©2008 Ingersoll Rand Company Page 2
and compressor remote connectivity to other
devices.
This controller is offered in either a standard
configuration or an enhanced configuration. The
differences will be indicated in this manual by
show the following guides after each input or
output device or software function.
Std – Standard Controller
Enh – Enhanced Controller
The S3 controller has three (3) Analog Inputs,
one (1) Analog Output, eight (8) Digital Inputs,
and six (6) Digital Outputs. This controller also
has capabilities of using both Multi-485 and
Modbus communication protocols.
Component Review
Analog Inputs
4APT
[Std] – This pressure transducer used to
convert the package discharge pressure of the
compressor into a 4-20ma analog signal to the
controller. This sensor has a supply voltage of
24VDC, and wired into terminal block XO5 pins
1 & 2 on the backside of the controller. The
output analog signal ranges from 4ma at 0 psi to
20ma at 232psi.The output signal is processed
by the Intellisys and depending on the voltage
the controller may cause a change in the
pressure readout on the display, load or unload
the compressor, or even shut the compressor
down if conditions dictate.
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