EC Data ECD232fos User Manual

ECD232fos User Manual
RS232 to Fiber Optic Converter (Single Mode)
1. Introduction
1.1 Block Diagram
B lock Dia g ra m
screw term ina ls
L E D
T xd2
Is ola ted
R xd2
S upply
Gnd2
T xd
R xd
LE D
Gnd
DTR
DS R Note: the R S - 232 s ig na ls
a re a va i la ble a t either the
R T S
9- pin or top s crew term ina ls .
C TS
9-pin F emale DCE
1.2 Product Overview
The ECD232fos is designed specifically for use
in industrial panel applications. It provides the
following unique combination of features:
Fiber optics provides an intrinsically
100% galvanically isolated, noise-free, lightning
immune data communication signal. The
ECD232fos uses high quality components to
communicate up to 11Km at 1310nm over
9/125um fibers. ST or SMA connectors are
available.
The ECD232fos has two RS-232 ports:
a 9-pin d-shell and 3 compression screw
terminals. These are actually independent ports
and you can connect a second device to the
second port. It has 2 main uses:
1) You can connect a notebook computer to the
second port to monitor the communications
or introduce "noise" to test your error
recovery, and
2) During factory or lab testing, you can run 3-
wire RS-232 cables between your
ECD232fos units instead of making a lot of
short-use fiber test cables.
Optionally, the RS-232 port of the
ECD232fos can have 2500V optical/galvanic
ECD232fos User Manual
screw term ina ls
V+
Ma in
V- -
S upply
R X
LE D
TX
www.ecdata-tech.com
isolation from the power supply.(the two RS232
port always share the same ground)
With a floating ground, RS232 cable
runs up to 50m can be guaranteed with quality,
low capacitance cable like Beldon 1422A at
42pF/m. (RS232 requires less than 2500pF per
signal)
For rapid troubleshooting and to
simplify installation, you can treat the Rxd screw
terminal as a test signal. Connecting a +5 to
15Vdc signal to it will force the fiber optic
transmitter on. Visible even with the naked eye,
this allows very quick checking of fiber
"continuity".
For rapid troubleshooting, there are
LED indicators for the Txd, Rxd and isolated
power.
Wide power supply range (9 to 36Vdc)
allows use with 9v,12v,15v,24v power supply or
direct from 12v or 24v battery systems.
Use of one 9-pin female "DCE like"
port allows use of ribbon cables from 9-pin
computer ports.
2. Installation
2.1 RS232 connection:
The ECD232fos has one 9-pin female connectors
configured in a standard DCE COM port. This
means you can use a 9-pin ribbon cable to
connect it to your standard 9-pin computer ports.
Internally, the DTR/DSR pins and RTS/CTS
pins are connected to support the use of ribbon
cables.
Standard RS232 interface device cannot
be damaged by reverse wiring or short-circuit to
ground. Be warned that some low-cost devices
use transistors to approximate an RS232 signal
and this built-in protection may be lacking. 24 to
28 AWG shielded wire is suggested.
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