Perle Systems RIO 5500036-17 - Manual (Page 178)

RIO Remote I/O System User Guide
Installing a Long Distance Module (LDM)
Page 178
Chapter 2 Installing hardware and software
Long Distance Unit main components
The RIO Long Distance Unit (LDU) consists of a converter box with two flying leads. One is a
metre-long RIO Link cable which plugs into your host card or RTA; the other is a serial cable
with a DB25 connector which connects to your modem or RS422 long-wire cable.
Rotary switch
for setting
protocol and
speed.
Data flow LED
flashes green to indicate
incoming data
To Modem, long
wire or X.21
interface.
To host card
or RTA
RIO link flying lead
DB25 Female
flying lead
Dovetail connectors allow
you to join adjacent units
together
Error LED
Flashes red when an
error is detected on the
link
Power LED
Illuminated Green when
LDU is connected to a
host card or RTA