Specifications

134 Part Number STH12 9/10
New MPC84A Portion Control Board
A new portion control board, the MPC84A, has been
developed to improve the performance and maintain
the functions and features of the previous MPC64A. In
addition this PC board has passed the very
demanding EMC testing (radio frequency emissions
and interference) for European CE approval, at the UL
labs. The MPC64A has been phased out as of 6/96
and only the MPC84A will be used on new production
and service.
The new board is the same size, same mounting
locations, and uses the same connectors as the
previous board. This article is to explain some minor
differences and features which can be used to your
advantage.
The major difference is with the same size board, the
MPC84A can control up to eight stations (dispensing
valves), with up to four sizes per station. The MPC64A
could only control up to six stations.
The first drawing depicts the connectors on the
MPC64A.
The second drawing depicts the connectors on the
MPC84A.
The Power connectors J15 and J20 (24VAC) are the
same. The Keyboard connectors J16 for touchpad
sizes and J17 for calibration touchpad and light, are
the same.
The MPC 84A adds one more two pin keyboard
connector J1. For an eight station tower, this
connector, along with a separate two wire cable to the
proper Keyboard, provides the two extra stations.
The five pin valve connectors, J7 to J12 on the
MPC64A are changed to two pin connectors, J7 to J14
on the MPC84A. These valve connectors are not
polarized (does not matter how you connect the two
pins) except when the valve has a WATER or SODA
harness.
The calibrating functions of the new portion control
board are the same as the old board.