C1-25
RS232-RS422/RS485 converter (9-36 Vdc, DIN rail)
C1 Line (serial converters and repeaters)
This line includes a series of high quality industrial devices that are used in setting up networks based on standards RS232, RS422 and RS485; various models are available: with DC (9-36 Vdc) or AC (90-270 Vac) power, for DIN rail mounting or in a desk version; they can be used as universal converters (from RS232 to RS422 or RS485), dual converters (from RS232 to RS485 with two branches) or signal rigenerators (RS422 or RS485). All models can operate with baud rate from 1.2 to 115 kbit/s and automatically sense the direction of the data flow; the triple optical isolation (both line interfaces and power section) and the possibility to set bias and terminating resistances guarantees the safety of data transmission even if affected by strong interference and noise.
The C1-25 is a DIN rail mounting device suitable for converting RS232 line signals to RS422 or RS485 standard. Microswitches, with direct access, allow the user to set: operation mode (automatic or manual), line interface (RS422 or RS485), baud rate (from 1.2 to 115 kbit/s) and bias and terminator resistors. A tipical application consists as converter interface device in SCADA interfacing with modbus peripheral devices. A triple optical isolation galvanically isolates the power section and the two line interfaces.
| Power supply: | • From 9 to 36 Vdc, 60 mA @ 24 Vdc |
| Power supply protections: | • Against polarity inversion |
| Operating environment: | • Temperature: from 0 to +70°C. Relative humidity: from 25 to 85% (non condensing) |
| Operating atmosphere: | • Without corrosive gas |
| Storage temperature: | • From -20 to +80°C (without ice) |
| Electromagnetic compatibility: |
• Radio frequency emissions: EN55011 Group 1 Class A • Conducted emissions: EN55011 Group 1 Class A • Radio frequency immunity: ENV50140 10V/m AM from 80 to 1000MHz • Conducted immunity: ENV50141 10V/m AM from 0,15 to 80MHz |
| IP grade: | • Connectors: IP20, Enclosure: IP20 |
| Communication speed: | • 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 baud |
| 485/422 Lines protection: | • Against surge, short circuits, voltage peaks |
| Insulation: |
• Between 232 and 422/485 sections: 1000V • Between power supply and 485/422 sections: 500V • Betweeen power supply and 232 section: 1500V |
| Propagation delay: | • Less that 1µs |
| 485 Line release delay: | • Two characters after the last bit transmitted |
| Bit distortion: | • |
| Pull-up and pull-down restistors: | • 680 ohm individualy selectable |
| Terminating resistors: | • 120 ohm individualy selectable |
| Connection type: | • RS232 sub-D 9 female, RS422/48 screw type for maximum AWG 12 wire |
| Signaling LEDs | • Power on, Tx, Rx, Line busy |
| Mounting: | • DIN EN50022 rail |
| Dimensions: | • 80mm (W) x 80mm (H) x 50mm (D) |
| Weight: | • 150g |
| Ordering code: | • C1-25 |


