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 Additional links: Manual

Data sheet:

RS232 Isolator in DIN rail mount housing

Article number: 88205

  • RS232 Booster

Serial isolator with signal refreshing

The model 88205 Isolator enables galvanically isolated connection of RS232 devices. It includes its own power source via active RS232 interface, so that operation even on power-weak RS232 ports is possible without any problems.

Properties:Show more


  • 2x RS232
    • 9-pin Sub-D male, DTE pinout
    • 9-pin Sub-D female, DCE pinout
  • Galvanic isolation between the ports
    • Isolation voltage 1kV DC

Management and Connectivity:

  • No re-configuration of transmission parameters required

Power supply:

  • External
    • 12V - 24V AC/DC via pluggable screw terminal connection
    • Galvanically isolated power connection

Standards & more

  • Conforms to standards both in office and industrial environments:
    • High noise resistance for industrial environments
    • Low noise emission for residential and business areas
  • 5 year guarantee
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Worth knowing:Show more

Problem of potential differences:
For longer lines, it is almost impossible to prevent potential shifts between the interfaces of the connected devices. Differences in potential can result from distant lightning bolts but can also be caused during normal operation by switching of high-powered electrical devices in the vicinity. In the event of a potential shift, the data line acts as an equalizing line. Potential differences of as little as 7V can already lead to interference during data transmission. Differences of more than 30V are likely to damage the interface components. The use of electrical isolation for connections over very long distances is therefore a vital measure, which considerably increases the service life of the connected devices.

Technical data:Show more

Connections and displays:

Serial Port A:   RS232 Interface
9-pin SUB-D socket, DCE assignment
Serial Port B:   RS232 Interface
9-pin SUB-D adapter, DTE assignment
Baud rate:   0..115,200 baud
Data format:   any format
Galvanic isolation:   min. 1kV DC between all terminals
Max. distance:   50m
Supported signals:   all RS232 signals
Supply voltage:   12..24V AC/DC (±10%)
Current consumption:   typ. 85mA @12V DC, 45mA @24V DC
Supply connection:   Plug-in screw terminal, 5.08mm spacing
Labeled "L+" and "M"
Displays:   1 LED Power
1 LED Data

Housing and other data:

Housing:   Plastic housing for top hat rail installation
105 x 22 x 75mm (L x W x H)
Weight:   approx. 100g
Ambient temperature:   Storage: -40..+70°C
Operation: 0..+60°C
Permissible relative humidity:   5..95% RH (non-condensing)
Life expectancy:   > 25 years at 25°C ambient temperature
Scope of delivery:   RS232 Isolator
Please order power supplies separately as accessories
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Order now:Show more

  Prod. no. in EUR plus VAT
for commercial users
Unit price *
RS232 isolator, 1 kV, DIN rail housing 88205 128.00 order now
Optional accessories:
Power supplies
Plug-in Power Supply, 24V / 220mA DC with Euro plug 11020 19.00 order now
Plug-in Power Supply, 24V / 750mA DC with Euro, US and UK plug 11026 34.00 order now
Power Supply for DIN rail mount, 24V / 630mA DC
(merchandise, 2-year manufacturer’s guarantee)
11082 34.00 order now
Cable and Connector Accessories
RS232 1:1-Cable, DB9F - DB9M, 2m 11952 9.00 order now
PC/PC RS232 Cable, DB9F - DB9F, 2m 11992 9.00 order now
Mechanical Accessories
IP wall mount housing, 180 x 130 x 175 mm 11120 49.00 order now
Mounting bracket for wall mounting 58812 9.98 order now
19" DIN rail 58813 19.00 order now

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.