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SCMI-03S CONTROL MODULE
Fig. 1. SCMI-03S control module
The SCMI-03S module allows you to control one or two air-conditioning (AC) units to
maintain the required temperature in rooms with servers or other devices that require a
specified temperature for their operation. AC units enable cooling or heating and, depending
on the selected mode, one selected unit can operate continuously, or both units can alternate
regularly or they can work simultaneously. The AC units are controlled by SC05010 modules,
which contain a transmitting diode operating in the infrared (IR) part of the spectrum and a
10kΩ resistance thermometer (ß = 3435). These modules must be fixed with double-sided
adhesive tape under the covers of the AC units near the receiving diode of the remote control
and their wires must be connected to the appropriate terminals of the SCMI-03S module. The
green LED of the SCMI-03S module indicates its connection to the mains supply voltage.
The yellow LEDs R1 and R2 indicate by their light the required status of the AC units and
simultaneously they indicate, by short changes of their status, sending of commands to the
corresponding AC unit. The red LED R3 flashes to indicate an error condition; the LED
continues to flash even after the malfunction has been fixed until the error list is viewed and
deleted. Error-indicating relay R3 is only activated for the duration of the malfunction. When
the On/Off input is connected to the common GND terminal, the controlled AC units are
switched off regardless of the selected operation mode of the module.
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