MODEL 17B
DIFFERENTIAL MULTIPLEXER
LAWSON LABS, INC.
3217 Phoenixville Pike
Malvern, PA 19355
610 725-8800
or
800 321-5355
Rev. C
TABLE OF CONTENTS
INTRODUCTION Page 2
1. INSTALLATION Page 2
2. OPERATION Page 5
3. TROUBLESHOOTING Page 6
4. SPECIFICATIONS Page 8
WARRANTY Page 9
INTRODUCTION
The Lawson Labs Model 17B Differential Multiplexer is an
electronic switching device designed to be used in combination
with any Lawson Labs A/D card. It will allow an input channel to
be expanded to 16 independent channels. Up to four Model 17B
Multiplexers can be used with one A/D. In conjunction with Model
66 Expansion Modules, up to 32 multiplexers can be handled by a
single A/D card. The control output lines on the A/D determine
which input is selected. Both the plus and minus connections are
switched so that system flexibility and noise rejection are
maximized. All inputs are protected against overvoltages of up to
150 volts.
The Model 17B Differential Multiplexer is a self-contained
unit which connects to the computer via 7 or 8 wires. Because 16
differential circuits, each with a ground, require 48 wires,
having the multiplexer outside the computer substantially reduces
wiring congestion and the attendant hazards. The standard Model
17B Differential Multiplexer accommodates input signal levels
between plus 5.5 and minus 5.5 volts. The Model 17B can also be