Weidmüller IE-MCT-1RS232/485-1SC Manual

Serial/Fiber Converter
IE-MCT-1RS232/485-1SC
IE-MCT-1RS232/485-1ST
Hardware Installation Guide
Second Edition, April 2016
1398730000/01/04.16
Please note:
This document and any further product information - if
available - can be downloaded at the internet link:
http://www.weidmueller.com/ie
Copyright Notice
Copyright 2016 Weidmüller Interface GmbH & Co. KG
All rights reserved.
Reproduction without permission is prohibited.

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Overview
Introduction
Weidmüller Serial/Fiber converters are equipped with a multiple interface circuit
that can handle RS-232, RS-422, and RS-485 serial interfaces, as well as a
multi-mode fiber. Serial/Fiber converters are used to extend serial transmission
distance up to 5km.The Serial/Fiber converter must be configured to transmit a
particular serial interface. You cannot transmit both RS-232 and RS-485 signals
at the same time.
Why Convert Serial to Fiber?
Fiber communication not only extends the communication distance, but also
provides many advantageous features.
IMMUNITY FROM ELECTRICAL INTERFERENCE: Fiber is not affected by
electromagnetic interference or radio frequency interference. It provides a clean
communication path and is immune to cross-talk.
INSULATION: Optical fiber is an insulator; the glass fiber eliminates the need for
using electric currents as the communication medium.
SECURITY: Fiber cannot be tapped by conventional electric means and is very
difficult to tap into optically.
RELIABILITY & MAINTENANCE: Fiber is immune to adverse temperature and
moisture conditions, does not corrode or lose its signal, and is not affected by
short circuits, power surges, or static electricity.
Reverse Power Protection
The Reverse Power Protection feature provides extra protection against
accidentally connecting the power cables to the wrong terminal. The converter
automatically detects which power wire is positive and which is negative.
Ring Mode
To allow one half-duplex serial device to communicate with multiple half-duplex
devices connected to a fiber ring, you should configure the Serial/Fiber Converter
for “ring mode” by setting DIP switch “SW4” to the “On” position. The Tx port of a
particular Serial/Fiber Converter unit connects to the neighboring converter’s Rx
port on the ring. Note that when one node transmits a signal, the signal travels
around the ring until it returns back to the transmitting unit, which then blocks the
signal. Users should ensure that the total fiber ring length is less than 100 km.

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ATTENTION
For Fiber Ring Users:
To avoid problems when setting up a fiber ring, each Serial/Fiber
Converter unit making up the ring must be powered down and set
to “Ring mode.” Next, make sure all cables are connected properly,
and then power up all devices connected to the ring.
NOTE
“Ring Mode” can only be used with half-duplex applications (i.e.,
RS-485 multi-drop communication).
DIP Switch Selectable Terminator
The Serial/Fiber Converter’s termination resistor is set with a DIP switch located
on the outside of the converter’s casing.
No Configuration Required for Baudrate Settings
The Serial/Fiber Converter is compatible with any baudrate from 50 bps to 921.6
Kbps. The Serial/Fiber Converter automatically converts the signal back and forth
between serial (RS-232, RS-422, or RS-485) and fiber, and does not need to
interpret the signal or the baudrate of the transmitting device.
Features
•“Ring” or “Point to Point” transmission
•Extend RS-232/422/485 transmission distance up to 5km
•Compact size
•Decrease signal interference
•Protect against electronic degradation and chemical corrosion
•Supports baudrates up to 921.6 Kbps
•Extended operating temperature from -40 to 75°C
Package Checklist
Before installing the Serial/Fiber Converter, verify that the package contains the
following items:
•1 IE-MCT-1RS232/485-1SC/ST media converter
•Power jack to 3-pin terminal block adaptor
•Stick-on pads
•Hardware installation guide (printed)
If any of these items are missing or damaged, please contact your Weidmüller
customer service for assistance.
Dimensions and Appearance
Weidmüller Serial/Fiber Converters are easy to set up and use. The serial
terminal block of one of the converters connects to your computer, the serial
terminal block of the other converter connects to your serial device, and the two
converters are connected by fiber cable.
NOTE
Electrostatic Discharge Warning!
To protect the product from damage due to electrostatic discharge,
we recommend wearing a grounding device when handling your
Serial/Fiber Converter.

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IE-MCT-1RS232/485-1ST
IE-MCT-1RS232/485-1SC
Wiring Examples
Connecting the Power Supply
Before using the Serial/Fiber Converter, first connect the DC power supply to the
power supply terminal block located on the Serial/Fiber Converter’s bottom panel.
Connecting RS-422 and 4-wire RS-485 Serial Devices
Connecting 2-wire RS-485 Serial Devices
Connecting an RS-232 Serial Device to a PC

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DIP Switch Settings
Serial Connection
SW1
SW2
RS-232
ON
OFF
RS-422
ON
ON
RS-485 4-wire
OFF
OFF
RS-485 2-wire
OFF
ON
Built-in 120 Ω
Terminator
SW3
SW4
Enable
ON
–
Disable
OFF
–
Ring mode
–
ON
Point to Point mode
–
OFF
The S1 DIP Switch is located inside the Serial/Fiber Converter. When the
Serial/Fiber Converter is in RS-485 mode, use this DIP switch to configure
RS-485 data direction control, data format, and baudrate. When the Serial/Fiber
Converter is in RS-232/422 mode, the S1 DIP switch cannot affect RS-232/422
communication.
RS-485 Data Direction Control Settings
RS-485 Data Direction Control
S1 Pin 1
Auto Baudrate (default setting)
OFF
Fixed Baudrate
ON
NOTE
DIP Switch S1 is only present at models with hardware revision
3.3.0 or later. We recommend users to use Auto Baudrate and
setting S1 Pin 1 to OFF. The default setting is OFF.
Data Format Settings
Data Format
S1 Pin 2
S1 Pin 3
S1 Pin 4
7 Bits
OFF
ON
ON
8 Bits
ON
OFF
ON
9 Bits
OFF
OFF
ON
10 Bits
ON
ON
OFF
11 Bits
OFF
ON
OFF
12 Bits
ON
OFF
OFF
Baudrate Settings
Baudrate
S1 Pin 5
S1 Pin 6
S1 Pin 7
S1 Pin 8
S1 Pin 9
50
OFF
ON
ON
ON
ON
75
ON
OFF
ON
ON
ON
110
OFF
OFF
ON
ON
ON
134.5
ON
ON
OFF
ON
ON
150
OFF
ON
OFF
ON
ON
300
ON
OFF
OFF
ON
ON
600
OFF
OFF
OFF
ON
ON
1200
ON
ON
ON
OFF
ON
1800
OFF
ON
ON
OFF
ON
2400
ON
OFF
ON
OFF
ON
4800
OFF
OFF
ON
OFF
ON
7200
ON
ON
OFF
OFF
ON
9600
OFF
ON
OFF
OFF
ON
19200
ON
OFF
OFF
OFF
ON
38400
OFF
OFF
OFF
OFF
ON
57600
ON
ON
ON
ON
OFF
115200
OFF
ON
ON
ON
OFF
230400
ON
OFF
ON
ON
OFF
460800
OFF
OFF
ON
ON
OFF
921600
ON
ON
OFF
ON
OFF