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Showing posts from June, 2008

The thermostat in the boiler room

The complex performs automatic control of the boiler houses network  with the ability to monitor and adjust the algorithm through the global network. Consists from hardware and software parts. Includes a thermostat in the boiler room and a manager. Thermostat in the boiler room Hardware: The controller is a PC / 104 processor board (2xRS232, LPT, IDE, Ethernet, VGA, keyboard, mouse). ROM - IDE M-Systems 256 Mb flash disk. Sensors - case external temperature sensor (-40:+30°С); contact feed sensor (-5:+100°С), contact sensor of return water (-5:+100°С); Cabinet temperature sensor in the room (-5:+10°C). All sensors are built on thermistors. Analog input - self-made device (4 analog inputs 8kHz -> RS232, galvanic isolation). Discrete output - self-made device (Parallel port -> 8 relays); Power supply, housing, a set of connecting wires. Optionally - a CDMA modem with a directional antenna, a radio modem, a GSM modem, a wired telephone modem. Software : Windows NT 4.0