UOTEK
UOTEK UT-218 RS232 to RS485 RS422 Data Converter
Converts RS-232 to RS-485 or RS-422 with 2.5KV isolation, ±15KV ESD protection, automatic direction control and 5,000m range at 9,600bps
- TypeConverter
- Connector ADB9 Female
- Connector BDB9 Male,RJ45
- Converts RS-232 to RS-485 or RS-422 with 2.5KV isolation
- Automatic data direction control removes need for RTS flow control signal
- Connects up to 128 RS-485 or RS-422 devices on one bus
- Transmits up to 5000 metres at 9600 bps over twisted-pair cable
- Operates from -40 to 85 °C with ±15KV ESD and surge protection
Industrial serial converter
The UOTEK UT-218 converts RS-232 signals to RS-485 or RS-422 differential outputs using a DB9 female input and DB9 male or RJ45 output. It targets engineers integrating legacy serial equipment into industrial networks that require balanced differential signalling. The unit operates without external flow control signals and supports asynchronous half-duplex or full-duplex modes without jumper changes.
Interface limits
The converter handles baud rates from 300bps to 115.2Kbps and supports up to 128 RS-485 or RS-422 devices on a single bus. Maximum transmission distance reaches 5,000m at 9,600bps over twisted-pair or shielded cable. Automatic data direction control removes the need for RTS management, while 2.5KV rms isolation and ±15KV ESD protection guard each line against surges.
Build and connectivity
The compact enclosure measures 97×65×22mm and operates from -40 to 85 Celsius in 5% to 95% relative humidity. A built-in DC/DC module provides enhanced isolation, and LED indicators show power, data flow and failure status. DB9 and RJ45 connectors allow direct cabling to industrial terminals or patch panels, and the plug-and-play design works with all communication software across every supported operating system.
Highlights
- Converts RS-232 to RS-485 or RS-422 with 2.5KV isolation
- Automatic data direction control removes need for RTS flow control signal
- Connects up to 128 RS-485 or RS-422 devices on one bus
- Transmits up to 5000 metres at 9600 bps over twisted-pair cable
- Operates from -40 to 85 °C with ±15KV ESD and surge protection
Specifications
| Brand | UOTEK |
|---|---|
| Model | UT-218 |
| Type | Converter |
| Connector A | DB9 Female |
| Connector B | DB9 Male,RJ45 |
Questions about this item
Should I choose the DB9 male or the RJ45 connector on the RS-485/422 side?
Both connectors carry the same converted signal; use the DB9 male for panel-mounted equipment or the RJ45 for twisted-pair cabling runs up to 5,000m at 9,600bps.
What does the 115.2Kbps maximum baud rate mean for my application?
It is the peak asynchronous rate the converter can sustain; at that speed the reliable distance drops well below the 5,000m quoted for 9,600bps.
How does the RS-485 half-duplex and RS-422 full-duplex switching work without jumpers?
The UT-218 automatically detects the data direction on the RS-232 TXD line, so no RTS signal or hardware jumper is needed to change modes.
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