1. Invensys Controls Europe An Invensys Company EWCM 41x0 family New 32x74

2. Product description Product architecture  Panel mounting, case dimensions 32x74x75 mm (including cables)  Case plastic in ABS, UL-94 V0;  Power supply: 12 Vac 50/60 Hz;  Removable connectors (outputs and inputs);  RTC on board (for alarm history)  Number of compressors adjustable by parameter (up to 4); Advanced GUI  4 digits LED display + 18 (colour) icons and leds to improve “easy to use” Human Interface Advanced control algorithms  Historical data storage, inverter management, etc.  Inverter Control of Compressors  Inverter Control of Fans New compressors rack controller

3. Technical information Technical information: Microprocessor:8bit 14.7MHz RAM: 4 Kbyte SRAM FLASH:128 Kbyte COM1UART 1, TTL for local conn. or monitoring connection I/O’s resources: 4 A.I. 2 temp. + 2 config. (NTC/V/I or D.I.) 5 D.I.all SELV (Safety Extra Low Voltage) 4 or 5 D.O. 2A, 230Vac, SPST* 0 or 1 triac onboard2A, 230Vac 1 or 2 pulse outputs 0 or 1 A.O.SELV, V or I Power supply: 12Vac +/-10%, 50/60Hz, no insulation provided

4. Physical layout Panel Mounting Solution Bus adapter Copy Card 75mm

5. 4120 connection schemes

6. 4180 connection schemes

7. HMI: Display and Icons Fan LED Prog Menu Alarm Icon Heating mode Cool Mode Display is Temperature (C/F) Bar / Psi Display is pressure Compressor ON Not configured LED (for future) Go into machine status menu Access to subfolders Set parameters value 5 secs pressure goes into Prog. menu Increase parameter value Navigate through folders 5 secs pressure goes into band menu Decrease parameter value Navigate through folder 5 secs pressure goes into setpoint menu Exit from menues 5 secs pressure goes into a menu to select standard visualization

8. Compressors management. DIGITAL Can be used for homogeneous compressors up to 4; Higher is the distance from the set, higher is the number of step running; Start and stop values are calculated automatically dividing the band equal parts (=number of steps) Advanced policy on compressor management (Balancing / saturation / fixed sequence);

9. Compressors management. CONTINUOUS It’s a PROPORTIONAL control based on low pressure probe; Two Cut-Off function available (for minimum speed and for saturation);

10. Fans management. Uses proportional algorithm; In Chill mode can activate also “pre-ventilation” algorithm (fan speed at max before to turn on a compressor);

11. Fans management. CONTINUOUS At every start-up fans will be forced to spin at max power; If pre-ventilation is on, before to turn a compressor on fans are forced at a maximum speed.

12. Advanced functions The controller can be turned On/Off by: Keyboard; Digital input; Working hours: Thanks to the installed RTC system can record working hours; Historical Alarm: Thanks to the RTC the system can record the time of alarms;