RTS XCP-48-RJ45 Spezifikationen PDF herunterladen (Seite 19)

Chapter 5 EIA-232: DB-9 19

DB-9 4-Wire Hardware Handshaking (DTR) Cable

The following four-wire cable is often sufficient for a terminal, printer, or

other DTE device configured for DTR (hardware) flow control. However,

some terminals and printers may have other cable requirements. Consult

your terminal or printer manual for this information. For more universal

compatibility, use a fully-wired DB-9 terminal/printer cable .

Terminal/Printer Cable with DTR Handshaking

Digi DB-9 Connector Pin Assignments

DB-9 Modem Cable

To connect a DB-9 equipped asynchronous adapter to a modem, use a

standard "straight-through" cable. A straight-through cable has a DB-9

female connector at the Digi end, and a DB-9 male connector at the

modem end. All 9 pins are connected, 1 to 1, 2 to 2, 3 to 3, etc. Use

shielded cable, and connect pin 1 of each connector to the cable shield.

Fully-Wired DB-9 Terminal/Printer Cable

The following cable wiring supports most serial terminals or printers with

either software or hardware handshaking. This cable is valid with any Digi

DB-9 serial port.

Most terminals and printers use Request to Send/Clear to Send (RTS/CTS)

for hardware handshaking. The following cable wiring supports this

method.

DB-9 Female

(Digi End)

DB-9 Male

(Peripheral)

Signal Pin Pin Signal

RxD 2 connected to 3 TxD

TxD 3 connected to 2 RxD

SG 5 connected to 5 SG

CTS 8 connected to 4 DTR

GND Shell connected (via shield) to Shell GND

jumpered 7+8 RTS+CTS

Signal Description DTE Use Pin #

GND Chassis Ground N/A Shell

DCD Data Carrier Detect Input 1

RxD Received Data Input 2

TxD Transmitted Data Output 3

DTR Data Terminal Ready Output 4

SG Signal Ground reference 5

DSR Data Set Ready Input 6

RTS Request to Send Output 7

CTS Clear to Send Input 8

RI Ring Indicator Input 9

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 151 152

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