The Patton Model 2018 is an optically isolated, multi-function RS-232 to 20mA current loop converter: Hook it up to an active 20mA current loop circuit and it's a passive converter. Hook it up to a passive 20mA current loop circuit, add DC power to one of several DB-25 interface pins, and it's an active converter. Connect two units together, supply DC power to one interface, and it’s an optically isolated RS-232 distance extender.

The Model 2018 supports data rates to 19.2 Kbps, and current loop distances to 4 miles (6.4Km) over two twisted pair. The Model 2018 connects directly to either the RS-232 interface or the 20mA current loop interface using a male or female DB-25 connector. An external DCE/DTE switch eliminates the need for RS-232 crossover cables.

 

Interfaces: Asynchronous
Transmit Line: 19 - 26 AWG (.9mm - .4mm)
Range: 4 miles (6.4Km) on 24 AWG twisted pair
Interfaces: EIA RS-232, CCITT V.24 (.5 mm) full duplex, 20mA current loop
Data Rate: 50 - 19.2 Kbps
Isolation: 2500V RMS via opto-isolators on line side
Connectors: Male or female DB-25 on both sides
Temperature Range: 0-50°C (32-122°F)
Altitude: 0-15,000 feet (4.5Km)
Humidity: Up to 95% non-condensing
Power Supply: None required; uses power from NIC data signals
Dimensions: 2.21" L x 0.8" H x 2.10" W (5.6 x 2.0 x 5.3 cm)
Weight: 1.7 oz.