Impulse PC_104 RS‑422, RS‑485 Serial Interface (3550) - Manual

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PC/104 ‑ Asynchronous Serial
Item #
The 3550 PC/104 serial interface provides one serial port
configurable 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
Configurable 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)
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Technical Specifications
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.
PC/104 RS‑422, RS‑485 Serial Interface
3550