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O P E R A T I N G I N S T R U C T I O N S
Interface RS232-RS422/485-
Converter
Item-No. 98 12 90
Intended use
The product is intended for converting an RS232-interface into a RS422/485-standard or vice versa.
The power is supplied either via the RS232-interface or via a supplied external adapter.
This product complies with the applicable National and European specifications. All names of compa-
nies and products are the trademarks of the respective owner. All rights reserved.
Contents
• Converter
• Operating Instructions
Safety Instructions
The warranty will be void in the event of damage caused by failure to observe these
safety instructions! We do not assume any liability for any consequential damage!
We do not assume any liability for material and personal damage caused by improper
use or non-compliance with the safety instructions. The warranty will be void in such
cases!
• The unauthorised conversion and/or modification of the product is inadmissible because of
safety and approval reasons (CE).
• The design of the mains transformer complies with protection class II. As a voltage source,
only a proper power socket (230V~, 50Hz) connected to the public power supply system may
be used.
• This product is not a toy, and should be kept out of the reach of children. Children cannot
assess the dangers arising from incorrect use of electrical devices. Be especially careful if
children are around.
• Only use in dry indoor locations. The product must be protected from damp and wet, as there
is a risk of a fatal electric shock! Never touch the product with wet hands.
• Do not expose the product to extreme temperatures (< 0°C or > +40°C), direct bright sun-
light, strong vibrations, high humidity or strong mechanical stress.
• Never use the product immediately after it has been brought from a cold room into a warm
one. Condensation that forms might destroy the device. Furthermore, there is a danger of an
electric shock.
•
Wait until the product is at room temperature and the condensation has evaporated. This may
take several hours.
•
Then plug the power supply into an mains socket and put the product into operation.
• Do not leave packing materials unattended. They may become dangerous playthings for chil-
dren!
• Handle the product with care, it can be damaged by impacts, blows, or accidental drops, even
from a low height.
• Warning: This is a class A device. This device may cause interference if used in the home.
In this case, the operator may be requested to take appropriate measures.
Terminal assignment for the 25- pole SubD-connector
Pin 2
TD
Pin 3
RD
Pin 4
RTS
Pin 5
CTS
Pin 6
DSR
Pin 20
DTR
Pin 7
GND
Terminal assignment for the 4-pole terminal strip
Terminal
Simulation mode
1
T+
2
T-
3
R+
4
R-
Configuration, Connection
Depending on the available, or the desired, cable connection, the slide switches on the converter need
to be set accordingly, and the connections must be made via the 4-pole terminal strip.
Then connect the power supply with the mains socket and the converter (the power-LED, at the right
next to the slide switches, flashes), connect it to the RS232-interface.
When the RS232-interface provides the power supply (usually via Pin 9 of the 25-pole
connector), a power transformer is not always necessary. In this case, the power-LED (at
the right next to the slide switches) does not flash.
www.conrad.com
Version 02/09
Monitoring
R1+
R1-
R2+
R2-
Mode DTE
Mode DCE
Simulation mode
°
Monitoring mode
Loop-Back-test for DTE and DCE:
Peer-to-peer connection, 4 cables, full-duplex:
Peer-to-peer connection, 2 cables, simplex:
Peer-to-peer connection, 2 cables, half-duplex:
Monitoring:
Multi-drop, 4 cables, full-duplex:
Multi-drop, 2 cables, simplex:
Disposal
Electrical and electronic devices must not be disposed of in the domestic waste! Please
dispose of the device when it is no longer of use, according to the current statutory
requirements.
© Copyright 2009 by Conrad Electronic SE.
The transmitter is switched on, when RTS is active. The receiver is always
switched on.
The transmitter and receiver are always switched on.
The transmitter is switched on, when RTS is active. The receiver is switched on,
when RTS is not active.
Termination required
Termination required
These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240
Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or
the capture in electronic data processing systems require the prior written approval by the editor.
Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in
technology and equipment reserved.
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