Isolated In-line Serial Converters
Models 4WSD9OTB and 4WSD25OTB convert RS-232 to RS-422 or RS-485 (2 or 4-wire). 2,000V two-way optical isolation protects devices from power surges, spikes and ground loops in harsh electrical environments. These in-line converters support distances up to 1,200 m (4000 ft.) and data rates up to 115.2 kbps. Switchable modes support 2-wire RS-485, 4-wire RS-485, and full duplex RS-422. Available with female DB9 or DB25 RS-232 inputs. Removable terminal blocks for RS-422/485 and external power make wiring easy. Accepts external power from 10-48 VDC from an industrial power source or plug in power supply. The power supply is sold separately
Products specifications
| Attribute name | Attribute value | 
|---|
| Width | 1.69" | 
| Depth | 3.86" | 
| Height | 0.906" | 
| Certification | -40 - 85 °C | 
| RS-232 signals | GND | 
| RS-422 signals | GND | 
| Isolation | 2 kV | 
| Product color | Blue | 
| Baud rate | 115.2 Kbit/s | 
| RS-485 signals | Data+, Data-, GND | 
| Connector 2 | Terminal block | 
| Connector 1 | DB-9 | 
| LED indicators | Yes | 
| Output interface | RS-485 | 
| Host interface | RS-232 | 
| Input voltage | 115.2 Kbit/s | 
| Operating temperature (T-T) | 0 - 70 °C | 
| Storage temperature (T-T) | -40 - 85 °C |