Impulse PC-104, RS‑422, RS‑485 User Manual

®

PC/104 ‑ Asynchronous Serial

PC/104 RS‑422, RS‑485 Serial Interface

3550

Item #

The 3550 PC/104 serial interface provides one serial port

congurable for RS‑422 or RS‑485. The board is capable
of data rates to 460.8K bps and automatically handles

RS‑485 transmitter enable/disable. The 3550 utilizes

a 16C850 UART to provide 128‑byte Tx/Rx FIFOs for
maximum reliability in data intensive applications. Ordering

options allow the choice of UARTs for custom baud rates

and 9‑bit protocols. Sealevel’s SeaCOM software utilities
make installation and operation easy.

Unique Features

Congurable for RS‑422 or RS‑485



16C850 buffered UART with 128‑byte FIFOs



Data rates to 460.8K bps



Automatic RS‑485 enable/disable



10‑pin vertical header connector (right‑angle connector



available for OEM opportunities)

Technical Specications

Number of ports 1
Communications chip 16C850 UART

Max data distance Up to 4000 ft. @ 9600 bps

Max data rate 460.8K bps
RS‑485 operation Two or four wire
Operating temperature 0 ‑ +70° C
Storage temperature ‑50 ‑ +105° C

Humidity range 10 ‑ 90% R.H.

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