User`s manual
NexSens Technology, Inc.
iSIC User‟s Manual 7
1.2 iSIC Specifications
Analog Inputs Standard: (4) differential or 8) single-ended
Optional: (4) differential or (8) single-ended additional
0-2.5 V auto range. 12-bit resolution.
Analog Output Standard: (1) 12-bit channel
Optional: (1) 12-bit channel
0-5 V or 0-2.5 V programmable
Power Outputs 12 V 100 mA configurable switch
5 V 50 mA analog excitation voltage
12 V output, fused from battery
Pulse Counter Tipping bucket counter, max rate: 12Hz
Digital I/O Ports Two standard generic I/O ports
SDI-12 Interface One SDI-12 port
RS-485 Interface One RS-485 port
RS-232 Interface Standard: (3) RS-232 sensor ports
Optional: (3) RS-232 sensor ports additional
Host Interface One RS-232 host port, SDI-12 or RS-485 port can be
configured as slave
Supported Serial
Communication Protocols NMEA 0183 or Modbus RTU
Internal Memory 2 MB Flash memory, over 500,000 data points minimum
Power Requirements Voltage: 10.7 to 16 VDC
Typical Current Draw 3 mA sleep, 8 mA processing, 36 mA analog
measurement
Battery 12 VDC internal battery
Temperature Range -20C to +60C
Cellular Power 350 mA receive/transmit typical, 104 mA idle, power
Requirements management available
Cellular Power GSM: Dual band 800/1900 MHz;
Frequency Range CDMA: Quad band 850/900/1800/1900 MHz
Cellular Power GSM/GPRS, EDGE, CDMA
RF Protocol
Supported AT&T, Verizon, Sprint, Alltel
Cellular Carriers