Product specifications
WuT 86203
Serial Interface, RS232 <> RS422/485 with overvoltage protection
The Interface connects devices equipped with an RS232 interface to RS422 or RS485 components. The built-in galvanic isolation ensures uninterrupted transmission in industrial environments.
Product properties:
Bi-directional conversion of an RS232 into an RS422 or RS485 interface
Compatible with RS485 2-wire and 4-wire bus systems
Automatic bus access control
No re-configuration of transmission parameters required
Galvanic isolation min. 1kV DC
Integrated overvoltage protection
Supply voltage 12..24V AC/DC
Careful circuit design and generous component dimensioning
ensure more than 25 years of service life
Conforms to standards both in office and industrial environments:
Increased noise immunity for industrial areas
Stricter noise emission for residential and commercial areas
Related products:
Interface RS232 <> RS422/RS485, standard version without overvoltage protection, model 86201
Overvoltage protection for RS485 ports:
The maximum permissible differential voltage that can affect RS485 transceiver components from the outside is generally limited to values of around ± 12..14V. Voltages that exceed these values will always result in damage to or even destruction of the interface components.
Shielded cables which run completely within a building should not generally see such high differential voltages, since coupling onto the transmission line is manifested as common mode interference: The potential of all cable leads is increased equally. In such applications the standard Interface Model 86201 can be used without any problems, since its galvanic isolation ensures that equal potential increases do not cause any damage.
When using the interface converter on transmission lines that run outside of buildings or when the cabling conditions are unclear, use of the 86203 Interface is advisable. This interface type features integrated overvoltage protection which limits the maximum occurring differential voltages to +/- 9V using fast protection diodes.
Features :
Connections and displays:
- Serial Port A: RS232 Interface, 9-pin SUB-D adapter, PC assignment
- Serial Port B: RS422 Interface, 9-pin SUB-D adapter
- Baud rate: 0 to 115.200 kBaud
- Data format: any format
- Galvanic isolation: min. 1kV DC between all terminals
- Overvoltage protection: Transil diodes for limiting the differential voltage
- Supply voltage: 12..24V AC/DC (±10%)
- Current consumption: typ. 80mA @12V DC, 40mA @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)
- MTBF: 656,551h @25°C per MIL-HDBK-217
- Life expectancy: > 25 years at 25°C ambient temperature
- Scope of delivery: Interface RS232 <> RS422/RS485 Industry with OVP
**Please order power supplies separately as accessories**
- Wiesemann & Theis product -
