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| rtX Powertrain I/O Specifications | |||
| Total channels |
I/O Specification |
Signal Conditioning Provided |
|
| Digital Crank-based Profile Generation for crank and angle-based triggers | 8 | High-resolution crank clock. (0.025 CA deg)Maximum frequency supports engine rate of at least 10,000 rpm. 8 crank-based digital pattern profiles synchronized with crank angle. Frequency resolution at least 0.0037 samples / second. | Vbatt level, high side or low side selectable |
| Cam signal emulation | 4 | Slew rate:150 cam deg/second. The position of the CAM teeth can be changed with a resolution of 1/10 crank angle degree. | Vbatt level output |
| Fuel Injector and Spark Measurement | 16 | 8 channels each for spark and fuel. Measure pulse duration and crank-angle for edges used for spark and fuel pulse measurements. TTL level inputs on Engine Board; Vbatt level input if SCR board is present. Crank resolution: 0.1 CA deg. Pulse time resolution: 1 microsecond. Minimum pulse of 8 microseconds. | Vbatt level input. |
| Crank Angle Monitor | 1 | This signal is a feedback of the crank signal that can be used as a model input. | n/a |
| PWM Measurement | 8 | 41.666 nanosecond accuracy at frequency up to 50 kHz | Vbatt level |
| PWM Generation | 8 | Output drivers source/sink 100 mA. 41.666 nanosecond accuracy within range 366 Hz to 12 MHz | Vbatt level, high side or low side selectable |
| Stepper Motor Measurement | 1 | Measures stepper motor position based on control signals & measure angular position of shaft encoder (2-signal type) | Vbatt-level encoded pair. |
| Frequency Measurement | 2 | Measures the frequency of an input signal. | Support Vbatt levels |
| Digital inputs & digital outputs TTL | 8 | 4 input and 4 output channels TTL level General Purpose I/O on Engine Board connector if SCR board is not used; Vbatt level input on SCR board connector. | Support Vbatt levels |
| CANbus | 2 | Selectable physical layers: ISO 11898, ISO 11519, J2411 | n/a |
| Knock Sensor Outputs | 2 | 2 channels of sinusoidal knock waveforms, gated by crank synchronous events. External noise source input. | n/a |
| Thermistor | 6 | Resistance Range covers typical range of 40 ohms to 100K ohms The performance will be equivalent to using a 15-bit DAC. Outputs are protected against shorts to +/- 50V | n/a |
| Ratiometric Analog Output: Potentiometer | 6 | 3 multiplying DACs of 16-bit resolution. The board is rated at ±10V reference input, and ±10V, ±20mA output on all channels. The MDACs can be updated individually or simultaneously. Each channel can be configured to use an external or internal reference. | Routing Provided |
| Analog Input | 32 | 32 single-ended or 16 differential 16-bit analog input channels. The input voltage range is selectable from four voltage ranges: +/- 3.3V, +/- 5V, +/- 10V, 0-5V, 0-10V | n/a |
| Analog Output | 8 | 16-bit Analog outputs. Provides +/- 10V range. 10 mA current drive. | n/a |
| General Purpose TTL I/O | 16 | 16 TTL transceivers, input/output direction selectable on an 8-channel basis | n/a |
| High Voltage Discrete Input | 16 | Provides isolated high-voltage inputs. 50V max | n/a |
| High Voltage Discrete Output | 16 | 16 isolated single pole double throw latching relays. Operate and release time is 3 ms. The contacts are rated at 30 V, 1 A, (50 V, 0.5 A) with 60 mΩ resistance | n/a |
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