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Chapter 1 – Introduction
The 232BSS4 provides communications to four devices from one serial
port. Each port uses a dedicated UART and includes an 8K byte transmit
buffer and an 8K byte receive buffer (16K bytes total). Each port can be
independently configured for data rate, data format, and protocol. The
Master port can send and receive data from one of the Slave ports while the
other Slave ports continue to buffer data. The Master device can also
broadcast the same message to two or more Slave ports at once.
The 232BSS4 can be configured to send data automatically to the Master
port from each of the Slave ports when data is present with an optional
preamble identifying the port. It can also provide two-way communications
between the Master port and one Slave port at a time. Switching and control
is done through user-defined three or four character command strings. All
control sequences are removed from the data stream, making the switch
transparent to the Slave devices. The PC setup software provided walks the
user through all possible parameters.
Switches can be cascaded to expand the 232BSS4 to more than four ports.
Two units can also be used back-to-back to provide automatic connection
between devices over a single data channel. LEDs on the 232BSS4 indicate
when the unit is powered up and which port is selected to send data to the
Master port.
Documentation Number 232BSS4-2916m
1
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