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AnalogX

Introduction

AnalogX is a compact and lightweight 4 channel Analog to CAN I/O expander, designed to be installed in-line with your wiring harness and specially designed for the harsh automotive electrical environment.

AnalogX icons.jpg


AnalogX provides 4 buffered and protected 0-5v sensor inputs and can broadcast the sensor values between 1 and 255Hz. It also provides a 0.5A 5v reference for powering sensors.

Parts in the Kit

In the kit you will receive:

  • AnalogX module
  • 4 wire power and CAN pigtail
  • 6 wire analog sensor input pigtail
  • 1" shrink tube for installation

Specifications

Feature Description
Analog input voltage range 0 - 5v
DAC resolution 12 bit SAR
Sample output format 0 - 5000mV
Input impedance Greater than 10 Meg Ohm
Input voltage protection 100v
Pullup resistor Optional on-board 2.2K pullup resistor for each channel (jumper enabled)
Power input 9 - 15volts, protected to 40v (intermittent)
Weight 6 grams
Dimensions 0.72" x 1.93" (18.3mm x 48.7mm)
CAN baud rate 500K and 1M, jumper configurable
Address Space 4 separate address spaces allows up to 4 AnalogX modules to operate on the same CAN network. (jumper configurable)

Wiring

Power and CAN

Color Assignment Notes
Red 9-15v Power Connect this to switched ignition power. 0.25A max consumption.
Orange CAN High
Blue CAN Low
Black Ground

Sensor connections

Color Assignment Notes
Blue Analog 1 input 0-5v input
Purple Analog 2 input 0-5v input
Pink Analog 3 input 0-5v input
Brown Analog 4 input 0-5v input
Yellow Voltage reference output 5v @ 0.5A
Black Ground reference

Installation

AnalogX was specifically designed to fit right into your wiring harness for a streamlined, efficient and lightweight installation. Use the included 1" shrink tubing to encase and protect the unit when you are ready to integrate it with your harness.

AnalogX CAN bus API

Overview

The CAN bus API provides the configuration and control interface for AnalogX

CAN base ID

CAN base ID is 0xE4600 (935424)

Adjusting Base ID

The base address is determined by the state of the ADR1 and ADR2 jumpers. By default, the jumpers are closed (bridged); the jumper can be opened by cutting the trace between the pads. To re-close the jumper, add a small amount of solder to bridge the gap between the pads you want to close.

  • Opening the jumper ADR1 will add 256 to the base ID
  • Opening the jumper ADR2 will add 512 to the base ID.

The combination of jumper settings will allow up to 4 AnalogX units to coexist on the same CAN bus.

ADR2 Jumper ADR1 Jumper Address
Closed Closed 0xE4600 (935424)
Closed Open 0xE4700 (935680)
Open Closed 0xE4800 (935936)
Open Open 0xE4900 (936192)

CAN Baud rate

500K and 1MB rates are supported.

500K is enabled by default; cut the jumper labeled BAUD on the bottom of AnalogX to enable 1MB rate.

CAN Messages

Announcement

The announcement message is broadcast by the AnalogX upon power up.

Address

CAN ID: Base + 0

Offset What Value
0 Channel Count Total number of channels on device
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Major Version Firmware Major Version Number
6 Minor Version Firmware Minor Version Number
7 Patch Version Firmware Patch version number

Configuration Group 1

Configures options for AnalogX.

Send this message to AnalogX to configure runtime settings.

  • Note: Settings are volatile and are not persisted across power cycles.

Address

CAN ID: Base + 3

Offset What Value
0 Sample Rate Rate to report sensor values ( 1 - 255Hz). Default sample rate is 50Hz.
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Reserved
6 Reserved
7 Reserved

Statistics

Broadcast by AnalogX every 1 second.

Address

CAN ID: Base + 2

Offset What Value
0 Current Sample Rate 1 - 255Hz
1 Reserved
2 Reserved
3 Reserved
4 Reserved
5 Major Version Firmware Major Version Number
6 Minor Version Firmware Minor Version Number
7 Patch Version Firmware Patch version number

Sample Broadcast

Sample Broadcast for Analog inputs. The samples are broadcast based on the configured sample rate (default is 50Hz)

Scaling and Data format

  • Scaling: 0-5000mV
  • Data format: Little Endian

Address

  • CAN ID: Base + 20
Offset What Value
0 Channel 1, low byte
1 Channel 1, high byte
2 Channel 2, low byte
3 Channel 2, high byte
4 Channel 3, low byte
5 Channel 3, high byte
6 Channel 4, low byte
7 Channel 4, high byte