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Vansco VMM3120 User Manual

Multiplexing module
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Vansco Multiplexing Module
VMM3120
U s e r G u i d e
H Y 3 3 - 5 0 0 4 - I B / U S
U G - V M M 3 1 2 0 - 0 9 1 6 0 1 4 - 2 0 1 7 0 5 - 0 0 2

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Summary of Contents for Vansco VMM3120

  • Page 1 Vansco Multiplexing Module VMM3120 U s e r G u i d e H Y 3 3 - 5 0 0 4 - I B / U S U G - V M M 3 1 2 0 - 0 9 1 6 0 1 4 - 2 0 1 7 0 5 - 0 0 2...
  • Page 2 Parker Hannifin Canada Electronic Controls Division 1305 Clarence Avenue Winnipeg, MB R3T 1T4 Canada office +1 204 452 6776 +1 204 478 1749 http://www.parker.com/ecd Copyright 2017 © Parker Hannifin Corporation. All rights reserved. No part of this work may be reproduced, published, or distributed in any form or by any means (electronically, mechanically, photocopying, recording, or otherwise), or stored in a database retrieval system, without the prior written permission of Parker Hannifin Corporation in each instance.

  • Page 3: Table Of Contents

    2.3. Install the Required Software Tools ..................6 2.3.1. Install the Data Link Adapter Driver Software ............. 6 2.4. Connect the VMM3120 multiplexing module to a Development System ........7 2.4.1. Power Up the Development System ................8 2.5. Create and Download Ladder Logic Applications ..............9 3.
  • Page 4 8.3.1. Dimensions ........................ 52 8.3.2. Selecting a Mounting Location ................... 52 8.3.3. Mechanical Requirements ..................52 8.3.4. Mounting the VMM3120 to a Vehicle ................. 53 9. Application Examples ..................... 54 9.1. Implementing Safety Interlocks ....................54 9.2. Controlling Indicator Lights ...................... 55 9.3.
  • Page 5 Contents 9.7.7. Potentiometer (Ratiometric) ..................67 10. Startup ..........................68 11. Tests ..........................70 12. Glossary ......................... 73 13. Index ..........................80 User Guide...

  • Page 6: Publication History

    Publication History The following table provides an overview of the changes made to this document over the course of its publication history. Revision Description of Change Rev. 001 First release of this document Rev. 002 New template, minor edits 05/2017 User Guide...

  • Page 7: Safety

    Safety Do not perform the procedures in this manual unless you are experienced in the handling of electronic equipment. Contact the manufacturer if there is anything you are not sure about or if you have any questions regarding the product and its handling or maintenance. The term "manufacturer"...

  • Page 8: Welding After Installation

    Safety during installation Incorrectly positioned or mounted cabling can be influenced by radio signals, which can interfere with the functions of the system. viii VMM3120...

  • Page 9: Safety During Start-Up

    Safety Safety during start-up Danger! Risk of death or injury. Do not start the machine's engine before the control system is mounted and its electrical functions have been verified. Do not start the machine if anyone is near the machine. Safety during maintenance and fault diagnosis Before performing any work on the hydraulics control electronics, ensure that ...

  • Page 11: About The Vmm3120

    VMM3120 can be used in any CAN 2.0B application. The VMM3120 is controlled by ladder logic software.  You can write the software in ladder logic using the Vansco Multiplex Module Software (VMMS) tool. Contact your Parker Vansco Account Representative for more details about the VMMS.

  • Page 12: Diagram Conventions

    The VMM3120 has two Ampseal connectors (2 x 35 pin, keyed) that are used to interface with the inputs, outputs, and CAN  The VMM3120 has 3 LEDs that can be used to indicate the status of inputs, outputs, power, and CAN ...
  • Page 13 About the VMM3120 Symbol Meaning General input General output Frequency input Analog input Frequency sensor Pulse sensor Resistive sensor General sensor Application switch Load Pull-down resistor Pull-up resistor Battery User Guide...
  • Page 14 About the VMM3120 Symbol Meaning Fuse Resistor Ground Chassis ground VMM3120...

  • Page 15: Quick Start

    The following is a high-level overview of the steps involved with this section: 1. Gather the required materials. 2. Install the required software tools provided by Parker Vansco. 3. Connect the VMM3120 to a development system (desktop) and power it up. 4. Download application software. 2.2. Gather Required Materials The following materials are required for the procedures in this section: ...

  • Page 16: Install The Required Software Tools

    Before using the VMM3120 multiplexing module, install the following software tools onto your PC:  Data Link Adapter (DLA) drivers  The DLA acts as the interface between the PC and the VMM3120. Before using the DLA, you must install the DLA drivers.  Parker Vansco Software Tools ...

  • Page 17: Connect The Vmm3120 Multiplexing Module To A Development System

    2.4. Connect the VMM3120 multiplexing module to a Development System It is a good idea to connect the VMM3120 multiplexing module to a development system (PC, Controller I/O Board, power source, and DLA) to verify your application. The development system is an ideal environment for creating and downloading software applications.

  • Page 18: Power Up The Development System

    Quick Start 1. Connect the Controller I/O harness to the VMM3120 multiplexing module. 2. Connect the Controller I/O harness to the controller I/O board connectors. 3. Connect the evaluation kit power/CAN harness to the controller I/O board’s JP3 connector. 4. Do not connect the power wire (RED) from the evaluation kit power/CAN harness to the power supply (+) terminal at this time.

  • Page 19: Create And Download Ladder Logic Applications

    Software applications can be created and downloaded to the VMM3120 multiplexing module. The software applications for the VMM3120 can be created with the Vansco Multiplexing Module Software (VMMS) tool, using ladder logic. Consult your Parker Vansco Account Representative for information about your software programming options.

  • Page 20: Inputs

    Do not connect inputs directly to unprotected inductive loads such as solenoids or relay coils, as these can produce high voltage spikes that may damage the VMM3120. If an inductive load must be connected to an input, use a protective diode or transorb.
  • Page 21  Wetting current is determined by the value of the resistor. The maximum allowable wetting current in the VMM3120 is 10 mA. Wetting currents greater than 10 mA must be incorporated using resistors embedded in the system harness.
  • Page 22 A digital input is typically connected to a switch that is either open or closed.  When an active-high switch is open, the pull-down resistor ensures that no voltage exists on the input signal, which will be interpreted by the VMM3120 as inactive. ...

  • Page 23: Addressing Inputs

    Inputs 3.1.2. Addressing Inputs Digital inputs ADDR1, ADDR2 and ADDR3 are dedicated address inputs. These inputs are used to set the system address on the module such that it is unique among all other modules in the system. The maximum allowable addresses in a VMM system is 31.

  • Page 24: Power Control Digital Inputs

    The power control digital input wakes-up the VMM3120 when switched high to a voltage of 4.0 V or greater, and turns the VMM3120 off when switched low to a voltage less than 1.5 V. The VMM3120 will also shut off when an open circuit condition occurs on the power control digital input.
  • Page 25  To protect the harness that connects the VMM3120 to the ignition, place a fuse of 200 mA or higher in the circuit that feeds the VMM3120. ...

  • Page 26: Analog Inputs

    3.2. Analog Inputs Analog inputs are typically used to read electrical signals that span a voltage range. The VMM3120 has up to 10 analog inputs:  INPUT20_A through INPUT29_A Analog inputs can be configured to function as standard digital inputs.

  • Page 27: Analog Input Configuration

    Inputs The following table provides specifications for the VMM3120's amplified analog inputs: Analog Input Specifications Item UNIT Input voltage range Valid voltage range Ω Pull-down resistance 33.2K Overvoltage Resolution Accuracy ADC reference voltage 2.994 3.006 Frequency cutoff 3.2.2. Analog Input Configuration With analog inputs INPUT20_A through INPUT23_A: ...

  • Page 28: Analog Input Installation Connections

    Analog inputs are more susceptible to system noise than digital inputs. Too much system noise can create inaccurate analog input readings. To reduce system noise  Use the shortest possible wires when connecting sensors to analog inputs, to prevent noise pickup on the sensors. VMM3120...
  • Page 29 This will help ensure the signal remains within the digital activation range of the input. Note: The VMM3120 system ground inputs are rated for low-current signals, and ensure the sensor's ground is very close in voltage potential to the VMM3120 ground.
  • Page 30 Connect a ground wire from the sensor's mounting location to analog input 1. Analog input 1 can be configured as a negative amplifier, allowing it to detect a difference between the voltage of the VMM3120 ground and the voltage of the sensor ground (the difference is the ground shift).

  • Page 31: Frequency Inputs

    Figure 10: Analog input with ext. pull-up for sensors without ground wire 3.3. Frequency Inputs Frequency inputs are typically used to read pulse signals. There are two types of frequency inputs in the VMM3120:  AC-coupled frequency inputs ...
  • Page 32 Inputs Note: Quadrature and pulse counting is possible; however, we recommend to not use these functions with AC-coupled frequency inputs. The following table provides specifications for the VMM3120's AC-coupled frequency inputs: AC-Coupled Frequency Input Specifications Item UNIT Input voltage range Ω...
  • Page 33 This will help ensure the signal remains within the digital activation range of the input. Note 1: The VMM3120 system ground inputs are rated for low-current signals, which ensures the sensor’s ground is very close in voltage potential to the system ground.

  • Page 34: Dc-Coupled Frequency Inputs

    DC offset. These inputs are ideal for use with hall-effect type sensors. Note: Quadrature and pulse counting is possible with DC-coupled frequency inputs. The following table provides specifications for the VMM3120's DC-coupled frequency inputs: DC-Coupled Frequency Input Specifications Item UNIT...
  • Page 35 Inputs 3.3.2.2. DC-Coupled Frequency Input Configuration The DC-coupled frequency inputs use a pull-up resistor. The following diagram shows the configuration for DC-coupled frequency inputs: Internal to product Application sensor Filter Pull-up/down option Figure 12: DC-coupled frequency input configuration User Guide...
  • Page 36 This will help ensure the signal remains within the digital activation range of the input. Note 1: The VMM3120 system ground inputs are rated for low-current signals, which ensures the sensor’s ground is very close in voltage potential to the system ground.
  • Page 37 Inputs The following shows a typical DC-coupled frequency input connection: Internal to product Sensor Voltage Hall Effect Sensor DC Coupled Frequency Input Sensor Ground Figure 13: DC-coupled frequency input installation connections User Guide...

  • Page 38: Outputs

    When a high-side output is used as a PWM signal, a pulsed output signal is provided by the VMM3120, where the percentage of time that the output is on vs. off is determined by the duty cycle of the signal, and the duty cycle is determined by the application software.

  • Page 39: High-Side Output Configuration

    When a high-side output is used as an on/off signal, the output provides battery voltage when in the on state (the application software is responsible for switching high-side outputs on and off). The following table provides specifications for the VMM3120's high-side outputs: High-Side Output Specifications Item...

  • Page 40: High-Side Output Installation Connections

    PWM signal, the PWM peak current must not be greater than the specified continuous current for the output (in continuous mode, the average current flow through the diode at 50% duty cycle is approximately equal to ½ the peak current). VMM3120...
  • Page 41 2.5 A. Note: How an output is de-rated is based on how all outputs are being used collectively on the VMM3120. There are two issues that must be addressed to determine the de-rating for high- side outputs: current and power dissipation.

  • Page 42: High-Side Output Diagnostics And Fault Detection

    Power dissipation You must determine how much power is dissipated by each output. The total allowable power dissipation inside the VMM3120 must be less than 7 W, which will eliminate the need for additional heat sinking. Most of the power dissipation comes from the output drivers.

  • Page 43: Low-Side Outputs With Current Sense

    When a low-side output is used as a PWM signal, a pulsed output signal is provided by the VMM3120, where the percentage of time that the output is on vs. off is determined by the duty cycle of the signal, and the duty cycle is determined by the application software.

  • Page 44: Low-Side Outputs With Current Sense Configuration

    2.9 V; therefore, the actual usable voltage range from the amplifier is only 0 V to 2.8 V. The following table provides specifications for the VMM3120's low-side outputs: Low-Side Output Specifications Item...
  • Page 45 Outputs You should use as much filtering as possible on the low-side output's current measurement to prevent anomalous analog readings in noisy environments. The amount of filtering (cut-off frequency) for your hardware filter will depend on the rate at which the current changes, as well as the expected response time of your system.

  • Page 46: Low-Side Outputs With Current Sense Installation Connections

    Figure 17: Typical low-side output connection 4.2.3.1. Low-Side Output De-Rating Requirements Each low-side output is rated to continuously drive 2.5 A of current; however, in some applications, the rating for low-side outputs must be reduced, or de-rated to less than 2.5 A. VMM3120...

  • Page 47: Low-Side Outputs With Current Sense Diagnostics

    Power dissipation You must determine how much power is dissipated by each output. The total allowable power dissipation inside the VMM3120 must be less than 7 W, which will eliminate the need for additional heat sinking. Most of the power dissipation comes from the output drivers.
  • Page 48 4.2.4.2. Open Load Open load faults occur when a low-side output pin is open circuit (not connected to a load). The use of this feature operates is defined in the VMM3120 Platform Framework API document distributed with the SDK. Note: Low-side outputs must be on to detect an open-load fault.

  • Page 49: Power

    Power 5. Power The VMM3120 is powered by the vehicle battery. The VMM3120 operates in a 12 V or 24 V system, and can operate from 6 V up to 32 V, with over-voltage protection at 36 V. The various pins on the connectors are used for different types of power, as detailed in the following sections.

  • Page 50: Logic And Output Power Connections

    The VMM3120 is protected against reverse-battery connections by an internal high-current conduction path that goes from ground to power. To protect the VMM3120 from damage in a reverse-battery condition, place a fuse of 50 A or less in series with the power wires in the application harness.

  • Page 51: Sensor Supply

    5 V or 8 V. It is a switching regulator that supplies a high output current that does not have to be de-rated when used on 24V systems. Note: The voltage provided to the VMM3120 must be 7 V or greater to ensure that the SENSOR_SUPPLY can provide 5 V.
  • Page 52 Power The following table provides specifications for the VMM3120's sensor power output: Sensor Power Specifications Item UNIT Input voltage range (5 V output) Input voltage range (8 V output) Over-voltage Output voltage range (5 V) 4.74 5.02 5.30 Output voltage range (8 V) 7.63...

  • Page 53: Communication

    Wake on CAN provides a low-current sleep mode that turns on the VMM3120 when a CAN message is received by the module. It is not possible to filter messages that are used to turn on the VMM3120 using Wake on CAN. For this reason, any message will turn on the VMM3120. The application software must be written to determine how the VMM3120 will behave when it is turned on.

  • Page 54: J1939 Can Configuration

    6.1.2. J1939 CAN Configuration There are two features associated to CAN communication that are configured:  Wake on CAN - the VMM3120 will turn on when a CAN message is received.  Internal CAN Termination Resistor - the VMM3120 does not have a 120 Ω...
  • Page 55 Communication Shield should be connected to an available ground terminal attached to the negative battery. The CAN cable must have an impedance of 120 Ω.  The CAN cable is very susceptible to system noise; therefore, CAN shield must be connected as follows: a.

  • Page 56: Connectors

    White (J2): AMP 776164-2 Both connectors have pins that connect to inputs, outputs, and communication channels used by the VMM3120. They also have keying that prevents you from incorrectly mating the connectors to the vehicle harness. The vehicle harness should be designed to interface with both connectors.

  • Page 57: Mating Connector Part Numbers

    Connectors 7.1. Mating Connector Part Numbers The maximum wire gage usable in the VMM3120 connectors is 16 AWG with GXL insulation. The following table shows the part numbers for the mating connectors and terminals that are used in the vehicle harness:...
  • Page 58 OUTPUT8_2A5_HS High-side output SENSOR_SUPPLY (+5Vdc) Sensor voltage output INPUT31_F Frequency input INPUT30_F Frequency input INPUT22_A Amplified analog input INPUT7_D Digital input CAN1_L Controller Area Network Low signal CAN1_H Controller Area Network High signal OUTPUT17_2A5_LS Low-side output with current sense VMM3120...
  • Page 59 Connectors J2 Connector (White) Pinout Name Function OUTPUT20_2A5_LS Low-side output w/ current sense INPUT12_D Digital input INPUT15_D Digital input OUTPUT16_2A5_HS High-side output OUTPUT15_2A5_HS High-side output OUTPUT14_2A5_HS High-side output OUTPUT13_2A5_HS High-side output OUTPUT12_2A5_HS High-side output OUTPUT11_2A5_HS High-side output OUTPUT10_2A5_HS High-side output OUTPUT9_2A5_HS High-side output OUTPUT2_2A5_HS...

  • Page 60: Installation

    Note: The VMM3120 has not been tested for water ingress according to the EP455 level 1 standard. The VMM3120 is protected from aggressive pressure wash up to 1000 psi at 1 m (3.28 ft.). Warning! Damage to equipment. Exercise caution when pressure- washing the VMM3120.

  • Page 61: Designing And Connecting The Vehicle Harness

    Busbar power, if applicable, 14 AWG per 20 A of current (or 8 AWG per 40 A of current for single pin busbar connectors) Once the vehicle harness is designed, it can be connected to the VMM3120 simply by clicking the mating connector into the connector port on the VMM3120.

  • Page 62: Dimensions

    Figure 22: Dimensions 8.3.2. Selecting a Mounting Location The VMM3120 can be installed in the vehicle's cab or on the chassis. If used in a marine application, ensure that it is protected from excessive salt spray. Before mounting the VMM3120, review the following environmental and mechanical requirements.

  • Page 63: Mounting The Vmm3120 To A Vehicle

    The following guidelines are related to physically attaching the VMM3120 to a vehicle:  Secure the VMM3120 with bolts in all bolt holes using Hex Head 1/4"-20 or equivalent metric size (6 mm) bolts.  The bolts should be tightened according to the fastener manufacturer's tightening torque specifications.

  • Page 64: Application Examples

    Application Examples 9. Application Examples The purpose of this section is to provide examples of how the VMM3120 can be used for different purposes. The following examples (used for illustrative purposes only) are covered in this section:  Implementing safety interlocks ...

  • Page 65: Controlling Indicator Lights

    Digital Input Figure 24: Seat switch interlock connection 9.2. Controlling Indicator Lights Multiple VMM3120 can be used together in a system to control a vehicle's indicator lights. For example, you could connect three VMM3120s, communicating over the CAN bus, as follows.: ...

  • Page 66: Controlling A Proportional Valve

    Front Left Signal Light Figure 25: Indicator light connections 9.3. Controlling a Proportional Valve The VMM3120 can be used to control a proportional hydraulic valve through a high-side output with PWM capability, and a low-side output with current sense. Note:...
  • Page 67 Application Examples software. Refer to the appropriate software manual, or contact your Parker Vansco Account Representative for more details about software. This section only provides hardware connection information. When making the connection, it is highly recommended to use the high-side and low-side outputs in pairs to avoid potential problems.

  • Page 68: Controlling Motor Speed

    Application Examples 9.4. Controlling Motor Speed The VMM3120 can be used to control the DC motor speed of motors that provide a tachometer output. Note: The VMM3120 has Proportional Integral Differential (PID) capabilities that make it possible to control devices like proportional valves through software.

  • Page 69: Using One Analog Input As Two Digital Inputs

    9.5. Using one Analog Input as Two Digital Inputs The VMM3120 allows you to use one analog input as two digital inputs, which is useful in reducing harness lead or if you are running out of digital inputs in your system.

  • Page 70: Controlling A Linear Actuator

    Application Examples 9.6. Controlling a Linear Actuator The VMM3120 can control the position of a linear actuator by using two h- bridges of high-side and low-side outputs, and monitor the position of the actuator using an analog input. When making the connections, it is highly recommended to use the high-side and low-side outputs in pairs to avoid potential problems (use high-side output 1 with low-side output 1, etc.).

  • Page 71: Connecting Various Sensors

    Application Examples 9.7. Connecting Various Sensors There are many types of sensors that can be connected to the VMM3120, as follows:  Open collector sensors  Variable resistance sensors  Variable reluctance sensors  Switch sensors  Voltage sensors ...
  • Page 72 Digital or frequency Input Open collector Figure 30: Open collector sensor connection The following shows a typical PNP open collector (also called open emitter) sensor connection: Internal to product Open collector Digital or frequency Input Figure 31: Open collector active high connection VMM3120...

  • Page 73: Variable Resistance

    They work by changing the voltage reading on the sensor according to changes in pressure or temperature in the application. The VMM3120 cannot measure resistance directly. To make the VMM3120 measure resistance accurately, do the following:  Include a precision pull-up resistor between the sensor and the sensor power...

  • Page 74: Variable Reluctance

    Active-high sensor switches are another common type which are generally safer. To use active-high switches, the internal pull-down resistor for the input that the sensor is wired to must be enabled. VMM3120...

  • Page 75: Voltage

    Application Examples The following shows a typical sensor switch connection: Internal to product Battery voltage Switch Digital Input Figure 34: Switch sensor connection 9.7.5. Voltage Voltage type sensors work by driving an analog voltage signal to report the sensor's measured value. Voltage sensors are compatible with analog inputs, and are typically used in applications that require variable voltage measurements.

  • Page 76: Cmos

    CMOS sensors can be wired directly to digital and frequency inputs. The following shows a typical CMOS sensor connection: Internal to product CMOS Digital or Frequency Input Figure 36: CMOS sensor connection VMM3120...

  • Page 77: Potentiometer (Ratiometric)

     Connect one end of the sensor to the SENSOR_SUPPLY pin, and the other end to pin on the VMM3120.  Connect the sensor signal to an analog input. The following shows a typical potentiometer sensor connection: Internal to product...

  • Page 78: Startup

    4. Verify that the emergency stop works by ensuring that it does either of the following:  disconnects the supply voltage to all modules  shuts off the diesel engine or a dump valve, thereby depressurizing the hydraulic system Module Dump Valve Figure 38: Emergency stop VMM3120...
  • Page 79 Startup Prepare for system start Danger! Risk of injury. Make sure no one is in dangerous proximity to the vehicle. Prepare for the initial system start as follows: 1. Ensure that the engine for the hydraulic system's pump is in the off position. 2.

  • Page 80: Tests

    Random Vibration Section 4.9.4.2 J1455 (Aug 94) Swept Sine Vibration Appendix A J1455 (Aug 94) Operational Shock Section 4.10.3.4 J1455 (Aug 94) Handling Drop Section 4.10.3.1 J1455 (Aug 94) Harness Shock Section 4.10.3.3 J1455 (Aug 94) Operating Voltage Section 4.11.1.1/4.11.1.2 VMM3120...
  • Page 81 Tests J1455 (Aug 94) Operational Power-Up Section 5.10.7 J1455 (Aug 94) Jumper Start Voltage Section 4.11.1.2 J1455 (Aug 94) Steady State Reverse Voltage Section 4.11.1.2 EP455 (Feb 03) Short Circuit Protection Section 5.10.4 EP455 (Feb 03) Transient Accessory Noise Section 5.11.1 EP455 (Feb 03) Transient Alternator Field Decay Section 5.11.2...
  • Page 82 Actual enclosure size: Equipment limitations minimum distance from 3.05x3.05 absorber:1m Biconical Antenna width: 1.35m Log periodic antenna length: 75cm C=250pF C=330pF Harsher test UUT positioned on a UUT positioned on a piece ISO 10605 requirement static dissipative mat of dielectric foam VMM3120...

  • Page 83: Glossary

    12. Glossary AC-coupled A circuit that eliminates the DC offset voltage of the signal. This circuit is typically used with frequency inputs that have a DC offset. Note that the DC offset value varies by product. active high Input type that is on when it reads a battery voltage level, and off when it is floating or grounded.
  • Page 84 This circuit is typically connected to an analog input that is connected to the microprocessor. Also known as current sense or current sensing. current feedback control Varying the duty cycle of an output so that the output provides a desired amount of current to the load. VMM3120...
  • Page 85 Glossary current sensor A device that detects electrical current in a wire and generates a signal proportional to it. data link adaptor (DLA) A development tool that connects the CAN bus to a personal computer (through a USB or RS232 port), so that programming and diagnostics can be performed on the product before installing it in a vehicle.
  • Page 86 Any component that draws current from a module and is typically switched on and off with outputs. Examples include bulbs, solenoids, motors, etc. logic power Power pins for the microprocessor and logic peripherals. VMM3120...
  • Page 87 A mechanical drawing showing the dimensions, pinouts, and implemented configuration options for a Parker Vansco product. proportional-integral-differential (PID) controller A system or device controller that, through constant feedback about differences between the desired state and the current state, adjusts inputs accordingly. An example of such a controller is one that prevents a vehicle from traveling faster than a specified speed, regardless of the amount of pressure on the gas pedal.
  • Page 88 The minimum current needed to flow through a mechanical switch to break through any film of oxidation that may be on the switch contacts. VMM3120...
  • Page 89 Glossary User Guide...

  • Page 90: Index

    • 76 CAN shield • 74 Frequency Inputs • 21 CMOS • 66, 74 Communication • 43 Connect the VMM3120 multiplexing module to a gain • 76 Development System • 7 Gather Required Materials • 5 Connecting Various Sensors • 61 General safety regulations •...
  • Page 91 Mating Connector Part Numbers • 47 trip time • 78 Mechanical Installation Guidelines • 51 Mechanical Requirements • 52 Mounting the VMM3120 to a Vehicle • 53 Using one Analog Input as Two Digital Inputs • 59 Nyquist criterion • 77 Variable Reluctance • 64 Variable Resistance •...
  • Page 92 Vansco Multiplexing Module VMM3120 User Guide HY33-5004-IB/US...

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