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Electrical specifications, Onnector, Inouts – Impulse 2123 User Manual

Page 15

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Electrical Specifications

The 2123 connects to a single USB port and provides a single RS-232/422/485
software configurable serial port. The 2123 utilizes high speed USB/UARTs with
128-byte Tx FIFOs and 384-byte Rx FIFOs. The chips feature programmable baud
rates and data rates to 921.6K bps.

Connector Pinouts

RS-232 (DB9 Male)

Pin #

Signal

1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI

RS-422 & RS-485 Four-Wire (DB9 Male)

Pin #

Signal

1 RX+
2 RX-
3 TX-
4 TX+
5 GND

Note: Pins 6-9 are ‘no connect’


RS-485 Two-Wire (DB9 Male)

Pin #

Signal

3 DATA-
4 DATA+
5 GND

Note: Pins 1, 2, 6-9 are ‘no connect’

© Sealevel Systems, Inc.

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