Impulse 2123 Manuale Utente Scaricare il pdf (Pagina 15)

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’

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Impulse 2123 Manuale Utente Pagina 15