The 485TBLED converts unbalanced full-duplex RS-232 signals to balanced full or half-duplex RS-422 or RS-485 signals. RS-485 is an enhanced version of the RS-422 Standard. It allows multiple drivers and receivers on a two-wire or four-wire system.

The RS-232 port configured as a DCE port has a female DB25 connector with pins 2 (TD input) 3 (RD output) and 7 (Signal Ground) supported. Pins 4 (RTS) and 5 (CTS) are tied together and pins 6 (DSR) 8 (CD) and 20 (DTR) are also tied together. Pins 1 (Frame Ground) and 7 (Signal Ground) are connected straight through to the RS-485 terminal blocks. The RS-485 terminal blocks support Transmit Data (A-) and (B+) Receive Data (A-) and (B+) Frame Ground Signal Ground and +12 VDC input. See Schematic.

• CE
• FCC Class B
• EN 55022
• EN 61000-6-1
• EN 61000 (-4-2 -4-3 -4-4 -4-5 -4-6 -4-8 -4-11)