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Automatic converter RS232-RS485 with galvanic insulation COMM485 |
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Written by emmeci
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Friday, 27 April 2007 22:57 |
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The COMM485 interface, performs the conversion between a serial port RS232 and an RS485 line.
Its simplicity of use means that it can be used also if it is necessary to establish a serial connection between 2 devices with RS232 port, but arranged at a distance such to prevent the use of the standard serial port.
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Compared to other converters RS232 / RS485 the COMM485 interface offers some important advantages:
- The RS232 / RS485 conversion is performed completely automatically, so that the COMM485 interface can also be used with software designed for serial ports RS232, and therefore without the direction signal requested by the RS485 line.
- The COMM485 interface guarantees galvanic insulation between RS232 and RS485, avoiding propagation of disturbance from one line to another. This is very important when a PC is used to control, for example, processing lines installed in industrial workplaces; in fact, without any galvanic isolation, any disturbance detected by the RS485 line could reach the PC, altering its operation or damaging it.
TECHNICAL DATA
| DIMENSIONS (lenght x width x height) |
138 x 77 x 72 mm |
| FIXTURE |
DIN guide |
| CONNECTIONS |
Screw-on terminals ø max.1,5mm |
POWER SUPPLY
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220Vac 3W max. |
INPUT SERIAL PORT
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RS232 with 3 wires with female 9-pin connector |
OUTPUT SERIAL PORT
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RS485 with 2 wires + earth with excludable line terminators |
| BAUD RATES MANAGED |
1200, 2400, 4800, 9600, 19200, 38400 |
SIZE OF SERIAL DATA MANAGED
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Any protocol using 7 or 8 bits, with or without parity, with 1 or 2 stop bits. |
INSULATION BETWEEN SERIAL LINES AND MAINS POWER SUPPLY
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>3KV |
| LINE INSULATION RS232<>RS485 |
>600V |
| LINE RS485 INPUT IMPEDENCE WITH TERMINATOR DISABLED |
>10Kohm |
| LINE RS485 INPUT IMPEDENCE WITH TERMINATOR ENABLED |
220ohm |
| MINIMUM DIFFERENTIAL SIGNAL ON LINE RS485 |
0,2V
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Last Updated on Tuesday, 27 July 2010 12:24 |
