CAN Checked – CFE18 – CANbus Function Extender

$159.89

  • Very Small PCB (27x29mm) for creative mounting opportunities.
  • 9x Analog inputs, 9x Digital Inputs.
  • Compatible with multiple ECUs.
  • Specify your ECU at checkout and we’ll configure your device before shipping

8 in stock (can be backordered)

Description

CFE18 stands for “Can Bus Function Extension” or colloquially also “Can Switch Board” – why is this module needed?

Can bus connections in the vehicle sometimes pose great challenges for our customers. Especially in motorsport applications, when electronics have to be housed in the steering wheel and information from adjustment knobs (trimpots) or push buttons is then to be transmitted via Can Bus.

CANchecked now offers a small additional module with 18 connections: 9 for push buttons and 9 for analog inputs (0-5V signal).

Tested with:
– MaxxECU
– Ecumaster (EMUB and PMU)
– LinkECU
– Haltech (emulates an IO Expander A + B or just B)
– Emtron

This device is also available with a housing:  CFE18 – can switch board

CBD08 can bus distribution can hub

CFE18 - Can Bus Function Extension (Can Switch Board)

– The CFE18 hardware –


With only 29x27mm, the board is kept very compact and can be placed anywhere. The pin spacing is 2.54mm – for the power supply, for safety reasons, 3.81mm.

We have made a hole for fastening, which can be used as a screw connection.

CFE18 - can bus termination

CFE18 – Can Bus Termination

A solder jumper is attached to the circuit board.

If you close this, the Can Bus termination with 120 Ohm is active. The solder jumper is OPEN by default .


– Connections –


12V / GND (above) Power supply 6-22V (reverse polarity protected)
A0-A8 9 analog inputs (0-5V)
D0-D8 9 digital inputs (maximum 5V) (internal pull-up 20-50K)
5V / SGND Power supply for analog sensors or sensor ground
CANL / CANH Can bus connection (Can Low, Can High)
CAN 2.0 A / B – 125, 250, 500, 1000 kbps
RX / TX / DTR / GND optional: for any updates
(additional hardware required)
CBD08 can bus distribution can hub

– Motorsport steering wheel –


One application would be a motorsport steering wheel.  With just 4 connections via a curly cord (12v, Ground, CANH and CANL) a wide variety of inputs can be transmitted via Can Bus.
Trim pots, momentary buttons and latching buttons.

– Connection options –


CFE18 can switch board connection

Switches and trimpots (adjustment buttons) can be connected to the CFE18.

But sensors such as oil pressure, fuel pressure, boost pressure, exhaust back pressure and integration in a separate housing would also be possible.


– CFE18 connection / Default Can Bus Stream –


**Specify your ECU at checkout and we’ll configure your device before shipping**

The data of the inputs are queried and transmitted every 50ms (100Hz – changeable from 1Hz to approx. 300Hz – depending on the smoothing ). The data is transmitted as “unsigned big endian”.

As soon as 12V and ground are connected, the green status LED on the front lights up and the Can Bus data is transmitted.

Can Bus ID: 0x700 ( Base Data CAN ID – changeable)

byte 0 1 2 3rd 4th 5 6th 7th
Base ID AIN0 0-1023 AIN1 0-1023 AIN2 0-1023 AIN3 0-1023
Base ID +1 AIN4 0-1023 AIN5 0-1023 AIN6 0-1023 AIN7 0-1023
Base ID +2 AIN8 0-1023 bit masked DIN0-7 DIN0 0-1 DIN1 0-1 DIN2 0-1 DIN3 0-1 DIN4 0-1
Base ID +3 DIN5 0-1 DIN6 0-1 DIN7 0-1 DIN8 0-1 unused *version

* from software version 3


– AIN smoothing –


* From software version 3

If the analog inputs fluctuate too much, they can be smoothed using software. This can be configured separately for each analog input.

The analog inputs are evaluated with each transmission (default: 20Hz).

setting smoothing
0 no smoothing
1 2
2 4
3 8
4 16
5 32
6 64

If, for example, a smoothing factor of 4 is set, the average of the last 16 measurements is taken. This makes the value quieter (smoother), but also reacts more slowly to fluctuations. Here you have to find a healthy middle ground to suit your sensors and application.

The setting is made via Can Bus – see ” Configuration options ”


– Configuration options –


**Specify your ECU at checkout and we’ll configure your device before shipping**

The following values ​​can be adjusted via Can Bus:

Data CAN ID: with which Can Id the data are sent default: 0x700
Config CAN ID: with which CAN ID the board can be configured – RESTART required default: 0x70A
Frequency: with which the data are sent via the Can Bus in milliseconds Default: 10ms = 100Hz
Can Bus Speed: 1 = 125kbps, 2 = 250kbps, 3 = 500kbps, 4 = 1Mbit – RESTART required Default: 3 = 500kbps
Setting: 0 = default, 1 = EMUv3, 2 = Haltech IO12B, 3 = Haltech IO12A + B, 4 = Motec Default: 0
* Smoothing: smoothing of the analog inputs, configurable for each input (0-6) Default: 1

* from software version 3

Byte 0 + 1 are always 0x0C and 0x0A
Byte 2 Feature beginning with 0x0A

Features:
can id: 0x0A (high byte) + 0x0B (low byte)
config can id: 0x0C (high byte) + 0x0D (low byte)
frequency: 0x0E
can bus speed: 0x0F
mode: 0x10

Example 1: change data can id to 0x600

can id byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
0x70A 0x0C 0x0A 0x0A 0x06 unused
0x70A 0x0C 0x0A 0x0B 0x00 unused

Example 2: change frequency to 50Hz (20ms = 0x14 in hex)

can id byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
0x70A 0x0C 0x0A 0x0E 0x14 unused

Example 3: change can bus speed to 1Mbit

can id byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
0x70A 0x0C 0x0A 0x0F 0x04 unused

Example 4: change mode to EMUv3

can id byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
0x70A 0x0C 0x0A 0x10 0x01 unused

Example 5: change smooting on AIN1 to 4 (= 16)

can id byte 0 byte 1 byte 2 byte 3 byte 4 byte 5 byte 6 byte 7
0x70A 0x0C 0x0A 0x20 0x04 unused

(0x20 = AIN1, 0x21 = AIN2, 0x22 = AIN3 …, 0x28 = AIN8)


– Control unit / ECU configuration –


**Specify your ECU at checkout and we’ll configure your device before shipping**

The analog inputs provide 10-bit resolution and thus values ​​from 0 to 1023. The value must be converted in the control unit. All values ​​are “unsigned big endian”

Examples:
5V voltage AIN0
0x700 Byte0 + 1
multiplier: 5; Divisor: 1023; Offset: 0

or multiplier: 0.004887585533

Exhaust gas temperature (type k) AIN7:
0x702 Byte6 + 7
multiplier: 1250; Divisor: 1023; Offset: 0

or multiplier: 1.2218963832


Either the individual bytes are used for the digital inputs. Eg DIN6: 0x702 byte 6 or the bit mask at 0x702 byte2

eg DIN6: 0x702 Byte2 Mask: 0x40


– Documentation / download –


You can also download this page as a PDF here:

Additional information

Weight 0.3 kg
Dimensions 20 × 20 × 10 cm

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