Introduction; Description; Front Panel Led Indicators; L Fiber Optic - Siemens MJ-XL Installation Manual

1 Introduction

This manual describes the installation and connection procedures for the MJ-X
Information is provided for both Fiber Optic and RS232/485 Communications Modules. The operation and
functionality of both versions are quite similar; the mechanical configurations and installation procedures are
different. The manual also covers the procedures for connecting the module to a system of networked MJ-X
Changer Control Panels.

1.1 Description

The Siemens MJ-XL Communications Module is the communication interface used to connect the MJ-X
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 Fiber Optic Communications Module.
Figure 1-2 illustrates the RS-232/485 Communications Module
The fiber optic module enables connection of the tap changer control panel to the supervisory equipment via
multimode fiber optic cable. The RS-232/485 module enables connection of the tap changer control panel to the
supervisory equipment via electrical wire.
The communications modules are installed in MJ-X
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-X
POWER
Watchdog
Communications
POWER
Watchdog
Communications

1.2 Front Panel LED Indicators

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The MJ-X Communications Module has five LED indicators.
• Power indicates the MJ-X
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Communications Modules in MJ-X Control Panels.
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Figure 1-1 MJ-X Fiber Optic Communications Module
RS - 232 / 485
Communications Module
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Figure 1-2 MJ-X RS-232/485 Communications Module
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Communications Module is powered on.
L
Tap Changer Control Panels. This allows you to easily
In Out
G
N
D
Rxd
L
MJ-X Communications Module
L™
Communications Modules.
Fiber Optic
Communications Module
Rxd Txd
R Data R T R
C
T x x T T
N - + d d S S
Txd
L
Tap
L
Control
1