Impulse 7205e - Manual (Page 3)

Introduction
The Sealevel COMM+2.LPCIe (Item# 7205e) provides a PCI Express 1.0a
compliant interface adapter with two asynchronous serial ports for industrial
automation and control applications. The serial ports are field selectable for RS-232,
RS-422, or RS-485 and support data rates to 921.6K bps.
Configure both ports as RS­232 for standard serial COM: port requirements. Choose
the RS-422 mode for long distance device connections up to 4000ft. where noise
immunity and high data integrity are essential. Select RS-485 and capture data from
multiple peripherals in an RS­485 multi-drop network. Up to 31 RS-485 devices can
be connected to each port to automate your data collection. You can even mix the
ports in any of the interface combinations to provide maximum flexibility to your
application.
In RS-485 mode, the transmitter is automatically enabled in hardware, eliminating
the need for application software control. This allows the 7205e to be used with
standard serial communications applications and removes the risk of bus contention
and data corruption. In RS-232 mode, all modem control signals are implemented
for maximum compatibility with a wide range of serial peripherals. The Sealevel
SeaCOM software driver and utilities make installation and operation easy using
Windows 98, ME, 2000, NT, XP, Vista and Linux operating systems.
The 7205e ships with a low profile PC bracket for use in systems with a low profile
PCI Express slot. If you need a standard size PC bracket, order the 7205eS.
Features
PCI Express two-port serial interface adapter
Each port configurable for RS-232, RS-422, or RS-485
High performance 16C950 UART with 128-byte FIFOs
Each port supports data rates to 921.6K bps
Oscillator and clock prescaler support wide range of baud rates
Supports 9-bit protocol framing
PCI Express 1.0a compliant via X1 connector
Compatible with all low profile and standard size PCI Express slots
All modem control signals implemented in RS-232 mode
Includes 36” cable that terminates to two DB9M connectors
© Sealevel Systems, Inc. - 1 - COMM+2.LPCIe User Manual