CAN, GPS and IO interfaces
See Cables for a list of compatible cables for the ports on these CPU layers.
CAN ports (EXRCPU: CAN1, CAN2 or CAN3) or (EXRLCPU: 1 CAN 2)
The eDAQXR EXRCPU layer has three CAN ports, while the eDAQXR-lite EXRLCPU has two CAN ports.
See Databases for information about CAN device input and set up of CAN channels.
GPS port
The GPS port on these CPU layers supersedes the GPS ports on legacy conditioning layers. For example, the EXRCPU will not use the GPS port on an EDIO layer, and the EXRLCPU will not use the GPS port on an ELDIO layer with the GPS option.
See GPS modules for more information about compatible GPS modules.
IO (Input/Output) through the power connector (input D-Sub 15-pin male connector) pin assignments
Both the eDAQXR and the eDAQXR-lite CPU layers use the same IO configuration through the power/IO port. The power port on both CPU layers may use the cable 1-EXR-PWR-IO-PT-2. Seven pins are available on each power connector; there are two inputs and three outputs available.
Pin | Function | Pin | Function | |
---|---|---|---|---|
1 | Power (+) | 9 | Power (+) | |
2 | Power (+) | 10 | Input 1 Ground | |
3 | Input 1 | 11 | Input 2 Ground | |
4 | Input 2 | 12 | Output 1 | |
5 | Output 2 | 13 | Output 3 | |
6 | Remote switch | 14 | Remote switch Ground (-) | |
7 | Ground (-) | 15 | Ground (-) | |
8 | Ground (-) | Shell | Drain |
See Setting up a remote power switch for more information.
Specifications for input and output pins on the 15-pin female D-Sub connector on the CPU layers.
Parameter | Unit | Value |
Control I/O - connector output current sink output voltage output update rate |
- - - mV V Hz |
2 inputs (pins 3, 4, pulled up to Vin, pins 10, 11 ground), 3 outputs (pins 5, 12, 13) female 15-pin D-Sub 350 ±60 1 to 100 Hz (based on frame rate) |
Wiring diagrams
Use the Power Cable (1-EXR-PWR-IO-PT-2) to wire CPU inputs.
Preferred switch
Whenever possible, a single-pole, double-throw switch, wired as shown below, should be used for switched inputs. This circuit solidly switches the input line to either ground or +5 volts and prevents coupling of the input line to other digital input lines. Moving the switch to the ground side is identified as FALSE.
Alternate switch
The following diagram shows the circuit wiring for an alternate digital input involving a switch closure function. An open switch as shown is TRUE; a closed switch is FALSE. This circuit is adequate for most applications.
Digital output
Use the Power Cable (1-EXR-PWR-IO-PT-2) to wire CPU outputs.
Operating a 12-volt incandescent bulb
The following diagram shows an incandescent bulb (3 watts maximum) used as an indicator in the digital output circuit. An external 12-volt DC power supply provides power for the bulb. The light turns on when the output is set to FALSE.
Operating a Light Emitting Diode (LED)
The following diagram shows the use of an LED as an indicator in the digital output circuit. An external 5-volt DC power supply provides power for the LED indicator. A FALSE output causes the diode to light. The total of all diode currents must be less than 250 mA for a CPU layer. The resistor R limits the current through the diode when the LED is on. The resistor value is dependent on the requirements of the illumination device. For more information on output current limitations, refer to the EXRCPU and EXRLCPU data sheets available at www.hbm.com.