The SomatXR system CX23-R controller provides connections for sourcing input data channels through six connectors - one digital input/output, one GPS, one AUX, and three CAN.
Transducer | Wiring Diagram | |
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Digital input/output |
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CAN bus |
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GPS |
The DIO port provides pin connections for three sensor input lines, two current sinking output lines, one power output line, one cable detect pin and individual shield/ground connections for all five input and output lines.
The DIO input lines have an input impedance of 10 KΩ, are over-voltage protected up to ±70 V and support user-defined static upper and lower thresholds in the range of ±V to a resolution of 20 mV. The -3 dB bandwidth is 4 MHz, with start of attenuation roll off at nominally 1 MHz.
The DIO outputs can sink 350 mA to ground and are over-voltage protected up to ±60V. They are designed to drive LEDs, relays and other indicators and control at maximum update rates of 20 Hz nominally.
The DIO power supply provides power up to 3 W at user-selectable voltages of 5 V or 12 V (within ±5% accuracy).
The GPS port uses an RS232 serial port with additional control lines to communicate to Somat EGPS modules (full firmware support currently limited to the Somat EGPS-5HZ module). The CX23-R processes standard NMEA formatted GPS messages to provide navigation and time channels at 5 Hz update rates.
The AUX port is configurable to support a variety of custom interfaces. Currently, not supported.
The three CAN ports are functionally identical and functionally independent. The CAN ports are ISO 11898 CAN 2.0(A&B) compliant and support J1939 (limited to 8 byte data payloads). The CX23-R supports import of CAN databases in the Vector DBC file format.
Each port provides an internal termination resistor that can be switched in or out under user control. Each port provides passthrough power (from the CX23-R power supply source) limited to 1 A current draw. This can be used to power CAN devices such as the SomatCR 1609 CAN temperature measuring module.
The CX23-R supports baud rates of 1000K, 800K, 667K, 500K, 400K, 250K, 125K, 100K, 50K and 41.6K.