PCC-IV Instruction Manual (rev. 0.2)
Page
viii
INTRODUCTION
The PCC-IV represents the next generation of digital controllers. As a programmable logic relay, it
maintains all the advantages of single or multiple loop controllers while addressing many of the features
of PLCs and DCS I/O modules.
The m
ounting depth (will fit in 8” deep panels); NEMA 13 splash proof front panel; standard RS
-485
communications facility (Modbus protocol); Ethernet Modbus protocol; and USB/laptop and front panel
configuration capabilities are clear differences between itself and its competitors. The PCC-IV has
retained and enhanced many of the features that customers have come to appreciate about our digital
controllers… “Service Manual”
,
“Learn” function
,
“Boiler Efficiency” function
, Oxygen
Sensor/Temperature Controller, O2 signal conversion option card, and many others.
It is the flexibility of the PCC-IV, not simply as measured by its ability to function without its front panel,
but more importantly its I/O expansion capabilities and the significant number of choices available for
expansion, that render the PCC-IV an unparalleled choice for most control applications. Consider that
each PCC-IV CPU board has two expansion board slots that accept any of the available option cards
(Note: a third slot is available but is dedicated for use with only one type of option card). Consider
further that there are option cards which can perform the following:
•
Control the temperature of oxygen sensors and convert their millivolt outputs to signals useful
for control and/or monitoring applications
•
Accept both analog and digital signals as inputs and outputs in many combinations
•
Accept up to 6 isolated analog inputs, control up to 5 triac device pairs, or control up to 6 relay
outputs
As noted, the ability to install the PCC-IV CPU board alone (i.e. less front panel), with or without any of
the combination boards mentioned above, further enhance data acquisition and control capabilities.
The PCC-IV is designed with all new modern components, including a color touchscreen interface, faster
processor, more (and longer-lasting) memory, more block capacity, and modern Ethernet networking
capabilities. The new PC4_Draw programming software is .NET based and is Windows 10 compatible
and does not use the obsolete Visio program.
Replacing a PCC-III with a PCC-IV is easy. The new loop controller fits in the same cutout as the PCC-III,
and it uses the same expansion boards. Terminal blocks are the same, no field wiring changes are
required. You can use PC3_Edit to extract a program from an existing PCC-III. Then open the PC3_Edit
file in PC4_Draw to convert the program and download the new program into the PCC-IV. The PCC-IV
runs off external 24VDC power but still has the same PCC-III 120Vac I/O.
So, as you read this manual, be sure that you are clear about the vast capabilities of the PCC-IV. It is
simply not just another digital controller.
