Woodward SECM112 User manual

EC-US-L1

Product Manual 26634

(Revision C, 03/2022)

Original Instructions

SECM112 Digital Control

Vehicular Applications

Hardware Only

Installation Manual

EC-US-L1

General

Precautions

Read this entire manual and all other publications pertaining to the work to be

performed before installing, operating, or servicing this equipment.

Practice all plant and safety instructions and precautions.

Failure to follow instructions can cause personal injury and/or property damage.

Revisions

This publication may have been revised or updated since this copy was produced.

To verify that you have the latest revision, check manual 26455, Customer

Publication Cross Reference and Revision Status & Distribution Restrictions, on

the publications page of the Woodward website:

http://www.woodward.com

The latest version of most publications is available on the publications page. If

your publication is not there, please contact your customer service representative

to get the latest copy.

Proper Use

Any unauthorized modifications to or use of this equipment outside its specified

mechanical, electrical, or other operating limits may cause personal injury and/or

property damage, including damage to the equipment. Any such unauthorized

modifications: (i) constitute "misuse" and/or "negligence" within the meaning of

the product warranty thereby excluding warranty coverage for any resulting

damage, and (ii) invalidate product certifications or listings.

Translated

Publications

If the cover of this publication states "Translation of the Original Instructions"

please note:

The original source of this publication may have been updated since this

translation was made. Be sure to check manual 26455, Customer Publication

Cross Reference and Revision Status & Distribution Restrictions, to verify whether

this translation is up to date. Out-of-date translations are marked with . Always

compare with the original for technical specifications and for proper and safe

installation and operation procedures.

Revisions—A bold, black line alongside the text identifies changes in this publication since the

last revision.

Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is

believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly

undertaken. Manual 26634

Manual 26634 SECM112 Digital Control

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Contents

WARNINGS AND NOTICES ...............................................................................................................3

REGULATORY COMPLIANCE............................................................................................................5

ELECTROSTATIC DISCHARGE AWARENESS......................................................................................6

CHAPTER 1. GENERAL INFORMATION..............................................................................................7

Introduction ...................................................................................................................................................7

Environmental Requirements........................................................................................................................7

CHAPTER 2. SECM112 INSTALLATION............................................................................................9

Mounting........................................................................................................................................................9

CHAPTER 3PRODUCT SUPPORT AND SERVICE OPTIONS ...............................................................15

Product Support Options.............................................................................................................................15

Product Service Options .............................................................................................................................15

Returning Equipment for Repair .................................................................................................................16

Replacement Parts......................................................................................................................................16

Engineering Services..................................................................................................................................17

Contacting Woodward’s Support Organization...........................................................................................17

Technical Assistance ..................................................................................................................................18

REVISION HISTORY .......................................................................................................................19

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Illustrations and Tables

Figure 1-1. Location of Accelerometer to Measure Mounting Vibration .......................................................8

Figure 1-2. Random Vibration Spectrum ......................................................................................................8

Figure 2-1. SECM112 Isolators.....................................................................................................................9

Figure 2-2. SECM112 Outline.....................................................................................................................10

Figure 2-3. Preferred SECM112 Mounting Orientations.............................................................................11

Figure 2-4. Acceptable SECM112 Mounting Orientations..........................................................................11

Figure 2-5. Not Recommended SECM112 Mounting Orientations.............................................................11

Figure 2-6. Harness Clearance...................................................................................................................12

Figure 2-7. SECM Connector Orientations.................................................................................................12

Figure 2-8. Connector Physical Pinout .......................................................................................................13

Table 1-1. SECM112 Part Numbers.............................................................................................................7

Table 2-1. Connector System Part Numbers..............................................................................................13

Table 2-2. Connector Kit.............................................................................................................................14

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Warnings and Notices

Important Definitions

This is the safety alert symbol used to alert you to potential personal injury hazards. Obey all

safety messages that follow this symbol to avoid possible injury or death.

•DANGER - Indicates a hazardous situation, which if not avoided, will result in death or serious injury.

•WARNING - Indicates a hazardous situation, which if not avoided, could result in death or serious

injury.

•CAUTION - Indicates a hazardous situation, which if not avoided, could result in minor or moderate

injury.

•NOTICE - Indicates a hazard that could result in property damage only (including damage to the

control).

•IMPORTANT - Designates an operating tip or maintenance suggestion.

Lockout/Tagout

Ensure that personnel are fully trained on LOTO procedures prior to

attempting to replace or service equipment on a “live” running

engine. All safety protective systems (overspeed, over temperature,

overpressure, etc.) must be in proper operational condition prior to

the start or operation of a running engine. Personnel should be

equipped with appropriate personal protective equipment to

minimize the potential for injury due to release of hot hydraulic

fluids, exposure to hot surfaces and/or moving parts, or any moving

parts that may be activated and are located in the area of control of

the equipment.

Overspeed /

Overtemperature /

Overpressure

The engine, turbine, or other type of prime mover should be

equipped with an overspeed shutdown device to protect against

runaway or damage to the prime mover with possible personal injury,

loss of life, or property damage.

The overspeed shutdown device must be totally independent of the

prime mover control system. An overtemperature or overpressure

shutdown device may also be needed for safety, as appropriate.

Personal Protective

Equipment

The products described in this publication may present risks that

could lead to personal injury, loss of life, or property damage.

Always wear the appropriate personal protective equipment (PPE) for

the job at hand. Equipment that should be considered includes but is

not limited to:

•Eye Protection

•Hearing Protection

•Hard Hat

•Gloves

•Safety Boots

•Respirator

Always read the proper Material Safety Data Sheet (MSDS) for any

working fluid(s) and comply with recommended safety equipment.

Start-up

Be prepared to make an emergency shutdown when starting the

engine, turbine, or other type of prime mover, to protect against

runaway or overspeed with possible personal injury, loss of life, or

property damage.

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Automotive

Applications

On- and Off-Highway Mobile Applications: Unless Woodward's

control functions as the supervisory control, customer should install

a system totally independent of the prime mover control system that

monitors for supervisory control of engine (and takes appropriate

action if supervisory control is lost) to protect against loss of engine

control with possible personal injury, loss of life, or property

damage.

IOLOCK

IOLOCK: driving I/O into a known state condition. When a control

fails to have all the conditions for normal operation, watchdog logic

drives it into an IOLOCK condition where all output circuits and

signals will default to their de-energized state as described below.

The system MUST be applied such that IOLOCK and power OFF

states will result in a SAFE condition of the controlled device.

•Microprocessor failures will send the module into an IOLOCK

state.

•Discrete outputs / relay drivers will be non-active and

de-energized.

•Analog and actuator outputs will be non-active and de-energized

with zero voltage or zero current.

Network connections like CAN stay active during IOLOCK. This is up

to the application to drive actuators controlled over network into a

safe state.

The IOLOCK state is asserted under various conditions, including:

•Watchdog detected failures

•Microprocessor failure

•PowerUp and PowerDown conditions

•System reset and hardware/software initialization

•PC tool initiated

NOTE—Additional watchdog details and any exceptions to these

failure states are specified in the related section of the product

manual.

Battery Charging

Device

To prevent damage to a control system that uses an alternator or

battery-charging device, make sure the charging device is turned off

before disconnecting the battery from the system.

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Regulatory Compliance

International Compliance

UNECE Type approved to UNECE Regulations 10, 67, and 110.

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Electrostatic Discharge Awareness

Electrostatic

Precautions

Electronic controls contain static-sensitive parts. Observe the

following precautions to prevent damage to these parts:

•Discharge body static before handling the control (with power to

the control turned off, contact a grounded surface and maintain

contact while handling the control).

•Avoid all plastic, vinyl, and Styrofoam (except antistatic

versions) around printed circuit boards.

•Do not touch the components or conductors on a printed circuit

board with your hands or with conductive devices.

To prevent damage to electronic components caused by improper

handling, read and observe the precautions in Woodward manual

82715, Guide for Handling and Protection of Electronic Controls,

Printed Circuit Boards, and Modules.

Follow these precautions when working with or near the control.

1. Avoid the build-up of static electricity on your body by not wearing clothing made of synthetic

materials. Wear cotton or cotton-blend materials as much as possible because these do not store

static electric charges as much as synthetics.

2. Touch your finger to a grounded surface to discharge any potential before touching the LECM or

installing cabling connectors. Alternatively, ESD mitigation may be used as well: ESD smocks, ankle

or wrist straps and discharging to a reference grounds surface like chassis or earth are examples of

ESD mitigation.

•ESD build up can be substantial in some environments: the unit has been designed for

immunity deemed to be satisfactory for most environments. ESD levels are extremely

variable and, in some situations, may exceed the level of robustness designed into the

control. Follow all ESD precautions when handling the unit.

oI/O pins within connectors have had ESD testing to a significant level of immunity to

ESD, however do not touch these pins if it can be avoided.

▪Discharge yourself after picking up the cable harness before installing it as a

precaution.

oThe unit is capable of not being damaged or improper operation when installed to a

level of ESD immunity for most installation as described in the specifications.

Mitigation is needed beyond these specifications.

External wiring connections for reverse-acting controls are identical

to those for direct-acting controls.

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Chapter 1.

General Information

Introduction

Scope

The intent of this document is to detail the installation requirements of the 112-pin Small Engine Control

Module (SECM112). This module was previously referred to as ECM-OH (On-Highway). Active SECM112

part numbers are listed in Table 1-1.

Table 1-1. SECM112 Part Numbers

Module

Description

SECM112 MY12

1751-6601

MODULE - ECM-OH-01C OH6 CALIBRATIBLE CONTROL MODULE (MPC5644)

1751-6605

MODULE - ECM-OH-01 OH6 PRODUCTION CONTROL MODULE (MPC5642)

1751-6605-XX

MODULE - ECM-OH-01 OH6 PRODUCTION CONTROL MODULE (MPC5642)

1751-6605-XXX

MODULE - ECM-OH-01 OH6 PRODUCTION CONTROL MODULE (MPC5642)

SECM112 MY18

1751-6812

MODULE - SECM112 6-IGBT & 6-INJ PRODUCTION

1751-6813

MODULE - SECM112 6-IGBT, H3 & NO INJ. PRODUCTION

1751-6814

MODULE - SECM112 6-IGBT, H3 & 4-INJ PRODUCTION

1751-6815

MODULE - SECM112 6-IGBT & 6-INJ CALIBRATION

1751-6816

MODULE - SECM112 6-IGBT, H3 & NO INJECTORS CALIBRATION

1751-6817

MODULE - SECM112 6-IGBT, H3 & 4-INJ CALIBRATION

SECM112 MY20

1751-6852

MODULE –SECM112 6-IGBT, H3 & NO INJ, AN34-37 (MPC5644)

1751-6854

MODULE –SECM112 6-IGBT, 6-INJ, AN34-37 (MPC5644)

1751-6862*

MODULE - SECM112 6-IGBT & 6-INJ, AN34-37 CUSTOM, CAL (MY20)

1751-6863*

MODULE - SECM112 6-IGBT, H3 & 4-INJ, AN34-37, CUSTOM, CAL (MY20)

1751-6864*

MODULE - SECM112 6-IGBT, H3 & NO INJECTORS, AN34-37, CAL, NO CAN3

TERM (MY20)

XX and XXX –Alpha characters designated for specific customer’s application

(*) MY20 Customer specific part numbers

Overview

The SECM112 is a full-authority engine control module capable of withstanding the environment within

the engine compartment and either on- or off-engine mounting. The 4 mounting feet on the controller

were designed to accept specific rubber grommets and aluminum bushings to provide both vibration

isolation and electrical isolation of the module case from chassis ground. This mounting hardware is pre-

installed on the part numbers listed above.

Environmental Requirements

Vibration and Shock

The SECM112 is designed for engine mount operation with the vibration isolators. If the SECM112 is

mounted on a bracket not provided by Woodward, the bracket needs to be evaluated in the application. It

is possible for a bracket resonance to be incompatible with the SECM112 product, causing premature

failure of the module.

The vibration integrity of the SECM112 for a given installation can be verified by measuring the vibration

spectrum of an installed unit when the engine / vehicle is operated under worst-case vibration conditions.

Manual 26634 SECM112 Digital Control

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The vibration spectrum needs to be measured with an accelerometer on the SECM112 mounting foot as

shown in Figure 1-1. If the measured spectrum is within the RV3 de-rated spectrum illustrated in red in

Figure 1-2, the mounting location is acceptable for vibration.

Figure 1-1. Location of Accelerometer to Measure Mounting Vibration

The harness must be firmly secured at a tie-down length not to exceed 150 mm from the center of the

connectors.

Random Vibration

The SECM112 shall survive Woodward’s RV3 random vibration specification (22.1 Grms / 3 hours per

axis) per Woodward procedure 3-04-6231. The RV3 random vibration profile is illustrated in Figure 1-2

(blue line). A de-rated installation RV3 vibration for an estimated 7-year life is shown in red.

Figure 1-2. Random Vibration Spectrum

Temperature

The SECM112 is designed to be thermally isolated from the mounting surface and relies on air

convection for cooling based on a minimum air flow at the worst-case operation mode. The following

ratings apply to the SECM112 when installed properly:

•Ambient Operating Temperature: –40 °C to +105 °C

•Minimum Operating Airflow: 2 m/s

•Heat Soak Maximum Temperature: +125 °C

Customers can verify the temperature in the desired mounting location by placing a thermocouple in the

air near the operating SECM112. If the external ambient conditions are not worst-case, this needs to be

taken into consideration when measuring the SECM112 package temperature. If the measured air

temperature when operating at worst-case (fastest) engine speed and worst-case (hottest) ambient

conditions is less than 105 °C, the mounting location thermal stress is acceptable for the SECM112.

Accelerometer location

0.001

0.01

0.1

100

1000

10000

Frequency (Hz)

PSD (G^2 / Hz)

Validation Spectrum

Installation Spectrum –

7 Year Life

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