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Bitrek CONNECT EX03 Expansion Module

Device Purpose

The EX03 module of Bitrek Connect is designed to work with various external sensors that have analog and discrete outputs. The data received from the sensors are processed and translated by the module to the Connect-Bus.

Scope of delivery

The EX03 module of the Bitrek Connect system comes in the following package:

  • EX03 module - 1 pc;
  • Data sheet - 1 pc;
  • Warranty card - 1 pc;
  • Packing Box - 1 pc;
  • Micro Fit 4-pin cable - 1pc;
  • Micro Fit 16-pin cable - 1pc;
  • Rubber gasket - 3pc.

Technical specifications of the device

Technical characteristics of the device are presented in the table.

Table 1: Technical specifications of the device

№ Parameters Characteristics
1 Power supply voltage from 9 V to 36 V
2 Consumption current 40mA
3 Number of analog inputs 3
4 Number of discrete inputs with active "0" 4 pcs
5 Number of discrete inputs with active "1" 4 pcs
6 Input voltage range of analog inputs from 0V to 24V
7 Input voltage range of digital inputs from 0V to 30V
8 Maximum allowable input frequency for the digital inputs 20Hz
9 Maximum allowable input frequency for high frequency digital inputs 10 kHz
10 Operating temperature range from -30°C to +80°C
11 Maximum allowable humidity 80 ±15%.
12 Dimension (W × D × H) 78 × 83 × 30 mm
13 Weight 140 g
14 Protection rating IP44

Appearance and dimensions of the device

Pin assignment

The EX03 module has three Micro-Fit connectors. These are two 4-pin connectors for connecting the Connect-Bus, and one 16-pin connector for connecting external sensors.

The four-pin connectors (Fig. 2) are Connect-Bus connectors, which have power outputs of the module and outputs of the bus signal lines.

Fig.2. Connect-Bus connectors #1 and #2

The pinout of the Connect-Bus connectors is shown in Table 2.

Table 2 The pin-out of the Connect-Bus connectors No.1 and No.2

№ Contact name Signal type Pin assignment
1 GND Power supply General line (ground)
2 CAN L Input/output Signal "CAN_L" of the CAN bus
3 + Vin Power supply "+" On-board power supply (nominal voltage 12 V or 24 V)
4 CAN H I/O signal "CAN_H" on the CAN bus

The 16-pin connector (Fig.3) is the connector for external sensors.

Fig.3. Connector for connecting external sensors.

The connector for external sensors connection is shown in table 3.

Table 3: Connector pin-out for external sensors

Pin number Pin assignment
1 Analog input 1
2 Analog input 3
3 Discrete input d_High1 (10 kHz)
4 Discrete input d_High3 (20 Hz)
5 Binary input d_Low1 (10 kHz)
6 Binary input d_Low3 (20Hz)
7 Backup
8 Backup
9 Minus power supply (GND)
10 Analog input 2
11 Discrete input d_High2 (10 kHz)
12 Discrete input d_High4 (20 Hz)
13 Binary input d_Low2 (10 kHz)
14 Binary input d_Low4 (20Hz)
15 Backup
16 Backup

Description of indication organs

On the front panel of the module on the connectors side there is one red LED, designed for indication of the connection status of the module to the Connect-Bus. If the connection is active, the LED is lit.

Description of module operation

The EX03 module of the Bitrek Connect system has three analog inputs and eight digital inputs. The digital inputs are divided into two groups: d_High, which become active when "+" power is applied, and d_Low, which becomes active when "-" power is applied.

In turn, each group of digital inputs has 2 high-frequency inputs, capable of processing the incoming signal frequency up to 10 kHz and 2 standard inputs, capable of processing the incoming signal frequency up to 20 Hz.

Description of the inputs is given in Table 3 of this manual.

The analog inputs are able to measure the voltage applied to them and transfer it to the Connect-Bus.

Discrete inputs process the signals connected to them and give the following information to the Connect-Bus:

  • the current state of the input. Displays the current state of the input - active (1) or inactive (0). This type of information can be used to control the ignition signal, alarm buttons, various limit switches, etc.

  • -Trigger input. Trigger has two stable states - on and off.

  • -frequency input. Displays the frequency value of the signal connected to the input. It can be used to control the engine speed, or to connect the frequency remote control.

  • - accumulation counter. Displays information about the number of pulses applied to the input. This counter is accumulative with the function of saving values to the module's non-volatile memory. Saving of counter values is performed once per second. Can be used for connection of pulse fuel flow meters.

Setting up the EX03 module

The EX03 module has a number of configurable parameters, the list of which is presented in Appendix 1.

The module is configured using the Bitrek Connect configurator module and Connect Configurator software. How to work with the configurator module and the software is described in detail in the document "General guide to organizing and configuring the Bitrek Connect system".

The main settings of the module:

  1. Type of used filter for ADC signal post processing (parameter 0400). The selected value of this parameter will determine the type of ADC filter to be used. the selected value of this parameter will determine the type of ADC filter to be used (absolute value, The selected value of this parameter determines the type of used ADC filter (absolute value, average value, median filtering).

  2. The switching timeout of the digital inputs (parameter 0401). On . the value of this parameter determines the minimum length of the incoming pulse, which this input can pass.

Module operation in the mode of concrete drum counter

The EX03 module of Bitrek Connect can operate as concrete mixer drum speed counter mode. In this mode, the module is able to determine the drum's movement status, direction of movement (fixation of mixing and dumping modes), as well as the total number of revolutions made by the drum.

To operate in this mode, you must connect to the module two sensors for the position of the drum of the concrete mixer. These can be inductive sensors. The main electrical requirement for the sensors is

  • Two stable states - a logical zero and a logical one on the output.

The sensors are placed at a certain distance from each other. If the barrel rotates in one direction, the first sensor will be triggered at the beginning of the movement. the first sensor is triggered, then the second one. In the opposite direction respectively first the second sensor, then the first. This the direction of the barrel movement is determined by this principle. The speed of the barrel movement is determined by the amount of time between between the two sensors.

The sensors are connected to the following inputs:

Table 4: Connection of concrete truck drum speed sensors

Sensor number Input used Pin number in 16-pin connector
1 Discrete input d_High1 (10 kHz) 3
2 Discrete input d_High2 (10 kHz) 11

Appendix 1 . Device parameters

№ Parameter name ID when configured Parameter bit Parameter assignment Default value  
1 CANSlaveAddr 0200 1 byte Device address on Connect-Bus 9  
2 DeviceName 0510 string Full device name -  
3 ADC_Period 0181 1 byte ADC channel sampling period 33 (ms)  
4 ADC_Digit_Period 0281 2 bytes Sending period of ADC and digital inputs data 993 (ms)  
5 Counter_Period 0381 2 bytes Period of sending counters of discrete inputs 1001 (ms)  
6 ADC_Filt_Type 0400 1 byte ADC post processing filter (0 - absolute value;
1 - average value;
2 - median filtering)		 2  
7 Device_Identificator 0121 4 bytes Device ID 0  
8 Device_PIN 0910 2 bytes Device access password 11111  
9 DigIN_set_timeout 0401 1 byte Digital input switching timeout (X100 µs) 0
10 Frequency_tracking_per 0402 1 byte Frequency tracking period (X60 sec) 2
11 Actual_frequency_mult 0403 2 bytes Multiplication factor of the actual mixer drum frequency 60  

Addendum 2. List of variables broadcast to Connect-Bus

№ Parameter name Width PGN StartBit Bit Total Timeout
1 Device model 4 18F713 0 32 10
2 Software version 4 18F713 32 32 10
3 Module runtime 4 18F712 0 32 10
4 Number of module starts 4 18F712 32 32 10
5 Device ID 4 18F711 0 32 5
6 Analog input 1 2 18F720 0 16 5
7 Analog input 2 2 18F720 16 16 5
8 Analog input #3 2 18F720 32 16 5
9 Trigger input d_High1 1 18F720 48 1 5
10 Input trigger d_High2 1 18F720 49 1 5
11 Input trigger d_High3 1 18F720 50 1 5
12 Input trigger d_High4 1 18F720 51 1 5
13 Input trigger d_Low1 1 18F720 52 1 5
14 Input trigger d_Low2 1 18F720 53 1 5
15 Input trigger d_Low3 1 18F720 54 1 5
16 Input trigger d_Low4 1 18F720 55 1 5
17 Current state of input d_High1 1 18F710 0 8 5
18 Current state of input d_High2 1 18F710 8 8 5
19 Current state of input d_High3 1 18F710 16 8 5
20 Current state of input d_High4 1 18F710 24 8 5
21 Current state of input d_Low1 1 18F710 32 8 5
22 Current state of input d_Low2 1 18F710 40 8 5
23 Current state of input d_Low3 1 18F710 48 8 5
24 Current state of input d_Low4 1 18F710 56 8 5
25 Frequency input d_High1 2 18F730 0 16 5
26 Frequency input d_High2 2 18F730 16 16 5
27 Frequency input d_High3 2 18F730 32 16 5
28 Frequency input d_High4 2 18F730 48 16 5
29 Frequency input d_Low1 2 18F740 0 16 5
30 Frequency input d_Low2 2 18F740 16 16 5
31 Frequency input d_Low3 2 18F740 32 16 5
32 Frequency input d_Low4 2 18F740 48 16 5
33 Cumulative counter d_High1 4 18F741 0 32 5
34 Cumulative counter d_High2 4 18F741 32 32 5
35 Cumulative counter d_High3 4 18F742 0 32 5
36 Cumulative counter d_High4 4 18F742 32 32 5
37 Cumulative counter d_Low1 4 18F743 0 32 5
38 Cumulative counter d_Low2 4 18F743 32 32 5
39 Stack counter d_Low3 4 18F744 0 32 5
40 Accumulation counter d_Low4 4 18F744 32 32 5
41 Mixer drum movement status* 1 18F750 0 8 10
42 Mixer drum speed 2 18F750 16 16 10
43 Cumulative mixer drum speed counter 4 18F750 32 32 10
  • Variable automatically determines the condition of the mixer drum:
    0 - indeterminate state
    1 - one way movement
    2 - movement in the opposite direction

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