ATC770 Microprocessor-Based Pressure/Process Controller 9
Rear Terminal Block: 34 screw terminals with rear safety cover
2.1 MAIN POWER SUPPLY & ENVIRONMENTAL SPECIFICATION
Main Power Supply: From 100 to 240 VAC (-15% to 10%), 50/60 Hz switching. Option: 24 V AC/DC
(-10% to 10%)
Power Consumption: Max 22 VA at 50 Hz; Max 27 VA at 60 Hz
Insulation Resistance: 100 Mohm @500 VDC
Dielectric Strength: 1500 V rms for 1 min, 1800 V for 1 sec (according to EN6 1010-1)
Ambient Temperature: From 0 to 50°C
Storage Temperature: From -20 to 70°C
Humidity: Max 85% RH non-condensing
Watchdog: Hw/Sw is provided for automatic restart
Protection: Two internal dip switches for factory calibration and security codes protection
Agency Approvals: UL File # 193253, cUL pending
Self-Certification: CE
Electromagnetic Compatibility and Safety Requirements: The instrument is marked CE. Therefore, it
conforms to council directives 89/336/EEC (reference harmonized standard EN50081-2 and
EN50082-2) and to council directives 73/23/EEC and 93/68/ EEC (reference harmonized standard
EN61010-1).
Installation Category: II
2.2 DISPLAY SPECIFICATION
Display: LED technology, custom type.
Upper Digits: Red color, 5 numeric digits, 7 segments with decimal point 13.2 mm high.
Lower Digits: Green color, 5 alphanumeric digits (British flag), 14 segments with decimal points,
12.7 mm high.
Bar Graph: Red color, 35 segment with 3% resolution. Displays continuous bar graph to indicate the
measured variable of the main input (0-100% full scale). Alarm set point values displayed. Last
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