Active Communication

Overvoltage protection for RS485 ports:
The maximum permissible differential voltage which is permitted to reach RS485 transceivers from the outside is limited to approx. ± 12...14V according to data sheet specifications of the chip manufacturer. Voltages which exceed these values will inevitably result in damage to or even destruction of the chips.

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.

Operating modes:		RS422 RS485 2/4 wire with handshake control RS485 2/4 wire with automatic control
Switching time:		approx. 10µs for switching from data send to receive for RS485 automatic control (can be changed on request)
Baud rate:		0..115,200 baud
Data format:		any format
Signal lines:		RxD A/B, TxD A/B, CTS A/B, DTR A/B
Termination:		Connectable termination network for RS485 operation
RS232 adapter:		9-pin SUB-D adapter, PC assignment
RS422 adapter:		9-pin SUB-D adapter
Galvanic isolation:		Isolation voltage min. 1 KV DC between all terminals
Supply voltage:		12..24V DC/AC
Current consumption:		No-load: typ. 100 mA @12V DC, 50mA @24V DC Operating: typ. 150 mA @12V DC, 75mA @24V DC
Supply voltage connection:		Plug-in screw terminal, 5.08mm spacing Labeled "L+" and "M"
Ambient temperature:		Storage: -40..+70°C, Operation: 0..+60°C
Permissible relative humidity:		0..95% RH (non-condensing)
Housing:		Plastic compact housing, 105x75x22mm
Weight:		approx. 100 g
Delivery:		1 x RS232 RS422/RS485 interface, Industry

Product properties:

RS485 2 and 4 wire compatible RS485 automatic mode No re-configuration of transmission parameters required Min. 1 kV electrical isolation Extended supply voltage range up to 24V Shipped optionally with or without power supply: Please order power supplies as separate accessories. Top hat rail housing according to DIN EN 50022-35 Suitable as "non-intelligent" converter for RS485 field buses RS232 Conforms to standards both in office and industrial environments: Increased noise immunity for industrial areas Stricter noise emission for residential and commercial areas