B+B SmartWorx 232MDS User manual

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QUICK START
GUIDE
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Recommended Accessories
Before you begin, be
sure you have the following:
232MDS
Serial Modem Data Splitter
+ 232MDS Modem Data Splitter
+ Serial cable (not included)
DB9F to DB25M Serial Cable
Model 232CAM
6 ft. / 1.8 m
DB9F to DB25M Serial Cable
Model 232CAMS
6 in. / 15.2 cm
DB25M to DB25F Serial Cable
Model 232AMF5
6 ft. / 1.8 m

Product Overview
Installation
To install the Modem Data Splitter, connect a “straight
through” cable (Pin 1 to Pin 1, Pin 2 to Pin 2, etc.) between
the modem data splitter and the modem. Any pin-reversing
or jumpering should be done on the cables that connect to
the computers or terminals.
The Modem Data Splitter can be connected so that two
computers or terminals can use one modem without
switching. The Modem Data Splitter can be used to combine
two DTE ports and connect them to a DCE port.
All signals entering the female DTE connectors on pin
2 (Transmit Data), 4 (Request To Send), and 20 (Data
Terminal Ready) are diode OR’d together and appear as
outputs on the male DCE connector. Pins 3 (Receive
Data), 5 (Clear To Send), 6 (Data Set Ready), and 8 (Carrier
Detect) are normally outputs from a DCE port, so they are
connected directly from the male to all female connectors.
The Modem Data Splitter is self-powered from the male
DCE (modem) port, and can be left permanently installed.
To ensure proper operation, lines 2, 4, and 20 on the
unused female inputs should be low or open to allow the
other inputs to operate properly. Pins 1 and 7 are connected
to provide a ground path.
To Modem
RS-232
Modem Data
Splitter
advantech-bb.com
DB25
Female
Port
DB25
Female
Port
DB25 Male Port