# K-Box: Product Manual

### Introduction

The K-Box is Influx’s stackable instrumentation compatible with the [ReXgen](https://app.gitbook.com/o/HhTfJJOHHF3lfqYUgSrl/s/TCRfbN5hBLeUzIaKHbJ7/) and [Rebel ](https://app.gitbook.com/o/HhTfJJOHHF3lfqYUgSrl/s/enX58y5hTu5O8sufLoOA/)range of data loggers. It can also be integrated with any device configured via DBC files, other logger systems, or output signals CAN to the [Rebel Dash display](https://app.gitbook.com/o/HhTfJJOHHF3lfqYUgSrl/s/STCGZzKYrBpVw1q9UATP/).

The K-Box is an ideal solution for applications that require a large number of thermocouples and analog inputs. The K-Box’s accurate sensor data is transmitted periodically on the CAN bus, enabling multiple devices to be connected. The K-Box CAN bus settings, calibration, and sampling rates are all easily configurable, and these settings are stored within the K-Box even when the device is not powered.

<figure><img src="https://1039220062-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRhWtYvkHNZy7Jvdnc3wk%2Fuploads%2F9K7dtmuc398Wsy5G4Fmg%2Fimage.png?alt=media&#x26;token=4fd80ce8-6906-4f0e-98df-f9a629600b56" alt=""><figcaption></figcaption></figure>

#### &#x20;Advantages:

* Wide switchable software voltage input ranges ±80V, ±40V, ±20V or ±10V.
* Accuracy: - Analog ±0.0015%, Thermocouples ±0.08%.
* High input impedance.
* They have isolated Differential Inputs to prevent earthing problems.

#### Key features:

* Stackable enclosure.
* Simple signal configuration using a DBC file.
* Each unit enables up to 8 K-type connections at a 20Hz sampling rate and 8 analog inputs at a 1kHz sampling rate.
* Pulse Width Measurement: 3 inputs frequency measurements or pulse measurements.
* Regulated +5V and +12V output power supply for external sensors.
* Instrumentation data time is synchronised with the recorded vehicle network data.
* Analog inputs and thermocouple inputs are galvanically isolated.
* Connect and measure data from up to 4 IEPE sensors using the K-IEPE addon.
* Measure temperature using RTDs with K-PT100/1000 addon.

#### Technical Specification:

<table><thead><tr><th width="297.35483870967744">Technical Data</th><th width="410">Description</th></tr></thead><tbody><tr><td>Power supply</td><td>6V to 36V DC.</td></tr><tr><td>Interfaces</td><td>CAN Bus</td></tr><tr><td>PC interfaces</td><td>None</td></tr><tr><td>Enclosure</td><td>Dimension (L115xH79xW105) / Weight 450g / IP65 / ABS</td></tr><tr><td>Environmental</td><td>-40°C to +85°C Humidity max 90%</td></tr><tr><td>Output voltages</td><td>5V and 24V (Max current drawn 80 mA combined)</td></tr><tr><td><strong>Analog Inputs</strong></td><td></td></tr><tr><td>Number of channels</td><td>8 Bipolar differential inputs</td></tr><tr><td>Accuracy</td><td>±0.0015%</td></tr><tr><td>Software switchable range</td><td> ±80V, ±40V, ±20V, ±10V</td></tr><tr><td>Resolution (ADC)</td><td>16 Bit</td></tr><tr><td>Max Sampling Rate</td><td>1 KHz (all 8 channels), 2 KHz (4Channels), 10 KHz (2 Channels)</td></tr><tr><td>Input impedance</td><td>> 4 M Ohm</td></tr><tr><td>Max input voltage</td><td>±75 Analog Ground, ±34V Analog inputs</td></tr><tr><td> <strong>Thermocouple Inputs</strong></td><td></td></tr><tr><td>Number of channels</td><td>8 J/K/T-type inputs</td></tr><tr><td>Accuracy</td><td>±1°C accuracy</td></tr><tr><td>Measurement Range</td><td>Measurement: -200 °C to 1250 °C</td></tr><tr><td>Max Sampling Rate</td><td>10 Hz (all 8 channels)</td></tr><tr><td>Maximum input voltage</td><td>±3.3 V</td></tr><tr><td> <strong>Digital Input / Output</strong></td><td></td></tr><tr><td>Number of channels</td><td>×4 unipolar single-ended hardware configured as inputs or outputs</td></tr><tr><td>Input switching thresholds</td><td>Low &#x3C; 1.5V</td></tr><tr><td></td><td>High > 2.0V (up to 12V)</td></tr><tr><td>Input leakage current</td><td> &#x3C; 10nA</td></tr><tr><td>Output states</td><td>(Optional) Open collector - 510 Ohm </td></tr><tr><td><p>Output drive capability (OK):</p><p>Collector-emitter voltage</p></td><td>45V max</td></tr><tr><td>Collector current (DC)</td><td>10mA max</td></tr><tr><td>Saturation voltage (OK on)</td><td>&#x3C; 0.15V</td></tr><tr><td>Equivalent on-resistance</td><td>&#x3C; 510Ohm</td></tr><tr><td>Leakage current at OK off</td><td>&#x3C; 5uA</td></tr><tr><td>Min-max applied voltage</td><td>Digital input -8V to +12V; Digital output 0V to +40V power supply, which limits the current to 10mA</td></tr><tr><td>PWM</td><td>3 digital input frequency measurements up to 100kHz or pulse measurements. (min 100 Nano sec) (between pulses 10 microseconds)</td></tr></tbody></table>