CP-C MM messaging module Section 3 Modules
56 M&I – AC 900F Controller
CP-C MM messaging module
The CP-C-MM messaging module can be connected to the primary CP-C switch-
mode power supply units. This module monitors the input/output voltage of the
switch-mode power supply unit and signals when the corresponding limit value is
not reached.
CP-C MM messaging module for primary switch-mode power supply.png
Function
The CP-C MM messaging module indicates the correct power supply unit function
by means of LEDs and energized output relays. In addition, the power supply unit
can be switched off by closing of a potential-free contact at the “REMOTE OFF”
input.
If the supply voltage at the “INPUT” of the power supply unit falls below
82 V AC (70 V DC), the corresponding “INPUT OK” output relay (contacts 11-
12/14) is de-energized and the “INPUT OK“ LED goes off.
If the “OUTPUT“ voltage of the power supply unit falls below 19.8 V DC, the
“OUTPUT OK“ relay (contacts 21-22/24) is de-energized and the “OUTPUT OK“
LED goes off. The output voltage can only be monitored in uncoupled parallel
operation.
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