Processor module (psio) – Carrier 17/19EX User Manual

Page 53

The PIC consists of 3 modules housed inside the 3 major components. The component

names and the control voltage contained in each component are listed below (also see

•

control center
–

all extra low-voltage wiring (24 v or less)

•

power panel
–

115 v control voltage

–

up to 600 v for oil pump power

•

starter cabinet
–

machine power wiring (per job requirement)

Processor Module (PSIO)

This module contains all of the operating software needed to control the machine. The open-

drive machines use a different software package within the PSIO than the hermetic machines.

There are also control hardware differences between the two types of machines. The 19EX

uses 3 pressure transducers and 8 thermistors to sense pressures and temperatures. The

17EX uses 4 pressure transducers and 7 thermistors to sense pressures and temperatures.