K-Box: Product Manual

Introduction

The K-Box is Influx’s stackable instrumentation compatible with the ReXgen and Rebel 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.

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.

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:

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