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MCT-CM
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3.6.6 Optional Analog I/O Expansion Card Wiring
The following information covers basic input/output connection information for the MCT analog expansion card.
Since the MCT is a fully configurable control system, the use of each input/output is dependent upon the
application; therefore, the input and ou
tput devices and ‘real world’ connections are determined by the system
designer. The number of analog expansion cards in the system will also vary depending upon the application.
The MCT-CM can support up to 14 analog inputs and 7 analog outputs for a total of 7 analog expansion cards.
NOTE: The analog inputs and outputs are added sequentially as each card is added to the system. The first
card corresponds with analog inputs 1 and 2 and analog output 1. The second card corresponds with
analog inputs 3 and 4 and analog output 2. This continues with each additional card until the
maximum 7
th
card is reached which corresponds to analog inputs 13 and 14 and analog output 7.
The analog expansion card must receive separate 24VDC power from the MCT power supply. If power is not
supplied to the (+) and (-
) terminals, the input/output circuitry of the card will not operate. The ‘PWR’ indicator
light on the card indicates bus power only and that it is properly connected to the MCT CPU. It does not indicate
that the 24VDC power source is present.
IMPORTANT: The MCT CPU can only support up to seven expansion cards directly connected to it. If all
seven analog expansion cards are required for the application, contact Future Design Controls
for information regarding the use of the FC6A-EXM2 expansion interface module in order to
support more than seven expansion cards.