CPC MultiFlex PAK, User Manual

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The Inputs I/O Board Input and Output Setup • 9
4 I/O Board Input and
Output Setup
4.1. The Inputs
The inputs on a MultiFlex board are compat-
ible with a wide range of analog and digital sen-
sors and transducers. In general, the inputs are
capable of reading analog voltage signals in the
range of 0V to +7VDC and dry-contact (no out-
side voltage) digital sensors and switches.
The specific types of input devices that must
be used with MultiFlex is largely dependent on
the site controller MultiFlex is connected to;
refer to the site controller’s user’s manual for a
full list of compatible sensors and specific sen-
sor wiring instructions.
4.1.1. Input Types Supported by
the MultiFlex PAK
Input Type Description
Suct Xdcr Pressure transducer measuring
suction pressure
Disch Xdcr Pressure transducer measuring
discharge pressure
Amb Temp 1 Temperature sensor measuring
outdoor air temperature
Amb Temp 2 Optional second ambient air
temperature sensor. Will be
combined with Amb Temp 1 to
determine the ambient air temp
DischTemp 1-8 Compressor discharge temper-
ature sensors for compressors
#1 through #8
Liq Level Liquid level transducer
Comp Amps Current transducer measuring
current on the compressor pack
Cond Amps Current transducer measuring
current on the condenser
Suct Temp Suction return air gas tempera-
ture
Dig Fault External digital fault detection
device - CLOSED when the
pack is failed
Alarm Reset Input used for switch or push-
button to reset alarms active on
the PAK
VSD Fault Connected to the fault output
from the VS Fan inverter - noti-
fies the PAK of an inverter fail-
ure
Liq Level Dry-contact liquid level sensor
Table 4-1 - MultiFlex PAK Input Types