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 TECHNICAL SPECIFICATIONS FOR ST23 RTU
 
         Technical Specification
 
 Processor And Memory
 CPU Type Motorola MC68HC11 micro-controller
 CPU Speed 7.3728MHz
 RAM 32K standard CMOS static RAM 128K non-volatile static RAM for Data Logging backup by on-chip lithium battery for more then 10 years without external power
 EPROM Standard 64K CMOS Flash type EPROM
 EEPROM 512 bytes non-volatile memory for storing system parameters
 Real Time Clock CMOS Clock & Calendar, backup by on-chip lithium battery for more then 10-years without external power  Data format: sec/min/hour/weekday/day/month/year
 LCD display 2 rows x 20 characters Liquid Crystal Display (LCD)
 Keypad 4 x 4 matrix, heavy duty type
 Serial Communication Port No. 1
 Usage For GSM /SMS Modem, PSTN MODEM, portable data retriever interrogation / programming
 Interface RS232C
 Data length 8 data bits
 Data Parity None
 Baud Rate 50,300,600,1200,2400,4800,9600,19200 baud programmable
 Connector type DE-9 male with retention screws (DTE)
 LED indicators TXD, RXD, RTS
 Serial Communication Port No. 2 (optional)
 Usage CMOS Asynchronous Communication Interface Adapter For dial-up modem / radio transceiver interface/ Smart sensor / energy meter
 Interface RS232C
 Connector type DE-9 male with retention screws (DTE)
 Duplex Full or half with RTS/CTS/DTR/DCD handshaking
 Data length 7 or 8 data bits
 Data Parity odd, even or none
 Baud Rate 50,300,600,1200,2400,4800,9600,19200 baud programmable
 Input / Output
 Digital input 3 channels opto-isolated input points (5V-30V)
 Digital input 16 channels high impedance digital input points
 Digital output 2 volt-free contact outputs, rating 240V 1A each.
 Analog input 4 differential analog input channels, input range 0-20mA/4-20mA/0- 5V/0-10V. External 200ohm 1% series resistor. High accuracy A to D converter, 12 bit resolution. Equipped with moving average routine for error-free analog reading
 Pulse input Counter 2 channels, maximum response 1 KHz Opto-coupler isolation of each channel provided. With hardware filtering circuitry to eliminate double - pulse
 Fail Safe Features/Supervisory Circuitry
 Watchdog timer 1 External watchdog timer with 1.6S time-out period
 Watchdog timer 2 An MCU internal watchdog timer system
 Power Supply Section
 Supply 8- 30V DC / AC unregulated supply
 Over-voltage protection MOV varistor on unregulated supply voltage and 6.7V zener diode on regulated 5V supply
 Battery backup CR3032 3V Lithium battery to backup RAM
 Power consumption Typical 60mA (on 12VDC) in active mode, less then 1mA in sleep mode
 Internal battery backup CR2032, 3V 220mAH Lithium battery to backup basic RAM and MCU internal memory when external dry-cell battery is removed or replaced Not consumed when dry-cell battery is connected, able to operate minimum 2 years without external supply
 Indicators
 Power supply status Power on LED
 Digital input status 3 LEDs indicator for 3 points isolated digital inputs
 Digital output status 2 LEDs indicators for 2 volt-free contact output
 Pulse Input status 2 LEDs indicators for 2 pulse input points
 Communication status 3 LEDs indicators TXD,RXD, RTS
 Enclosure
 CPU Enclosure IP65 Aluminum die-casting with epoxy paint
Dimension: 270mmH x 132mmW x 93mmD
 Weatherproof  Enclosure NEMA-4X fiber-glass enclosure with lockable hinged door
Dimension: 16"H x 17.87"W x 8.74"D
 System Parameter And Settings
 RTU Identification Settable from 1 to 255 stored in EEPROM
 Network Identification Settable from 1 to 255 stored in EEPROM
 Serial Number 8 digit number stored in EEPROM
 Date/time Settable Date/ Time using keypad/LCD
 Four set of Poll ID Four set of pointer with separate poll ID (settable in portable retriever) allow same set of logged data to be retrieved by 4 different set of Master/sub-master
 High-speed Counter settable counter value using keypad/LCD
 Set factory default User may set RTU settings to factory default by using password protection option
 Logging Interval User settable Logging Interval settable from 1 seconds, 1 minute to 1440 minutes, log 4 measurement concurrently base on time
 Log Parameters
 Setting		 Allow to select 4 logging parameters selectable from any of the analog inputs, digital inputs, or pulse counters
 Event Logging Able to log event based on any of the two pulse inputs, any of the 16+3 digital inputs to record the exact date/and time of the event occurrence accurate to every seconds
 Start / Stop Logging Allow user to start/stop logging manually
 Autodump Interval User settable Automatic Report Interval (report to Master) settable from 1 seconds, 1 minute to 1440 minutes
 Debouncing User settable analog and digital de-bouncing count to eliminate error in input
 Analog Settings Allow user to set Analog Measurement parameters such as High Range (correspond to 20mA), 4mA and 20mA offset for calibration and base offset (engineering reading at 0mA)
 Digital Output Settings Allow settings of digital output format to be momentary (pulse on for 1..30 seconds) or to be permanent On/Off
 Analog Alarm Settings Allow user to set Analog Alarm threshold such as Low-Low, Low, High, High-High for alarm reporting use
 Pulse Rate Alarm Settings Allow setting of 3 levels of pulse rate alarm such as 50pulse/hour, 80pulse/hour, 120 pulse/hour
 Serial Settings All serial port parameters are settable such as baud rate, number of stops bits and parity type (even, odd, none)
 GSM Settings Allow all type of SMS related settings such as GSM network provider – 0 for MAXIS, 1 for CELCOM, 2 for DIGI1800,3 for TMTOUCH and 4 for TIME CELL.
 GMS Information Allow user to view GSM status such as GSM cellular network signal strength and current GSM activity on LCD
 SMS Users Allow storage of minimum 20 user with mobile number in RTU memory, user's mobile number editable/add-able/ removable using SMS with password protection
 Database View Allow user to view all measurement such as Analog Input channel 1..4 in raw value and engineering value, Digital Input in Binary and HEX display, Pulse Input counters value, Battery Voltage
 Check Battery Voltage Automatic checking for external and internal battery low at all time and indicate battery low by giving warning. Battery voltage is transfer to Master every time RTU is interrogated
 Instrumentation Interface
 Water Level Gauge Hydrostatic / Ultrasonic Level Sensor, Flow meter, Pressure Sensor
 Transducer 4-20mA transmitter
 Range 0 - 99.99m (water depth) or base offset + (0 - 99.99m )
 Resolution 0.1 cm for 5m range
 Accuracy 12 bit resolution, +/- 1LSB linearity
 Interface  0-20mA/4-20mA differential input (200ohm 1% series resistor)
 Local data view Yes, converted to engineering data on LCD display
 Data logging Yes, up to 4 channels with date & time stamping
 Number of channel 4 channels on-board
 Other feature 4mA offset and 20mA offset for calibration, Moving average algorithm for stable and error-free reading
 Water Level Gauge Counterbalanced Float
 Transducer Analogue-to-Digital Shaft encoder
 Range 00.00 - 99.99meters
 Resolution 1 cm (optional 1mm)
 Accuracy 1 cm (optional 1mm)
 Interface 1 TTL channel (16-bits) and 1 opto-isolated channel (16 bits)
 Local data view Yes, on LCD display
 Data logging Yes, 1 or 2 channels with date & time stamping
 Number of channel  1 channel on-board
 Flow Counter Flowmeter Output (M3/S)
 Transducer  5-30V volt input or contact closure
 Range  normal 0 – 999,999 count (maximum 4,294,967,295)
 Unit 1x M3, 10x M3 , 100x M3 or 1,000x M3
 Speed 10Hz..1Hz if filtering enabled (Maximum 1 KHz)
 Interface opto-isolated pulse input / accumulator
 Local data view Yes, counter viewable on LCD display
 Event logging Possible, 1 or 2 channels with date & time stamping
 Number of channel 2 channel on-board
 Rain Gauge Tipping bucket type rain gauge (for meteorological use)
 Transducer Reed switch contact closure
 Range 0 – 99999mm
 Resolution 0.5mm (optional 1 mm)
 Accuracy 0.5mm
 Interface opto-isolated pulse input / accumulator
 Local data view Yes, on LCD display
 Data logging Yes, 1 or 2 channels with date & time stamping
 Number of channel 2 channel on-board
 Other feature Accumulative rainfall set locally or transfer from master
   

             

 
 
 
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