RST Flexi-Mux Instruction Manual
ELM0029B
RST Instruments Ltd.
Page 1
1
O
VERVIEW
The RST Flexi-Mux is designed to increase the number of sensors that can be measured
with a datalogger. The Flexi-Mux is located between the datalogger and the sensors and
allows a single channel of a datalogger to be sequentially connected to numerous
sensors. Each Flexi-Mux can sequentially multiplex 5 groups of 4 wire inputs or 10 groups
of 2 wire inputs. Internal DIP switch settings permit the changing of these settings. The
system can be expanded by chaining together multiple Flexi-Muxes allowing the signals to
cascade through the system. This allows a virtually unlimited number of sensors to be
connected to a single channel.
The datalogger program and control ports advance the Flexi-Mux through each sensor.
An added feature of the RST Flexi-Mux is that it contains internal transient protection on
each individual line. Unlike traditional multiplexers, this negates the need for external
transient protection devices to be installed saving cost, wiring and time deploying the
system.
2
F
UNCTION
The RST Flexi-Mux allows a single channel of a datalogger, such as a Campbell Scientific
CR6, to be sequentially connected to numerous sensors. Each Flexi-Mux can
sequentially multiplex 5 groups of 4 wire for a total of 20 wires. Alternatively, internal DIP
switch settings permit the multiplexing of 10 groups of 2 wires.
The extremely slim and compact (8.15” H x 1.05” W x 3.07” D) vertical design permits the
Flexi-Mux to occupy minimal space in the control box which allows for more Flexi-Mux
units to be installed. By utilizing a unique cascade feature, there is theoretically no limit to
the number of channels which can be connected to the datalogger. Figure 2-1 highlights
the cascading feature.