Rockwell-automation 1770-KF2 Data Highway or Highway Plus Interface Mo Uživatelský manuál stáhnout pdf (Strana 37)

Installation

Chapter 3

3-13

This type of connection includes the DTR signal to allow each end to

detect the loss of the other end’s ability to communicate. If your

computer does not provide the DTR signal, jump Pins 6 and 8 at the KF2

module to Pin 20.

Connection to a Modem

To connect the module to a modem, you can construct your own cable

according to the wiring diagram in Figure 3.7. This cable plugs into the

COMPUTER ASYNCHRONOUS connector on the module and the

RS-232-C compatible connector on the modem (Figure 3.7). Connect the

cable shield at one end only. Be sure that the cable length does not exceed

the RS-232-C limit of 50 feet.

Figure 3.7

Connection

to a Modem

25-Pin Female Connector 25-Pin Male Connector

Cable

Asynchronous

PORT

Connector

of 1770-KF2

Module (RS-232-C)

A. Connection Diagram

RS-232-C

Compatible Port

Connector of

Modem

Asynchronous

Port Connector

of 1770-KF2 Module

(RS-232-C)

25-Pin Female

Cable (Not

Connector

25-Pin Male

Exceeding 50 Feet)

Signal Ground

TXD

RXD

RTS

CTS

DSR

Chassis Ground

B. W

iring Diagram

RS-232-C

Compatible Port

Connector of

Modem

DCD

DTR

14831

Connector

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 234 235

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