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Processor 40 mHz, high performance 16-bit embedded microcontroller Memory 512k NV RAM user database 128k Flash EEPROM for operating system firmware and controller configurations Supply Voltages 24 VAC/VDC 24 VA max. Communications EIA-485 @ 76.8 kbps EIA-232 PC or Modem SMART-Net™ (16 SMART-Sensors™ max) Universal Inputs 8 universal inputs 10 bit A/D convertor Analog: 0-5 VDC, 4-20 mA, thermistor Digital: dry contact Impedence: 15k O on 0-5 VDC range 250 O on 4-20 mA range 10k O on thermistor range 40 Hz pulse counting (supports flow meters) 24 VAC over voltage protection

Universal Outputs 8 universal outputs 8 bit D/A converter Analog: 0-12 VDC Digital: 0-12 VDC Manual ON provides 14.1 VDC LED indicator (glows proportionally) Output power: 75 mA @ 12 VDC 24 VAC over voltage and short protection Real-Time Clock ±1 second per day Memory/RTC Backup 72 hour battery backup Optional battery backup for 1 year lithium (offline) Dimensions 21.5 cm L x 14 cm W x 3.81 cm H (8.5” L x 5.5” W x 1.5” H) Mounting #6 clearance holes on 20.3 cm L x 12.3 cm W (8” L x 4.8” W) Weight 0.4 kg (1.0 lb.) Ambient Limits Operating: 0 °C to 40 °C (32 °F to 104 °F) Shipping: -20 °C to 60 °C (-40 °F to 140 °F) Humidity: 10% to 90% RH non-condensing