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 TECHNICAL SPECIFICATIONS FOR ST2000
 
         Technical Specification
 
 Processor
 CPU Motorola MC68HC11A1FN microcontroller
 CPU Speed 7.3728 MHz
 RAM 32K basic CMOS static RAM (backup by Lithium battery up to 1 year)
128K extended non-volatile RAM (for data logging)
256 byte internal to MCU
 EPROM Standard 32K CMOS EEPROM
Optional 64K CMOS EEPROM divided into 2 bank of 32K each.
 EEPROM 512 bytes EEPROM internal to MCU for storing system parameters.
 SIM card Optional external 32K/64K/128K SIM card for data logging
 Real Time Clock Nonvolatile DS12C887 RTC backup by lithium battery for 10 years operation.
RTC format: sec/min/hour/weekday/day/month/year
Hardware Year 2000 compliance
 LCD display 2 rows x 20 characters Liquid Crystal Display (LCD)
 Keypad 4 x 4 matrix medium duty keypad
 Communication
 Serial Port 2 serial port (1 CPU port and 1 ACIA port)
 COMM1 :
 CPU/SCI port		 Internal to MCU. For laptop programming / interrogation / logged data retriever.
RS485 for multidrop RTU using 2 or 4 wire communication system
 Interface RS232C or 4 wire RS485
 RS-232 connector type DE-9 male with retention screws (DTE)
 Data length 7 or 8 data bits
 Data Parity None
 Baud Rate 50,300,600,1200,2400,4800,9600, 19200 baud programmable
 COMM 2 :
 ACIA port		 CMOS 65C51 Asynchronous Communication Interface Adapter
For dial-up modem / radio transducer interface
 Interface RS232C or FSK modem (1200 BPS over long distance)
 RS-232 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
 FSK Interface port Single chip Frequency Shift Keyed (FSK)MODEM
meet CCITT/ITU V23 standard
 FSK Signal Interface Transmit Pair (4V Vpp Max Adjustable),
Receive Pair (2mVpp -4 Vpp Sensitivity)
 Data Rate Forward channel at 600/1200 baud
 Duplex Full or half with RTS/PTT handshaking
 LED indicators TxD, RxD, RTS
 Transmitted frequency Mark/High 1300Hz, Space/Low 2100Hz in 1200 baud
 Special feature Carrier Detect to avoid data collision
 Input/Output
 Digital input points 16 opto isolated digital input points, 16 TTL level digital input points
 Digital output points 6 volt-free contact outputs, rating 12V 2A each.
 Analog input channels 8 differential analog input channels (4-20mA) (with 200R 1% resistor)
Configuration to except voltage input from 0-5V or 0-10V range
Using MAXIM A to D converter, 12 bit resolution. 1% accuracy
 Analog output channels 4 current output channels, output range 4-20mA.
Maximum load 450ohm per channel.
Using MAXIM D to A converter, 12 bit resolution.
 High Speed Counter 2 channels, maximum response 1 KHz
Opto-coupler isolation of each channel provided.
 Data Logging
 Data logging Standard 4 sensor readings with date & time stamping (optional 8)
 Data Type 4 parameters configurable from Pulse Input 1 or 2, Digital Input Event Sequence
Logging, level shaft encoder channel 1 or 2, any of 8 channels of 4-
20mA analog Input after conversion to engineering value
 Time Interval 1 second, 1 minute, between 1 minute .. 24 hours
 Processing  Event trigger / Change Of State / Time Trigger
 Memory Capacity 136K Byte for 362 days of continuos data logging (based on every hour)
Or 90 days of continuos data logging (based on every 15 minutes)
Local data view Yes, converted to engineering data on LCD display
 Interface Through RS232 Serial Port, COMM PORT 1 or COMM PORT 2
 Fail Save Features
 Watchdog timer External watchdog timer with 1.6S time-out period
 Internal watchdog timer An COP watchdog timer system on-chip of MCU
 Power Supply
 Supply 12V DC or 24V DC unregulated supply
 Regulator On-board 5V regulator from unregulated 12VDC supply
Separate 5V, 12V regulated supply for ADC and DAC
 Overvoltage protection 27V varistor on unregulated supply voltage and
6.8V zener diode on regulated 5V supply
 Battery backup 3V Litium Battery to backup memory (CR2032)
 Power consumption(RTU card only) Typical 75mA (without ADC, DAC and all indicators not active), maximum
460mA (with ADC, DAC and all indicators turned ON)
 Status Indication
 Power supply status Power ON LED
 Processor status Processor Running / Watch-dog LED, Processor reset LED
 Fault Indicator LED Blinking when RTU on-board fault is found
 Status enable/disable Status LED to show onboard LED indicator is enable or disabled
 Digital input status 32 LEDs indicators for 2 channel of 16 points digital inputs
 Digital output status 6 LEDs indicators for 6 replay contact output
 Pulse Input status 2 LEDs indicators for 2 pulse input points
 Modem activity status TxD, RxD, RTS LEDs for each serial port
   

             

 
 
 
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