Installation

50 - Connecting Serial Devices Hardware Installation and Configuration Guide: 2000451 Rev. J

Connecting Serial Devices

Serial Terminal (8)

Null-Modem Cables

(RS-232)

An RS-232 null-modem

cable is required for

connecting DTE devices.

RS-232 CD DSR RI DTR TxD RTS RxD CTS

RS-422/RS-485

Full-Duplex

N/A N/A N/A N/A TxD- TxD+ RxD- RxD+

RS-485 Half-

Duplex

N/A N/A N/A N/A TRxD- TRxD+ N/A N/A

† RS-232 ground must be connected to the appropriate signal ground

terminal.

† Wire gauge: AWG 12-22

Signal

Ground

Not connected

Positive†

Return†

5-30VDC

Signal

Ground†

Chassis

Ground†

RS-232: Connecting the Ground

RS-232 Null-Modem Cable

CD DSR RI DTR RTSTxD RxD CTS

DCD DTR RI DSR CTSRxD TxD RTS

1496 837

820226 5324

DB9

DB25