should work on this equipment
after becoming thoroughly familiar with all warnings, safety
notices, instructions and maintenance procedures
contained herein. The successful and safe operation of this
equipment Is dependent upon proper handling, installation,
operation and maintenance.
The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user
of responsibility to use sound practices in application, installation, operation, and maintenance of the equipment purchased.
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 latter shall take precedence.
NOTE
Authorized and qualified Personnel
For the purpose of this manual a qualified person is one who is familiar with the installation, construction or operation of the
equipment and the hazards involved. In addition, he has the following qualifications:
(a) Is trained and authorized to de-energize, clear, ground, and tag circuits and equipment in accordance with established
safety practices.
(b) Is trained in the proper care and use of protective equipment such as rubber gloves, hard hat, safety glasses or face
shields, flash clothing, etc., in accordance with established safety practices.
(c) Is trained in rendering first aid.
SUMMARY
These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be
met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems
arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to the local sales office, listed on
the back of this instruction guide.
The contents of this instruction manual should not become part of or modify any prior or existing agreement, commitment or
relationship. The sales contract contains the entire obligation of Siemens Power Transmission & Distribution Inc. The warranty
contained in the contract between the parties is the sole warranty of Siemens Power Transmission & Distribution Inc. Any
statements contained herein do not create new warranties or modify the existing warranty.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
!

Manual No. Draft rev02
Table of Contents
1INTRODUCTION ...............................................................................................................................................1
1.1 DESCRIPTION..................................................................................................................................................1
2TRANSMISSION METHODS...........................................................................................................................1
2.1 FIBER OPTIC TRANSMISSION ..........................................................................................................................1
2.2 WIRE TRANSMISSION .....................................................................................................................................2
2.2.1 RS-232 ...................................................................................................................................................2
2.2.2 RS-485 ...................................................................................................................................................3
3COMMUNICATION PROTOCOLS ................................................................................................................4
4INSTALLING THE COMMUNICATIONS MODULE IN MJ-5 CONTROL PANELS.............................4
5CABLING THE COMMUNICATIONS MODULE TO THE POWER SYSTEM.......................................4
5.1 FIBER OPTIC CABLE TYPE ..............................................................................................................................5
5.1.1 Fiber Optic Cable Lengths ....................................................................................................................5
5.1.2 Fiber Optic Connector...........................................................................................................................5
5.1.3 Fiber Optic Connections........................................................................................................................5
5.2 RS-485 TWISTED-PAIR CABLE .......................................................................................................................6
5.2.1 RS-485 Cable Type ................................................................................................................................6
5.2.2 RS-485 Cable Grounding.......................................................................................................................6
5.2.3 RS-485 Connector..................................................................................................................................6
5.2.4 RS-485 Cabling Considerations ............................................................................................................6
5.3 RS-232 CONNECTIONS ...................................................................................................................................8
5.3.1 RS-232 Multi-drop Wiring.....................................................................................................................9
5.4 RS-232/485 CONNECTIONS ............................................................................................................................9
5.5 COMMUNICATIONS MODULE CONFIGURATION (REFERENCE 4.7).................................................................10
5.5.1 Communications Menu Item Descriptions...........................................................................................11
5.6 TROUBLESHOOTING COMMUNICATIONS PROBLEMS.....................................................................................14
5.6.1 Using MJXplorer to Troubleshoot Communications Problems...........................................................14
6SETTING THE DNP POINTS.........................................................................................................................15
6.1 USING THE DNP CONFIGURE PROGRAM FOR A CUSTOM DNP POINT SET......................................................15
6.2 SELECTING A PREDEFINED DNP POINT SET...................................................................................................16
6.2.1 DNP point set for MJ-5........................................................................................................................16
6.2.2 DNP Point set for other Control Panels..............................................................................................16
6.2.3 2.x4 ......................................................................................................................................................16
6.2.4 Small 2.x3 ............................................................................................................................................17
6.2.5 Simple ..................................................................................................................................................18
6.2.6 Metering...............................................................................................................................................19
6.2.7 Active ...................................................................................................................................................20
6.2.8 Set 7 .....................................................................................................................................................21
6.2.9 2.x3 ......................................................................................................................................................22
7SPECIFICATIONS ...........................................................................................................................................29
7.1 PHYSICAL DIMENSIONS ................................................................................................................................29
7.2 FIBER OPTIC LINK INTERFACE SPECIFICATIONS ...........................................................................................29
7.3 RS-232/RS-485 INTERFACE SPECIFICATIONS...............................................................................................29
500 C, 1 MINUTE.....................................................................................................................................................29
8 MASTER SLAVE CONFIGURATION………………………………………………………………………………28

ii
Figures
FIGURE 1-1: MJ-5 COMMUNICATIONS MODULE FIGURE 1-2: BACK OF MJ-5..........................................................1
FIGURE 2-1: FIBER OPTIC NETWORK..............................................................................................................................2
FIGURE 2-2: RS-232 CONNECTION.................................................................................................................................2
FIGURE 2-3: MODEM CONNECTION ................................................................................................................................2
FIGURE 2-4: RS-485 CONFIGURATION –LOOP NETWORK..............................................................................................3
FIGURE 2-5: RS-485 CONFIGURATION –STAR NETWORK ..............................................................................................3
FIGURE 5-1: FIBER OPTIC CONNECTIONS .......................................................................................................................5
FIGURE 5-2: RS-485 CONNECTION.................................................................................................................................6
FIGURE 5-3: SCREW TERMINAL BLOCK CONNECTOR .....................................................................................................6
FIGURE 5-4: RS-485 LOOP TOPOLOGY...........................................................................................................................7
FIGURE 5-5: COMMUNICATION CABLE ROUTING............................................................................................................8
FIGURE 5-6 : RS-232 MULTI-DROP CONFIGURATION .....................................................................................................9
FIGURE 5-7: RS-232 CONNECTOR PINOUT .....................................................................................................................9
FIGURE 5-8: SCREW TERMINAL CONNECTION................................................................................................................9
FIGURE 5-9: MJXPLORER TROUBLESHOOTING CONNECTIONS .....................................................................................15
Tables
TABLE 5-1 RS-485 CABLE SPECIFICATIONS ...................................................................................................................6
TABLE 5-2 RS-232 INTELLIGENT ELECTRONIC DEVICE WIRING ....................................................................................8
TABLE 5-3 MODEM WIRING ...........................................................................................................................................8
TABLE 5-4 COMMUNICATIONS MENU ITEMS................................................................................................................10
MJ-5, and MJXplorer are trademarks of Siemens Industry, Inc.
Siemens is a registered trademark of Siemens AG.
1994 - 2008 Siemens Industry, Inc.

MJ-5 Communications Module
1
1 Introduction
This manual describes the installation and connection procedures for the MJ-5TM Communications Module which
has the Fiber Optic and RS-232/485, and networking interfaces combined in one single printed circuit board. The
operation and functionality of the Fiber Optic and the RS-232-/485 interfaces are quite similar, only one of the
interfaces can be used at a time. The manual covers the procedures for connecting the module to a system of
networked MJ-5 Tap Changer Control Panels.
1.1 Description
The Siemens MJ-5 Communications Module is the communication interface used to connect the MJ-5 Control Panel
to a network of regulator controllers, control devices and supervisory equipment. Figure 1-1 illustrates the MJ5
Communications Module.
The fiber optic interface enables connection of the tap changer control panel to the supervisory equipment via
multimode fiber optic cable. The RS-232/485 interface enables connection of the tap changer control panel to the
supervisory equipment via electrical wire.
The MJ-5 Communications Module is installed in MJ-5 Tap Changer Control Panels. This allows you to easily
network the control panels and other field devices to a remote terminal unit (RTU) or other supervisory device. An
adapter kit is available for mounting MJ-5 Communications Modules in MJ-X Control Panels.
Figure 1-1: MJ-5 Communications Module Figure 1-2: Back of MJ-5
2 Transmission Methods
There are two transmission mediums available for sending data to the RTU:
fiber optic
wire
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.
RS-232/RS-485
Serial fiber ST
Ethernet
fiber ST/LC

2
The Fiber Optic interface on the Communications Module uses multi-mode fiber optic cable. The electrical signals
are converted to optical signals by the communication unit. The optical signals are then transmitted via the fiber
optic cable to the RTU. Communications modules in the path between the transmitting communications module and
the RTU act as repeaters and simply regenerate the signals and forward them to the next device as seen in Figure 2-
1.
Figure 2-1: Fiber Optic Network
2.2 Wire Transmission
The advantage of wire transmission is simple installation. The MJ-5 supports two popular wire interfaces: RS-232
and RS-485. The screw terminal block connector supplied with the module can be wired for either interface.
Connection to the supervisory device is typically accomplished using a DB-9 (DE-9) connector for RS-232, while
the connector used for RS-485 will vary with the application.
2.2.1 RS-232
Direct RS-232 connections are limited to a maximum distance of 50 feet, Figure 2-2. The RS-232/485 interface on
the MJ-5 Communications Module supports RS-232 multi-drop configurations.
The distance between devices may be extended with modems, Figure 2-3. Modem connections are either dial-up,
short-haul, or radio-based. Dial-up modems are typically deployed when there is easy access to the telephone
connections, while short-haul modems are useful within a facility where there is access to the wiring. Consider using
a radio modem when laying cable for a land-line modem is impractical.
Figure 2-2: RS-232 Connection
Figure 2-3: Modem Connection

MJ-5 Communications Module
3
2.2.2 RS-485
The maximum distance for RS-485 is 4000 feet, either from device to device or for an entire loop. The
recommended cable for RS-485 is shielded, two twisted-pair, 22 AWG. This type of cable consists of jacketed wire
that is twisted together and wrapped in a shield to prevent electromagnetic interference from affecting the data
signal. A maximum of 32 devices can be connected to an RS-485 network. Typical network configurations are loop,
star, and open-ended. These are shown in Figures 2-4 to 2-6. The recommended network configuration is a loop.
This will ensure that all devices remain connected to the master unit in the event of a line break. If the loop
configuration does not allow you to place the equipment in the desired location, connect the network open ended.
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 Section 5.2 RS-485 Twisted-pair Cable. The following
characteristics determine the maximum length and data rate of an RS-485 network.
Impedance: The maximum transfer of energy occurs when the cable’s terminating impedance matches the
characteristic impedance of the cable. If the cable’s characteristic impedance is 120 ohms, use a 120 ohm
terminating resistor.
Capacitance: Wire capacitance affects the rise and fall times of a transmitted signal and, as a result, limits the
signaling (baud) rate of the data. The higher the capacitance is in a wire, the lower the maximum baud rate of
the wire. Additionally, higher capacitance requires higher output current to drive the line. Since capacitance is
proportional to wire length, it can limit the maximum cable length for a given baud rate.
Cable Size: Cable size along with capacitance and DC resistance determine whether the cable is suitable for the
application. A 22-gauge cable will provide a proper balance of capacitance and resistance.
DC Resistance: DC resistance determines the maximum length of wire allowed for an application. The
maximum length is determined by the resistance of each twisted pair along with the device termination
resistance. The use of surge protectors with series resistance also contributes to loop resistance.
Figure 2-4: RS-485 Configuration –Loop Network
Figure 2-5: RS-485 Configuration –Star Network
Figure 2-6: RS-485 Configuration –Open-Ended Network

4
3 Communication Protocols
The MJ-5 Control Panel is designed to be used in a network of intelligent power control devices communicating
with a supervisory device or remote terminal unit (RTU). Each device on the network has a specific communications
address assigned to allow messages to be directed to and from the device. Messages are transmitted from the RTU to
all devices and only the device with the specified address will respond. The MJ-5 Communications Module supports
the following protocols. Refer to the documents listed for details about the protocols.
Distributed Network Protocol (DNP 3.0). (See User’s Group website: www.dnp.org)
The Cooper 2200 Protocol (with or without address byte)
The 2179 Protocol ( Based on the PG&E Protocol)
4 Installing the Communications Module in MJ-5 Control Panels
The MJ-5 Communications Module is mounted directly on the MJ-5 Main Processor Board. Follow these steps to
install the communications module. Details are provided in the sections below.
1. Turn off power to the MJ-5.
2. If in a regulating device, then disconnect the polarized disconnect switch (PDS).
3. Install the communications module.
5 Cabling the Communications Module to the Power System
Connect the communications modules using the recommended cable as described in sections 5.1 to 5.3 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. Consult the device’s pin assignments to determine
the applicable connections. Typically, a DB-9 (DE-9) will be needed for making RS-232 connections to the RTU,
personal computer, or other device. Use the supplied Phoenix Contact Screw Terminal Block (MSTBT 2, 5/8-ST-5,
08) for connections to the RS-232/485 interface. Use an ST optical connector when making connections to the fiber
optic interface.
Though the cabling for the Fiber Optic and the RS-232-/485 interfaces may be done and either interface may be
made available for communication, only one of the interfaces may be used at a time.
WARNING
120 volts on terminal block, leads, and
inside control panel housing.
May result in death or serious injury
from electric shock including equipment
damage.
Disconnect all power sources before
opening the control panel.

MJ-5 Communications Module
5
5.1 Fiber Optic Cable Type
The recommended cable is 62.5/125 m diameter fiber optic cable with a maximum attenuation of 5dB/km at a
wavelength of 820-850 nm. If this is not available use 50/125 m diameter glass cable, but only for cable lengths
less than 1500 feet. Use of 50/125 m diameter cable requires that the range jumper J12 be set for long range. This
will provide protection against under driving the receiver. When using 50/125m cable, install the long range
jumper (J12) even for very short cable lengths.
A 100/140 m diameter cable can also be used for cable lengths less than 1500 feet. Use of this cable requires that
the range jumper (J12) be set to normal. This setting will provide protection against overdriving the receiver.
Plastic cable is not recommended due to the coupling efficiency of the cable, which at short lengths will overload
the optical receiver. In addition, the large cable attenuation normally associated with plastic cable limits the useful
link lengths to a fraction of that achievable with glass cable.
5.1.1 Fiber Optic Cable Lengths
Calculate cable length by determining the output power of the transmitter (PTX) and the input receive level (Peak
Input Power Logic Level Low Receiver Sensitivity, PRX). The difference between the two numbers is the optical
power budget (PB’).
PB’ = PTX –PRX
For example, if transmitter output power is -16 dBm and the input receive level is -24 dBm, the optical power
budget is then 8 dBm. Subtract from this value the fixed losses (i.e. connector losses, splice losses, PLoss) to obtain
the real power budget (PB).
PB= PB’ –PLoss
Divide the result by the cable attenuation (Att) in dB/km to arrive at the maximum cable length. Note that the
transmitter output power data given in the specifications already includes connector loss when using precision
ceramic ST connectors.
Length = PB/ Att
5.1.2 Fiber Optic Connector
The fiber optic cables (or “patch cords”) used with the MJ-5 Fiber Optic Communications Module must be
terminated with ST style connectors and have a numerical aperture of 0.275 ± 0.015.
(If pre-terminated cables are not used, follow the instructions supplied by the manufacturer to attach the connector to
the fiber cable using the cable type recommended in section 7.1.)
5.1.3 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 7-1 shows how to insert the connector. The tip of
the cable on the ST connector must be clean and free of dust. Dust on the tip of the cable will cause signal
attenuation.
Use care when handling the fiber optic connector, especially the exposed ceramic ferrule.
Figure 5-1: Fiber Optic Connections

6
5.2 RS-485 Twisted-pair Cable
The following sections provide the information necessary to select and install cable between an MJ-5 Control Panel,
RTU, and other field devices in an RS-485 network.
5.2.1 RS-485 Cable Type
Listed in Table 7-1 are the cable characteristics necessary for proper electrical performance in an RS-485
communications network. Use cable with a shield that provides 100 percent RFI/EMI coverage.
Table 5-1 RS-485 Cable Specifications
Characteristic
Value
Maximum/Typical
Impedance
120 ohms
Typical
Capacitance (pF/ft)
35
Maximum
Cable Size
22 AWG
Typical
DC Resistance
17 ohms/1000 ft
Maximum
Velocity of Propagation
80%
Maximum
5.2.2 RS-485 Cable Grounding
Ground the cable shield for all devices on the network. Ground the cable shield at only one end to prevent induced
interference that may result from circulating ground currents. If a cable shield is grounded at both ends, a ground
loop can exist between the components. This ground loop can cause induced interferences that result in signal
distortion. If there is a ground potential rise between the connected devices, connect the Signal Return (RTN)
between the communication devices. Figure 7-2 illustrates the preferred field device connection method. See section
Error! Reference source not found. for jumper considerations.
Figure 5-2: RS-485 Connection
5.2.3 RS-485 Connector
The required connector for connecting to the MJ-5 RS-232/485 Interface is the Weidmuller Contact Screw Terminal
Block BLT 5.08/8/180 or equivalent. Wire the connector as shown in Figure 7-2. This connector is supplied with the
communications module and is shown in Figure 7-3.
Figure 5-3: Screw Terminal Block Connector
5.2.4 RS-485 Cabling Considerations
The cable used for connecting the Communications Module to other communication devices is a twisted pair of
insulated conductors. The pair is twisted to minimize pickup of random signals between the conductors, particularly
those signals induced by electromagnetic interference (EMI).
12 Gauge Wire (maximum)
Weidmuller Terminal Block
BT 5.08/8/180
.3”

MJ-5 Communications Module
7
To further protect against external electrical interference, the pair is shielded by a grounded outer covering. The
shield conducts radio frequency interference (RFI) to the ground, thus reducing its effect on the twisted pair.
Concern over RFI and EMI is important given the high electrical current and electrically noisy environment through
which the communication wires are routed.
Follow the rules below to properly install the RS-485 cables.
1. Connect all field devices in a loop technology so that all devices are connected to the master in case of a line
break. The basic loop topology is shown below.
Figure 5-4: RS-485 Loop Topology
One of the advantages of the loop topology is that if a line is cut, communication is not interrupted. By
completing the loop in the RS-485 cable, one break can be made anywhere in the line without compromising
communication with the master device (RTU). To maintain redundancy, avoid open ended runs of the bus.
Each installation method (see Figures 2-4 to 2-6) has advantages and disadvantages. The loop method requires
more cable than does the single-ended run method. This extra cable is needed to run from the last device on the
run to the master device (RTU). The additional cable adds expense and shortens the total distance the farthest
device can be located from the master device. The advantage of the loop method is in the ability to
communicate with all devices when there is a break in the loop.
The single-ended run allows larger distances between the master device and the farthest slave device, but it does
not allow the master device to communicate with devices on the far side of a break. This method also requires
the use of terminating resistors.
2. A maximum of 32 devices may be connected in a single RS-485 bus with a total cable run no longer than 4000
feet.
3. Always ground the shield at only one end of a cable segment. For all devices, ground the cable shield at one end
only to prevent induced interference that may result from circulating ground currents. If a cable’s shield is
grounded at both ends, a ground lop can exist between the components. This ground loop can result in induced
interference that causes signal distortion. Figure 7-2 shows the proper method for terminating the shield at the
Communications Module connector.
4. When the Communications Module is mounted in the MJ-5 Control Panel, it is grounded internally through the
MJ-5 to the equipment ground. A separate connection to the equipment ground is not required.
5. The recommended twisted-pair cable for an RS-485 bus has a characteristic impedance of 120 ohms. Any
change in the type of cable, or an open-ended length of cable, creates a discontinuity in the impedance and
causes a reflection. Placing resistors that match the characteristic impedance of the cable at the open end of a
twisted-pair stub eliminates reflection.
For long, single-ended runs (over 1000 Forwarding ft.), you may need to install a 120 ohm terminating resistor
between the data (+) and (-) terminals of the farthest device from the RTU or master end. Adding the
terminating resistor is not an absolute requirement, but using it minimizes reflected interference on the
communication cable.
6. Do not route signal cabling parallel to power conductors. Wherever possible, place the communication cable
perpendicular to the power conductor as shown below. Power conductors are any cables or bus conductors
carrying currents greater than 20 amperes.

8
Figure 5-5: Communication Cable Routing
Electrical current flowing through a conductor forms a magnetic field around the wire as shown above.
Interference is coupled into the wires in the cable through electromagnetic fields. Just as current through a wire
causes a magnetic field to form around it, a magnetic field can cause current to flow in a wire. This induction of
current is a function of the geometry or orientation of the wires. If the communication cable is at a right angle
with the power conductor, it is aligned with the direction of the magnetic field and no current is induced.
7. Follow these guidelines when you route communications cables between electrical equipment:
Run communications cables in the same cable raceways (cable routes, cable trays, or cable gutters) as
unshielded digital and analog signal cables up to 60 V.
Run communications cables in the same cable raceway with shielded signal and supply cables up to 230 V.
Run communications cables 4 inches away from unshielded signal and supply cables of up to 230 V.
Run cables with voltages greater than 230 V in separate ducts (routes, conduits).
5.3 RS-232 Connections
The following section describes the connection requirements for RS-232 cable. This cable will allow you to connect
the MJ-5 Control Panel to an RTU or personal computer.
Five of the standard RS-232 wires are used for this application.
Signal Return (RTN)
RXD
TXD
CTS
RTS
Table 7-2 lists the connections that must be made to connect the RS232/485 interface to a personal computer, RTU,
or other supervisory device. The MJ-5 Communications Module defaults to no-handshaking-required mode.
However, the communications module asserts RTS while it transmits data, but the module will ignore the CTS input
signal.
Table 5-2 RS-232 Intelligent Electronic Device Wiring
MJ-5 RS-232/485
Communications Interface
Personal computer, supervisory
device, or other network device
RTN
Signal Ground
RXD
TXD
TXD
RXD
Table 7-3 lists the connections that must be made to connect the RS232/485 interface to a modem.
Table 5-3 Modem Wiring
MJ-5 RS-232/485
Communications Interface
Modem
Current
Flow
Magnetic Field
Around Conductor
Electric Power
Conductor
Communication Cable

MJ-5 Communications Module
9
RTN
Signal Return
RXD
RXD
TXD
TXD
RTS
RTS
CTS
CTS
“RXD” is an input for Data Terminal Equipment (DTE) and an output for Data Communications Equipment (DCE).
“TXD” is an output for the DTE and an input for the DCE. Personal computer serial ports are configured as DTE
and the modems are configured as DCE. The communications module RS-232 connections implement DTE.
5.3.1 RS-232 Multi-drop Wiring
Multi-drop configurations require that the respective pins of the DTE devices be connected in parallel, Figure 7-6.
The standard pin assignments for RS-232 connectors are shown in Figure 7-7.
Note: For Figure 7-6, the RTU port is wired as “DTE”. When networking devices together, make sure the RTU
“data out” connects to the communications module Rxd, and the RTU “data in” connects to the communications
module Txd.
Figure 5-6 : RS-232 Multi-drop Configuration
Figure 5-7: RS-232 Connector Pinout
5.4 RS-232/485 Connections
The screw terminal block connector is keyed for proper insertion. Figure 7-8 shows the proper connector orientation.
Align the keys and insert the connector to interface to the RS-232/485 interface.
Figure 5-8: Screw Terminal Connection
1
1
69
513
14 25
Pin
Pin 1
12
23
34
45
56
67
78
820
922
*
*
*
Signal
Signal Ground (Frame)
DCD Txd
Txd Rxd
Rxd
RTS
DTR CTS
DSR
DSR Ground (Signal)
Ground (Signal)
DCD
RTS
DTR
CTS
RI RI
Shell (Frame Ground)
For Shielded Cable Connectors
Shell (Frame Ground)
DE9 DB25
GND
RTN Data
Rxd
Txd
CTS RTS

10
5.5 Communications Module Configuration (reference 4.7)
Prior to using the MJ-5 Communications Module in the network, the communications module needs to be
configured properly for communications. The < COMMUNICATIONS > menu of the MJ-5 Control Panel provides
all the required communications configuration items for the communications module. Table 7-4 lists the
communications menu items in the order in which they appear on the MJ-5 Control Panel; default settings are in
bold.
1. Program the communications parameters of the MJ-5 Communications Module by pressing the Menu key twice
to display the < METER > menu.
2. Then press the left arrow key until the < COMMUNICATIONS > menu appears. Use the up and down arrow
keys to access the individual menu items.
3. To change the value of the parameter, press the Change key, and then use the arrow 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.
Each time a configuration menu item is changed, the communications module is reset by the main MJ-5 Control
Panel. This reset is part of the process of updating the communications module with the new configuration.
Table 5-4 Communications Menu Items
DATA ITEMS
DESCRIPTION
SELECTIONS
DatPortBaud
Local Data Port transmission rate
300, 1200, 2400, 4800, 9600, or 19200
Data Parity
Local Data Port Parity Setting
EVEN or NONE
DataPortAddr
Enables/Disables Addressing for Data Port
OFF or ON
Reg ID
Regulator Identification Number (Note: This is NOT the address for Data Port Communications)
NNNNN (Range 0-32765)
Protocol
Communications Module Protocol
DNP3.0, 2200, 2200NPA, MJ3A A, MJ3A
B1, MJ3A B2, 2179, and Special
CommBaud
Communications Module transmission rate
300,1200,2400,4800,9600 or 19,200
CommParity
Communications Module Protocol
NONE, EVEN, ODD
CommAddr
Communications Module Address
NNNN (range:0-32765)
Resync Time
Communications Module resync time (in characters). Used for Communications Module
protocols 2200 and 2179 to determine when one message ends and another message begins
NNN (range 0-250, 1)
TxEnDelay
Communications Module Transmit Enable Delay (in milliseconds), Specifies the amount of time
between the RTS output being activated and the start of transmit (output) data.
NNN (range 0-250)
DnpDlConfirm
DNP Data Link Confirm
Y or N
SW repeat
Enable Fiber loop
Y or N
HostAddr
Host Address for Unsolicited Responses
NNN (range 0-65535)
CMUnsolicited
Unsolicited Responses
Y or N
AutoInhEnable
Auto Inhibit Enables (Y) Remote Raise/Lower. If disabled, (N) activates automatic operation
Y or N
DNP set
Select a predefined or custom DNP point set
DNPcfg. 2x3, 2x4, etc.
Deadband CL-1
Class 1--Used to set band without configuration tool
00.0 or NN.N
Deadband CL-2
Class 2---Used to set band without configuration tool
00.0 or NN.N
Deadband CL-3
Class 3---Used to set band without configuration tool
00.0 or NN.N
CommType
Describes the type of communication
Network, Serial, Fiber-serial or RS-485
IP config
Enables/Disables IP Configuration Selection
Static or DHCP

MJ-5 Communications Module
11
IP-
192:168:001:200
Displays current IP address
192.168.1.200 or xxx.xxx.xxx.xxx
NM-
255:255:255:000
Displays current Network Mask
255.255.255.0 or
xxx.xxx.xxx.xxx
GW-
000:000:000:000
Displays current Gateway
192.168.1.1 or xxx.xxx.xxx.xxx
TCP port
DNP Communication Port Number
20,000 or NN,NNN (not advisable to
change)
DNP Version
Displays the DNP Software version in use
XXXX
SL
IP Address for future network based firmware upgrades
ALTERNATE USE: IP address for slave 1 in Master Slave Configuration
XXX.XXX.XXX.XXX
SL2
IP Address for future network based firmware upgrades
ALTERNATE USE: IP address for slave 2 in Master Slave Configuration
XXX.XXX.XXXXXX
VCA mode
Enables/Disables Heartbeat feature
ON or OFF
AutoInhbTout
Controls time of Heartbeat
NNN (range 000-255)
5.5.1 Communications Menu Item Descriptions
Data Stat, DatPortBaud, Data Parity, and DataPortAddr
These menu items apply only to the Data Port located on the front of the MJ-5 Control Panel, and do not require
modification.
Reg Id (Regulator Identification)
This item allows you to uniquely identify each regulator in the system. The Regulator Id is accessible as a data item
via the communications module for most of the protocol selections.
Protocol
This item defines the protocol selection for the MJ-5 Communications Module. The selections are listed in Table
7-4.
2200NOA is a variation of the 2200 protocol with the address field suppressed. It is provided for testing the MJ-5
Communications Module with the MJXplorersoftware. The SPECIAL item allows a new protocol handler to be
included in the Communications Module code without forcing a modification to the Main Processor code (for the
protocol selection front panel screen).
Comm Baud
This menu item defines the data rate for the MJ-5 Communications Module. The standard asynchronous
communications data rates are available for selection. For proper communications, the Comm Baud setting must
match the baud setting of the other communicating device(s) in the network.
Comm Parity
This configuration item defines the parity selection for the communications module. For proper communications, the
Comm Parity setting must match the parity setting of the other communicating device(s) in the system.
This parity selection will override any default or inherent parity defined in the selected protocol. [For example, the
2200 protocol specification document defines the parity as even. The Comm Parity configuration item allows even
parity to be selected, but it also permits the system designer/installer to use an alternate parity selection if desired.]
Comm Address

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This configuration item defines the communications address for the communications module. Each device
connected on the communications link must have a unique communications address. The Comm Address setting
must correspond with the address programmed into the RTU or other supervisory device so that it can request
information from and write data to a particular MJ-5 Control Panel.
Resync Time
This configuration item defines the Communications Module resync time (in characters). This item is used for
Communications Module protocols 2200 and 2179 to determine when one message ends and another message
begins. If a new character is not received within the period specified by this parameter, the control panel assumes
that the next received character is the start of a new message.
Tx En Delay
This configuration item defines the Communications Module Transmit Enable Delay (in milliseconds), specifies the
amount of time between the RTS output being activated and the start of transmit (output) data.
DNP dl Confirm
This configuration item defines whether or not to request confirmation from the master station for all responses for
the DNP3.0 protocol
CM SW RepeatEn
This configuration item controls whether software repeat is used for the MJ5.
Host Addr
This configuration item defines the communications address for the RTU or other supervisory device to which
unsolicited responses are sent.
CM Unsolicited
This configuration item defines whether or not the communications module should send unsolicited responses. Note
that if this parameter is “Y”, an “enable unsolicited responses” message must also be sent from the master station to
start them.
AutoInhEnRemRL
This configuration item controls whether the auto inhibit must be active before a remote raise or lower request will
be followed. Setting “Y” prevents accidental fighting against the automatic tap changes with remote commands.
DNPset
This configuration item selects what DNP points will be used. Choose “DNPcfg” to configure your own points with
the DNP Configure program or choose from the preconfigured DNP point sets. See Section 8.
Deadband Class 1-3
These three menu items are used for Deadband Class 1, 2, or 3. If the user wants to set the band without using the
configuration tool, they can select the value of Deadband Class 1, 2, or 3. The default value for each Deadband
Class is 00.0 and the maximum value is 99.9.
Comm Type
This menu item displays which communication type is currently being used by the MJ-5. The user may select from
Network, Fiber-serial, Serial, or RS-485.
IP Config
This menu item allows the user to enable or disable the IP Configuraion Selection. This user may choose between
Static, (the default) or DHCP.

MJ-5 Communications Module
13
IP
This menu item displays the current IP Address. The user may change the IP Address by pushing the change/save
button and using the up/down Navigations keys to increase or decrease each digit, or use the default address of
192.168.1.200
Network Mask
This menu item displays the current address for the Network Mask. The user may change the address by following
the instructions found under IP Address.
Gateway
This menu item displays the current address for the Gateway. This user may change the address by following the
instructions found under IP Address.
TCP Port
This menu item displays the DNP Communications Port number. Although the user may change the Port number
from the default of 20,000, it is NOT ADVISABLE.
DNP Version
This menu item displays the DNP Software version in use.
SL
This menu item displays the IP Address for future network based firmware upgrades. The SL function may also be
used to establish the IP address for Slave 1 in the Master Slave Configuration.
SL2
This menu item displays the IP Address for future network based firmware upgrades. The SL function may also be
used to establish the IP address for Slave 2 in the Master Slave Configuration
VCA Mode
This menu item enables the Heartbeat feature in the Control Panel. The Heartbeat feature is activated when the
VCA mode is turned ON. On receiving heartbeat two times within 30 seconds Control will activate Auto-inhibit
and blocks automatic operation. If the Remote connection is lost, and the Control Panel does not receive another
Heartbeat, the Control Panel will disable the Auto-Inhibit and regain control through automatic regulation.
To enable the Heartbeat feature
1. Turn VMA Mode to the ON position by pressing the Change/Save button, and then pressing the Up/Down
Navigational keys to toggle between ON/OFF.
2. The user may set the timeout period (0-255) for the Heartbeat feature in the AutoInhbTout or Auto Inhibit Time
Out function found also in the Communications menu.

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3. The Binary output point number (last point number +1, commonly point 4) will be activated as IVVCACTIVE
and the Binary input –(last input +1) will indicate the status of IVVCACTIVE.
4. The user must send the command (binary output 4) as a heartbeat two times within 30 seconds.
5. The IVVC will become ACTIVE.
6. The user should then set to the Remote Auto Inhibit to ON to block automatic operation.
7. Continue sending the Binary Output 4 command as a Heartbeat.
8. If the Control doesn’t receive any Heartbeat signals within the range set on the Auto-Inhibit Timeout feature, the
IVVC will get deactivated and the Remote Auto-Inhibit will turn off to enable the Automatic Operation to
reestablish
5.6 Troubleshooting Communications Problems
This section explains how to troubleshoot the MJ-5 Communications Module using the front panel LED indicators
and the MJXplorer software. The MJXplorer software allows you to access the communications module parameters
via the MJ-5 Control Panel.
5.6.1 Using MJXplorer to Troubleshoot Communications Problems
The MJXplorer software is a menu-driven application program that allows interfacing to the MJ-5 Communications
Module. Up to three MJ-5 units may be connected at a time. When connecting the Fiber Optic interface to
MJXplorer, the auto repeat function must match the setting in the ConfigureConfigure MJXplorer menu. See
section 4.3.1 for setting the Fiber Optic interface jumpers.
A Fiber Optic to RS-232 driver/receiver is required in order to perform these tests on the fiber optic interface. The
driver/receiver is an optical to electrical signal converter with an ST connector interface and an RS-232 interface.
Connect the optical side to the fiber optic interface via ST fiber optic patch cords. Connect the RS-232 interface to
the personal computer, Figure 7-9.
Use MJXplorer to help pinpoint communications problems in a system. MJXplorer permits testing of the
MJ-5 communications functions independent of other system components.
Once the physical connections are complete, from the MJ-5 front panel select the “2200NOA” protocol for
connecting to only one panel or select “2200” protocol and set comm addresses for connections to multiple panels.
In addition, match the Comm Parity and Comm Baud with the MJXplorer settings. Use MJXplorer to verify that
data can be retrieved from as well as written to the MJ-5 Control Panel.

MJ-5 Communications Module
15
Figure 5-9: MJXplorer Troubleshooting Connections
6 Setting the DNP points
This section describes how to set the DNP points that will be used on the control panel, You can use the DNP
Configure program to customize your DNP point set or you can use one of the predefined point sets listed in section
8.2.
In order to use a customized point set, an MJ-XLmust have version 3.06 and the MJ-X must have 2.52. In order to
use predefined point sets (except Set 7), an MJ-XLmust have version 3.07 and a MJ-X must have 2.53. Set 7 is only
available on the MJ-5 Control.
It is recommended that a Latching Relay command be used for all Binary Outputs (e.g., remote raise/lower, auto
inhibit, etc.).
6.1 Using the DNP Configure program for a custom DNP point set
The DNP Configure program is used to place a custom set of user-defined DNP points on the control panel. You
can obtain this program free-of-charge from your Siemens representative. After installing the program, run it and
follow the steps below to set your DNP points.
1. Connect your computer’s com port to the panel’s Data Port with a “straight-thru” male-female DB9
cable.
2. If you already have a DNP points profile, open it and go to Step 8. To open an existing points profile, in
the menu bar: click File Open and select your file. Otherwise go to Step 3 to create a points profile.
3. Click the Class 0 button. Move between the tabs and checkmark the points you want. Click OK.
4. If Class 1, 2, or 3 polls are desired, these can now be set the same way.
5. Click the Send button. Drag and drop the points up and down in the list boxes to change their point
number if desired. The top point in each box is point # 0, the point below that is point # 1, etc. Click the
Cancel button after points are ordered as desired.
6. In the menu bar: click File Save and save your file as XXXX.dnp
7. Click the Setting button.
8. Match the baud rate and parity between the computer and the panel. Choose the COM port your
computer is using. Set Addressing to be Disabled (if MJ-5’s “DataPortAddr” setting is OFF). Click OK.
9. Click the Send button.

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10. Click the Send button on the bottom of the points list screen.
11. If successful, a window will pop up displaying “Send Communication Status: OK…” Click OK.
12. DNP Configure can be closed or you can use the same point set to configure other panels.
6.2 Selecting a predefined DNP point set
6.2.1 DNP point set for MJ-5
When the MJ-5 Communications Module with firmware version 3.10 (initial release) or higher is interfaced with a
MJ-5, you will be able to choose from a number of DNP point sets, including Set 7. Sets 8 through 15 are not
defined at this time.
6.2.2 DNP Point set for other Control Panels
The operation and functionality of the MJ-5 Communications Module is similar to older versions of the
Communications Module though either the Fiber Optic or the RS-232/485 interfaces may be used at a time. If the
control panel is an MJ-XLwith firmware version 3.07 or higher (or an MJ-X with version 2.53 or higher) and the
Communications Module has firmware 3.07 or higher, you will be able to use predefined DNP point sets. Go to the
<COMMUNICATIONS> menu and scroll to “DNPset.” The complete list of points for each set is listed below.
Two of the most popular point sets are 2.x4 set and 2.x3 set. 2.x4 is backwards compatible with versions 2.04, 2.14,
2.44, etc. Likewise, 2.x3 is backwards compatible with 2.03, 2.13, 2.43, etc. For more information about the
DNP3.0 Level 2 implementation, please contact your Siemens representative.
6.2.3 2.x4
Binary Inputs
Point #
Description
0
Tap Pos Known
1
Power Flow Direction
2
Auto Inhibit Status
3
Remote Control occurring
4
Neutral (U12) Signal
5
VRC1 contacts
6
VRC2 contacts
7
Remote Switch position
8
Manual Switch position
Binary Outputs
Point #
Description
0
Tap Raise
1
Tap Lower
2
Auto Inhibit (Latch On/Off)
Analog Inputs
Point #
Description
0
R/A/M switch position
1
Power Flow Direction Indicator
2
VRC contacts status
3
Tap Position
4
Load Current
5
Load Voltage
6
KW
7
Power Factor
8
KW Fwd Dmd