Black Box ICD102A

DIN Rail Repeaters with Opto-Isolation, RS-422/RS-485 Act as repeaters, isolators, and extenders.
The RS-422/RS-485 model isolates RS-422/485 equipment, features selectable rates between 2400 bps and 115.2 kbps, and enables a system to exceed 32-node limitations.
The RS-232 model isolates the TD, RD, RTS, and CTS channels, supports 115.2-kbps speeds on all four channels, and extends the RS-232 signal beyond 50 feet (15.2 m).