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Operating instructions
RS232 to RS422/485 Converter
Item no. 1886909
Intended use
The product is designed for connection to a computer with an RS232 interface in order to
provide additional RS422/485 interfaces and a network connection (RJ45). It is compatible with
EIA/TIA RS232C, RS485/RS422 specifications. The converter operates bidirectionally, i.e. it
transmits signals from the computer and from connected devices (upstream and downstream).
Furthermore, it extends the transmission range in accordance with the RS485/RS422 bus
specification. Surge protection prevents damage due to electrostatic discharge (ESD) up to
15 kV. LEDs indicate the operating status. Data in the transmission is protected by a collision
protocol.
The supply voltage is supplied via an external power adapter with 9 V/DC output voltage.
This product is intended for indoor use only. Do not use it outdoors. Contact with moisture (e.g.
in a bathroom) must be avoided under all circumstances.
For safety and approval purposes, do not rebuild and/or modify this product. Using the product
for purposes other than those described above may damage the product. In addition, improper
use can cause hazards such as a short circuit, fire or electric shock. Read the instructions
carefully and store them in a safe place. If you pass the product on to a third party, please hand
over these operating instructions as well.
This product complies with statutory, national and European regulations. All company and
product names are trademarks of their respective owners. All rights reserved.
Delivery content
• Converter
• Serial DB9 M/F cable (1.5 m)
• Power adapter
• Operating instructions
Up-to-date operating instructions
Download the up-to-date operating instructions at www.conrad.com/downloads or scan the QR
code shown. Follow the instructions on the website.
Explanation of symbols
The lightning symbol inside a triangle is used when there is a potential risk of
personal injury, such as electric shock.
The symbol with an exclamation mark in a triangle is used to highlight important
information in these operating instructions. Always read this information carefully.
The arrow symbol indicates special information and tips on how to use the product.
This symbol indicates that this product is built according to protection class II. It is
equipped with reinforced or dual insulation between the mains circuit and the output
voltage.
The product must only be installed and used in dry, indoor locations. It must not
become damp or wet, as this may cause a fatal electric shock!
Safety information
Read the operating instructions and safety information carefully. If you do
not follow the safety information and information on proper handling in these
operating instructions, we will assume no liability for any resulting personal
injury or damage to property. Such cases will invalidate the warranty/
guarantee.
a) General information
• The product is not a toy. Keep out of the reach of children and pets.
• Do not leave packaging material lying around carelessly. It may become a
dangerous plaything for children.
• Protect the product from extreme temperatures, direct sunlight, strong jolts, high
humidity, moisture, flammable gases, vapours and solvents.
• Do not place the product under any mechanical stress.
• If it is no longer possible to operate the product safely, take it out of operation and
protect it from any accidental use. Safe operation can no longer be guaranteed
if the product:
- is visibly damaged,
- is no longer working properly,
- has been stored for extended periods in poor ambient conditions or
- has been subjected to any serious transport-related stresses.
• Please handle the product carefully. Jolts, impacts or a fall even from a low height
may damage the product.
• Always observe the safety information and operating instructions of any other
devices which are connected to the product.
• Consult a technician if you are not sure how to use or connect the product, or if
you have concerns about safety.
• Maintenance, modifications and repairs must only be carried out by a technician
or a specialist repair centre.
• If you have any questions that are not answered in these operating instructions,
please contact our technical customer service or other professionals.
b) Electrical safety
• Before connecting the product to the mains, check that your local A/C mains
voltage matches the specifications on the nameplate.
• The power adapter is built according to protection class II. Only connect the
adapter plug to a standard mains socket (230 V/AC, 50 Hz) connected to the
public grid.
• Never pour liquids over electrical devices or place objects filled with liquid next to
the device. If liquid or an object gets into the device, power down the respective
mains socket (e.g. switch off the circuit breaker), and then pull the mains plug
from the mains socket. Discontinue use and take the product to a specialist repair
centre.
• Never use the product immediately after it has been brought from a cold room into
a warm one. The condensation that forms might destroy the device. The mains
adapter may also cause a fatal electric shock! Allow the product to reach room
temperature before connecting it and putting it to use. This may take several
hours.
• Do not touch the mains adapter if there are any signs of damage, as this may
cause a fatal electric shock! Switch off the mains voltage to the socket containing
the power adapter (switch off at the corresponding circuit breaker or remove the
safety fuse, and then switch off at the corresponding RCD protective switch).
You can then unplug the mains adapter from the mains socket. Dispose of the
faulty mains adapter in an environmentally friendly manner and discontinue use.
Replace it with a power adapter of the same design.
• The mains outlet must be located near to the device and be easily accessible.
• Never connect or disconnect power adapters if your hands are wet.
• Never unplug the mains adapter from the mains socket by pulling on the cable;
always use the grips on the plug.
• When setting up the product, ensure that the cables are not pinched, kinked or
damaged by sharp edges.
• Always lay the cables so that nobody can trip over or become entangled in them.
This poses a risk of injury.
• For safety reasons, disconnect the power adapter from the mains socket during
storms.
• Never leave the product unattended during use.
• The housing warms up during use. Ensure that there is sufficient ventilation. Do
not cover the housing!
• Only power the product using the mains adapter provided.
• When using the power adapter, ensure that the total current consumption of all the
connected devices does not exceed 2 A.
Operating elements
6
5
4
3
2
1
1 RJ45 network port
7
2 Screw holes for mounting
3 RXD LED (green)
4 TXD LED (yellow)
5 PWD power LED (red)
6 RS232 input
7 DC9V mains connection
8 RS485/RS42 output and adapter
8
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