How to Use this Manual Diagram Conventions 3. How to Use this Manual This manual describes the CM2904 -module – hardware, - standard software, - module installation and gives examples of its use. 3.1. Diagram Conventions There are many connection diagrams found throughout this manual. The following...
The CM2904 is a small module that has standard software for J1939 network (with proprietary CAN messages) for expanding the system I/O. CM2904 can be utilized as interface to CAN bus. It takes measuring data from buttons, switches, potentiometers and/or joysticks- e.g. it provides interface for control elements and communication to terminal It can be used for indoor cabin –applications for...
The following sections provide detailed descriptions for each output pin-type. Refer also to previous section 5.1 for I/O –list. 5.3.1. PWM Outputs In CM2904 these are High side -type of outputs with following features: • Outputs can be used to control different types of loads: ON/OFF type solenoids Current feedback to µC ADC...
A duty cycle of 50% will produce the worst case average current flow through these two devices. 5.3.2. Reference Outputs There is two sensor supply / reference outputs in CM2904: +5V and +8V Table 9: Specifications for Sensor supply +5V Element Unit...
Over-voltage Startup threshold Input current Diagnostic LED indicator Even CM2904 can operate with 24V system voltage, its tested mainly with 12V OTICE system voltage. Refer to chapter 11- Design Verification Tests to check the compatibility against the environmental test requirements.
Measure MDIN22 regulator +8VOut (8V) A=1,6 Figure 5: CM2904 power supply architecture - internal connections 5.8. Internal Functions The following sections describe the internal functions for this product. 5.8.1. Reference Voltage Measurements Implemented for both reference voltages Voltage range 0…32V •...
CAN_1_LO MDIN_19 MDIN_20 CAN_2_LO Figure 6: Connector layout of CM2904 5.9.2. Connector Types The following table presents the CM2904 connector types: Table 12: CM2904 connector types Component Part Number Manufacturer IL-AG5-16P-D3T2 IL-AG5-30P-D3T2 The following table lists the components, which forms the mating connectors for...
CM2904 Standard software Messaging 6. CM2904 Standard software The CM2904 has standard software, which is programmed into module in Parker production. Software follows the J1939 standard for vehicle communication network and the functionality comprehends following: Measure and report digital-, analog - and frequency input values Control PWM outputs in frequency, ramp or ON/OFF modes •...
In case CAN address needs to be changed and different ID-Tag is applied, boot- up is required for module to obtain new id. For defining the module ID, the CM2904 has one module ID interface consisting of an analog module ID input: and +V reference voltage output: •...
Module Identification on network Module ID The ID-Tag defining the address for the module shall be inserted to the CM2904 7.1.1. Module ID Installation Connections connector positions MDIN20 (Idtag) and +8VOut. The following shows a typical module ID connection: CM0711...
Before mounting the CM2904, ensure you review the following environmental and mechanical requirements. Do not install the CM2904 close to any significant heat sources, such as a turbo, OTICE exhaust manifold, etc. Also avoid installing the CM2904 near any drive-train component, such as a transmission or engine block.
Installation Installing into vehicle ° ° Safe operating temperature range is –30 The CM2904 must be in an environment that does not exceed its water or C to +85 ο particle ingress rating. • The sealing standard for the CM2904 is IP20 or IP54 depending on mounting direction.
Application Examples Controlling Indicator Lights 9. Application Examples The purpose of this section is to provide examples of how the CM2904 can be used for different purposes. The following examples are covered in this section: Controlling indicator lights Controlling actuators •...
NFORMATION communicating with CM2904. CM2904 gets the commands for performing the operations from the master module via CAN -bus. CM2904 also sends the measurement data through CAN –bus to master unit. If large inductive loads are used, and the high side output is providing a continuous...
Application Examples Connecting Common Sensors 9.3. Connecting Common Sensors There are many types of sensors that can be connected to the CM2904, the most common are as follows: Open collector sensors Switch sensors • Voltage sensors • Potentiometer (ratiometric) sensors •...
Application Examples Connecting rotary encoder Ensure that voltage range of the used sensor is within allowed range of CM2904 Analog Inputs measurement range (refer to chapter 5.2.1). Potentiometers and other ratiometric type sensors can be wired directly to Analog 9.3.4.
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When planning to use CM2904 for connecting quadrature encoder in motor OTICE application (servo motor or brushless motor), ensure first the requirement from your system point of view and take into account that quadrature mode in CM2904 is specified up to 4kHz. CM2904...
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