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Processor 50 mHz, high performance, 16-bit embedded microcontroller Memory 512k NV RAM user database 512k Flash EEPROM operating system firmware and controller configurations Supply Voltages 24 VAC/VDC, 24 VA max. Communications EIA-485 @ 76.8 kbps max. EIA-232 @ 57.6 kbps max. PC or Modem SMART-Net™ (16 SMART-Sensors™ max.) Universal Inputs 8 universal inputs (expandable to 32) 10 bit A/D convertor Analog: 0-5 VDC, 4-20 mA, thermistor Digital: dry contact Impedence: 15k Ω on 0-5 VDC range 250 Ω on 4-20 mA range 10k Ω on thermistor range 40 Hz pulse counting (supports flow meters) 24 VAC over-voltage protection

Universal Outputs 8 universal outputs (expandable to 32) 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 capacitor backup Optional battery backup for 1 year lithium (offline) Dimensions 21.7 cm L x 13.2 cm W x 4.3 cm H (8 1/2" L x 5 3/16" W x 1 11/16" H) Mounting #8 clearance holes on 20.3 cm L x 12 cm W (8" L x 4 11/16" W) Weight 0.4 kg (1.0 lb.) Ambient Limits Operating: -20 ºC to 55 ºC (-4 ºF to 131 ºF) Shipping: -20 ºC to 60 ºC (-4 ºF to 140 ºF) Humidity: 10% to 90% RH non-condensing