Table of Contents
Advertisement
Technical Description
The OMG-USB-SER-4 utilizes four USB UARTs. These chips feature
programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte
Dual Port RX Buffer. The RS-232/422/485 transceiver supports data rates up to
921.6K baud for RS-422/485 and 460.8K baud for RS-232.
Features
•
Hot pluggable device that does not require opening the case
•
No system resources are required (i.e. I/O ports or IRQ's)
•
LED status indicators for USB Enabled and port activity
Connector Pin Assignments
RS-422/485
(DB 9 Male)
Signal
GND
Ground
TX +
Transmit Data Positive
TX-
Transmit Data Negative
RTS+
Request To Send Positive
RTS-
Request To Send Negative
RX+
Receive Data Positive
RX-
Receive Data Negative
CTS+
Clear To Send Positive
CTS-
Clear To Send Negative
RS-232
(DB-9 Male)
Signal
Name
GND
Ground
TX
Transmit Data
RTS
Request To Send
DTR
Data Terminal Ready
RX
Receive Data
CTS
Clear To Send
DSR
Data Set Ready
DCD
Data Carrier Detect
RI
Ring Indicator
OMG-USB-SER-4
Name
Pin #
5
4
3
6
7
1
2
9
8
Pin #
5
3
7
4
2
8
6
1
9
Technical
Mode
Output
Output
Output
Output
Input
Input
Input
Input
Mode
Output
Output
Output
Input
Input
Input
Input
Input
Page 8
Advertisement
Table of Contents
