Remote I/O System User Guide

RIO Remote I/O System User Guide

Installing a Long Distance Module (LDM)

Page 184

Chapter 2 Installing hardware and software

LDM Cabling information

This section contains cabling information for installing Long Distance Modules.

LDU flying lead connector pinouts

Cable diagram

Mini DIN on RIO link flying lead

Note

For modem installations, a converter cable must be used to connect the LDU DB25 flying

lead to the modem. See Asynchronous/Synchronous Modem & X21bis (DB25

female to DB25 male) on page 187.

On long-wire installations, you can connect the long wire directly to the DB25 flying lead.

See Asynchronous Long-wire Connection (DB25 male to DB25 male) on

page 186.

For X.21 Synchronous connections, you need to use a converter cable to connect the DB25

flying lead to the X21 interface. See Synchronous X.21 connection on page 188.

PIn Signal Description PIn Signal Description

1 GND Ground 5 RXD+ Receive Data

2 VCC Supply Voltage 6 TXD+ Transmit Data

3 RXD- Inverse RXD

4 TXD- Inverse TXD

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