CPC MultiFlex PAK, User Manual

Page: 9 / 52

MultiFlex PAK Overview of the MultiFlex Product Line • 1
1 Overview of the Multi-
Flex Product Line
The MultiFlex line of control system boards
provides a wide variety of input, output, and
smart control solutions, all of which are based on
a single universal hardware platform. The board
design uses flash-uploadable firmware and plug-
in expansion boards to configure the base plat-
form board and apply it for use as an input
board, relay output board, analog output board,
or a combination I/O board.
1.1. MultiFlex PAK
The PAK is a distributed pack controller that
controls compressors and condenser fans. The
PAK can control up to 16 compressors, con-
trolled in up to 8 compressor groups.
The PAK can control up to 4 condenser fan
groups containing up to 8 total condenser fans.
The PAK condenser control strategy is sequen-
tial TD control with setpoint/deadband using ON
and OFF delays. The PAK supports use of both
single-speed fan stages and VS fans.
1.1.1. Hardware
The MultiFlex PAK boards consist of two
circuit boards: a bottom layer with 16 combina-
tion digital/analog inputs, and a plug-in top layer
which contains a combination of 8 relay outputs
and 4 analog DC voltage outputs, which can be
used as digital or analog outputs.
The communication interface is RS485 I/O
using the Standard Extended Address Form for
CPC Distributed Controllers. Currently, the PAK
is designed to interface with the CPC E2 RX
controller, and the previous generation refrigera-
tion controller, the Einstein RX.