Murphy Xpansion IX3212 Reference Manual
Intelligent Xpansion Series
IX3212 PDM Reference Manual
00-02-0829
2018-02-26
Section 80
Please read the following information before installing.
BEFORE BEGINNING USE OF THIS PRODUCT:
Read and follow all instructions.
Please contact Enovation Controls immediately if you have any
questions.
CONTENTS
1 INTRODUCTION .......................................................................................................................................................... 3
1.1 OVERVIEW ........................................................................................................................................................................ 3
1.2 DESCRIPTION ..................................................................................................................................................................... 5
1.3 NOTATION CONVENTIONS USED IN THE MANUAL ..................................................................................................................... 6
2 INSTALLATION ............................................................................................................................................................ 7
2.1 MOUNTING ORIENTATION ................................................................................................................................................... 7
2.2 DIMENSIONS ..................................................................................................................................................................... 8
2.3 CIRCUIT PROTECTION .......................................................................................................................................................... 9
2.4 RECOMMENDED WIRING PRACTICES ...................................................................................................................................... 9
3 ELECTRICAL CONNECTIONS ....................................................................................................................................... 11
3.1 CONNECTORS J1 AND J2 .................................................................................................................................................... 11
3.2 CONNECTOR J3 ................................................................................................................................................................ 12
3.3 CONNECTOR J4 ................................................................................................................................................................ 13
3.4 CONNECTOR J5 ................................................................................................................................................................ 14
3.5 CONNECTOR J6 ................................................................................................................................................................ 15
4 COMMUNICATION .................................................................................................................................................... 16
4.1 OVERVIEW ...................................................................................................................................................................... 16
4.1.1 Source Address ................................................................................................................................................... 16
4.1.2 Loss of Communication ...................................................................................................................................... 16
4.1.3 Output Modes .................................................................................................................................................... 17
4.1.4 Special Methods of Operation ............................................................................................................................ 17
4.1.4.1 Power on Reset (POR) ................................................................................................................................................ 17
4.1.4.2 Local Source Control .................................................................................................................................................. 17
4.2 NAMING AND NUMBERING CONVENTIONS ............................................................................................................................ 18
4.3 CONFIGURING .................................................................................................................................................................. 20
4.3.1 Configure Output Function ................................................................................................................................. 21
4.3.1.1 Configuration Identifier ............................................................................................................................................. 22
4.3.1.2 Output Channel.......................................................................................................................................................... 22
4.3.1.3 Soft-Start Step Size .................................................................................................................................................... 22
4.3.1.4 Motor/Lamp Mode .................................................................................................................................................... 24
4.3.1.5 Loss of Communication .............................................................................................................................................. 25
4.3.1.6 POR Command ........................................................................................................................................................... 26
4.3.1.7 POR Enable ................................................................................................................................................................ 27
4.3.1.8 Command Type .......................................................................................................................................................... 27
4.3.1.9 Motor Braking ............................................................................................................................................................ 28
4.3.1.10 LSC Digital Input ......................................................................................................................................................... 28
4.3.1.11 Calibration Time ......................................................................................................................................................... 28
4.3.1.12 Response .................................................................................................................................................................... 29
4.3.2 Configure Output Channels ................................................................................................................................ 30
4.3.2.1 Output Channel Group Identifier ............................................................................................................................... 31
4.3.2.2 Current Limit .............................................................................................................................................................. 31
4.3.2.3 Feedback Type ........................................................................................................................................................... 32
4.3.2.4 Automatic Reset ........................................................................................................................................................ 32
4.3.2.5 High-Side or H-Bridge ................................................................................................................................................ 33
4.4 COMMANDING ................................................................................................................................................................ 34
4.4.1 Command Output Channels ............................................................................................................................... 35
4.4.1.1 Output Command Identifier ...................................................................................................................................... 36
4.4.1.2 Command .................................................................................................................................................................. 36
4.4.1.3 Enable ........................................................................................................................................................................ 37
4.4.1.4 Module Transmit Rate ............................................................................................................................................... 37
4.5 FEEDBACK AND DIAGNOSTICS .............................................................................................................................................. 38
4.5.1 Analog Inputs 1-2, Digital Feedback .................................................................................................................. 39
4.5.1.1 Feedback and Diagnostics Identifier .......................................................................................................................... 40
4.5.1.2 Digital Inputs .............................................................................................................................................................. 40
4.5.1.3 Analog Inputs ............................................................................................................................................................. 41
4.5.2 Analog Inputs 3-4, Output Diagnostics .............................................................................................................. 42
4.5.2.1 Output Diagnostic ...................................................................................................................................................... 43
4.5.3 Analog Inputs 5-6, Battery and Sensor Supply ................................................................................................... 44
4.5.3.1 Sensor Supply Low ..................................................................................................................................................... 45
4.5.3.2 Sensor Supply High .................................................................................................................................................... 45
4.5.3.3 Battery Voltage .......................................................................................................................................................... 45
4.5.4 Analog Inputs 7-8, Software Version and Power Supply .................................................................................... 46
4.5.4.1 Total Current Status ................................................................................................................................................... 47
4.5.4.2 Power Supply Status .................................................................................................................................................. 47
4.5.4.3 Software Version ....................................................................................................................................................... 47
4.5.5 Output Feedback ................................................................................................................................................ 48
4.5.5.1 Current, Power, Position or Rate Feedback ............................................................................................................... 49
4.5.6 Output Function Handshake .............................................................................................................................. 50
4.5.7 Output Configuration Handshake ...................................................................................................................... 51
4.6 EXAMPLE MESSAGES ......................................................................................................................................................... 53
4.6.1 Arbitration Field ................................................................................................................................................. 53
4.7 EXAMPLE PSEUDO CODE .................................................................................................................................................... 54
4.7.1 Configure and Verify Outputs............................................................................................................................. 54
4.7.2 Command Outputs ............................................................................................................................................. 54
4.7.3 Read Diagnostics ................................................................................................................................................ 54
5 TROUBLESHOOTING ................................................................................................................................................. 55
5.1 OUTPUT DOES NOT RESPOND ............................................................................................................................................. 55
5.2 PDM DOES NOT FUNCTION ............................................................................................................................................... 55
6 SPECIFICATIONS........................................................................................................................................................ 56
7 CONDENSED MESSAGE DEFINITION .......................................................................................................................... 58
1 Introduction
1.1 Overview
Murphy’s Intelligent Xpansion™ Power Distribution Module (PDM) expands CAN bus networks
and replaces existing fuse and relay boxes with more reliable, solid-state switches that can
directly drive lights, cooling fans, wiper motors and directional DC motors.
Each of the 12 PDM outputs can switch or proportionally drive 15A loads and feature built-in
over-current detection and shutdown capability. Outputs can be paired to run up to six electric
motors with H-bridge direction control.
Twelve digital inputs monitor switched battery, ground and floating inputs. Additionally, eight
analog inputs are available with a 5V sensor supply.
Wiring length is reduced and costs are cut by remotely locating the PDM module near signals
and loads. Then the I/O is multiplexed using a CAN bus network, which allows engineers to
greatly simplify harness design for ease of installation and improved reliability.
For applications not requiring a CAN bus, the inputs can directly trigger outputs so there is no
need for a separate microcontroller.
The enclosure is fully sealed and potted to withstand wash-down and dust.
The unit is compact and can be mounted nearly anywhere on a vehicle.
The PDM is an advanced CAN-based I/O module with built-in fault detection for directly driving
high current loads such as work lights, DC motors and actuators, wiper motors and many other
loads. It allows for the flexible I/O extension of CAN bus systems using the SAE J1939
protocol or stand-alone operation replacing traditional switch-activated fuse and relay boxes.
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The PDM features a compact, composite polymer aluminum housing and can operate in either
12V or 24V systems. The solid construction and compact enclosure facilitate mounting
anywhere on the vehicle.
The PDM provides a novel alternative to current relay/fuse-based solutions. The PDM is potted
and has no mechanical parts. It eliminates relays and fuses on the outputs so outputs can be
switched ON/OFF or driven proportionally. Output status can be monitored for improved
diagnostics, while analog and digital input devices are easily connected and their signals
accessed via CAN messages.
The PDM is fully sealed and uses field-proven Deutsch connectors for superior performance in
the most adverse environments. In addition, the 12 fully protected solid-state outputs have the
capacity to handle high current loads.
The compact housing design simplifies mounting in tight areas and eases harness installation
through reduced wiring. An innovative I/O structure that can be monitored and configured
remotely allows for quick adaptation in numerous mobile applications.
This robust unit is intended for use in conditions where reliable operation is crucial, extreme
temperature variations are common, high shock and vibration levels exist and electromagnetic
interference (EMI) is normal.
The PDM is designed for mobile equipment use and is configurable using the SAE J1939
Group A Proprietary message construct.
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1.2 Description
The IX3212 PDM is a robust, compact, fully encapsulated unit and is designed for off-highway
mobile equipment and other industrial applications.
It features 12 tri-state digital inputs, eight analog inputs and 12 high-current (15 A) high-side
outputs. The unit also features a fully protected 5V sensor supply capable of driving 70 mA.
The 12 high-current outputs can be configured as H-Bridge pairs. The outputs also can be
configured for pulse-width-modulated (PWM) operation. Outputs 1 to 6 feature a 500 Hz PWM
frequency with better than 1 percent duty cycle resolution; these can be used to proportionally
drive outputs. Outputs 7 to 12 offer 100 Hz PWM frequency with 10 percent duty cycle
resolution. These outputs are best suited for applications where it is acceptable for output
levels to increase in incremental steps or with a defined ramp rate.
Each output channel incorporates output-overload-shutdown configurable in 2.5A increments,
diagnostic indication of short circuit, overload (based on shutdown value) and open circuit. An
indication is given when the entire module has total current overload. The regulated 5-volt
output is monitored and two bits indicate diagnostic status for an overload, short circuit or
short-to-supply.
The PDM uses CAN messages to receive configuration and control messages as well as send
feedback and diagnostics using J1939 Proprietary Group A constructs.
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1.3 Notation Conventions Used in the Manual
This document features Adobe Reader bookmarks to quickly jump between sections.
Additionally, blue-colored hyperlinks are used throughout the manual to allow easy navigation
between the various CAN messages.
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2 Installation
2.1 Mounting Orientation
The PDM should be mounted on a vertical surface with either J3 – J6 facing down or to the
right. Secure the module with either 6 mm or 1/4 in. diameter fasteners.
IMPORTANT: The harness should have a drip loop(s) to allow water
to run off the wires.
IX3212 PDM shown in preferred mounting orientations
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2.2 Dimensions
IX3212 PDM Dimensions
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2.3 Circuit Protection
A fuse or circuit break on the positive power input (connector J2) is required and should be
located near the power source (e.g. battery).
The outputs are monitored for over-current conditions and turn-off in the event of the fault. For
information on how to configure the output current limit, refer to Section 4.3.2 – Configure
Output Channels.
2.4 Recommended Wiring Practices
This section contains information about the IX3212 connectors and pin outs. Please use the
following recommended wiring practices when installing and using the PDM:
• Ensure correct and adequate single point ground to prevent ground loops.
• Use twisted or twisted shielded pair cable for the CAN bus per the applicable standard.
• Ensure the appropriate sized conductor is specified for the intended load current in the
harness design for the particular application.
o SAE J1614 specifies requirements and design guidelines for electrical wiring
systems of less than 50 V and cable diameters from 0.35 mm2 to 19 mm2 used
on off-road, self-propelled earthmoving machines as defined in SAE J1116 and
agricultural tractors as defined in ASAE S390.
o SAE J2202 recommends and describes the application of the primary wiring
distribution system of less than 50 V and includes wire sizes 0.5 mm2 to 19 mm2
on heavy-duty on-highway trucks.
o SAE J1128, ISO 6722 and JASO D608-92 automotive wiring standards aid in
determining the recommended conductor sizing table for the respective 12V or
24V system that is powering the load.
o ABA specifies a marine wiring standard that differs from SAE J1128.
• Wire gauges should be capable of handling at least 135 percent of the circuit’s current
protection rating.
o Determine the maximum load the wire is expected to carry, the location of wiring
(e.g. in a cab or engine compartment) and ambient temperature).
o Determine the length of the wire needed to extend from the power source to the
load. Include the ground wire length if used.
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o Insure that the voltage drop at the load is kept within the recommended
CABLE CONVERSION CHART – METRIC vs. ENGLISH
LOW-TENSION PRIMARY CABLE – SAE J1128
Metric
English
Metric
English
0.5 mm2
20 Ga
5.0 mm2
10 Ga
0.8 mm2
18 Ga
8.0 mm2
8 Ga
1.0 mm2
16 Ga
13.0 mm2
6 Ga
2.0 mm2
14 Ga
19.0 mm2
4 Ga
3.0 mm2
12 Ga
10 percent maximum level for the respective 12V or 24V power system.
• Wire gauge reductions are permissible after the point at which circuit protection is
added or enabled.
• Wires should be specified with suitable insulation type for the environment. For
instance, GXL (general purpose, cross-linked polyethylene insulated) wire with a
medium insulation thickness has a rating of +135°C (+275°F) where the compartment
temperatures can exceed +80°C (+176°F) such as the engine compartment.
NOTE: Review the individual over-current shutdown values in the
configuration and use the correct wire gauge conductor to accommodate
maximum load current configured.
• Use a protective fuse or circuit breaker on the positive input power lead (J2) that is
sized appropriately for the PDM supply steady-state load current. Typical maximum
load current is 60 percent - 80 percent of the fuse rating not to exceed 70 A.
• Verify that the harness is constructed to meet the needs of the application environment
(e.g. shock, vibration, moisture, temperature, chemicals and impact).
• Make certain that the harness is designed and constructed to minimize induced
interference resulting from EMI coupling between signal wires.
• Separate power circuits from low-level signals.
• Make provisions for drip loops to attach devices in exposed locations and prevent
moisture entry and formation within the connectors.
• Provide sufficient clearance from moving parts.
• Wires routed through holes in the vehicle body/chassis should use grommets.
• Avoid sharp metal edges, fasteners and other abrasive surfaces or use protective
shielding when routing harness assembly.
• Route wires to avoid exhaust system components or other high temperature areas. Use
appropriate heat shielding or other insulation where routing is a problem.
• Avoid routing near wheel wells or provide adequate mechanical protection (e.g.
convoluted conduit) to the wire assembly.
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3 Electrical Connections
PIN
FUNCTION
LIMIT
Mating Connector
J1
Ground
70 A continuous (return)
DTHD 06-1-4S
J2
V
BATT
70 A continuous (source)
DTHD 06-1-4S
3.1 Connectors J1 and J2
The connector pinout is as viewed looking into the PDM receptacles or from the wire side of
the mating plugs.
J2 J1
+ −
IMPORTANT: A circuit breaker or fuse is required on the
connection leading to J2 and should be located near the battery or
power source.
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Pin
Function
Limit
Mating Connector
J3-1
5V Regulated Output
GND (Isolated)
5 V @ 70 mA (both pins)
J3-2
Digital Input 12
0-28 VDC
J3-3
Digital Output 7
15 A (PWM @ 100 Hz)
J3-4
Digital Output 8
15 A (PWM @ 100 Hz)
J3-5
Digital Output 9
15 A (PWM @ 100 Hz)
J3-6
Digital Output 10
15 A (PWM @ 100 Hz)
J3-7
Analog Input 8
0 – 5 V
J3-8
Analog Input 7
0 – 5 V
J3-9
Analog Input 6
0 – 5 V
J3-10
Analog Input 5
0 – 5 V
J3-11
Analog Input 4
0 – 5 V
J3-12
5V Regulated Output
(+)
5 V @ 70 mA (Both pins)
3.2 Connector J3
The connector pinout is as viewed looking into the PDM receptacles or from the wire side of
the mating plugs.
J3
DT06-12SA (Gray)
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3.3 Connector J4
Pin
Function
Limit
Mating Connector
J4-1
Digital Output 1
15 A (PWM @ 500 Hz)
J4-2
Digital Output 2
15 A (PWM @ 500 Hz)
J4-3
Digital Output 3
15 A (PWM @ 500 Hz)
J4-4
Digital Output 4
15 A (PWM @ 500 Hz)
J4-5
Digital Output 5
15 A (PWM @ 500 Hz)
J4-6
Digital Output 6
15 A (PWM @ 500 Hz)
J4-7
Analog Input 3
0 – 5 V
J4-8
Analog Input 2
Resistive
J4-9
Analog Input 1
Resistive
J4-10
Digital Input 11
0 – 28 VDC
J4-11
Digital Input 2
0 – 28 VDC
J4-12
Digital Input 1
0 – 28 VDC
The connector pinout is as viewed looking into the PDM receptacles or from the wire side of
the mating plugs.
J4
DT06-12SB (Black)
NOTE: Digital Inputs 1 and 2 are used to set the Source Address.
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3.4 Connector J5
PIN
FUNCTION
LIMIT
Mating Connector
J5-1
CAN LOW
-
J5-2
Digital Input 3
0 – 28 VDC
J5-3
Digital Input 4
0 – 28 VDC
J5-4
Digital Input 5
0 – 28 VDC
J5-5
Digital Input 6
0 – 28 VDC
J5-6
Regulated Output GND
(Isolated)
5 V @ 70 mA (both pins)
J5-7
Regulated Output (+)
5 V @ 70 mA (both pins)
J5-8
Digital Input 7
0 – 28 VDC
J5-9
Digital Input 8
0 – 28 VDC
J5-10
Digital Input 9
0 – 28 VDC
J5-11
Digital Input 10
0 – 28 VDC
J5-12
CAN HIGH
-
The connector pinout is as viewed looking into the PDM receptacles or from the wire side of
the mating plugs.
J5
DT06-12SC (Green)
NOTE: The CAN bus circuit has an auto-termination detection circuit builtin that is disabled by default.
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3.5 Connector J6
PIN
FUNCTION
LIMIT
Mating Connector
J6-1
Digital Output 12
15 A (PWM @ 100 Hz)
J6-2
Digital Output 11
15 A (PWM @ 100 Hz)
The connector pinout is as viewed looking into the PDM receptacles or from the wire side of
the mating plugs.
J6
DTP06-2S
NOTE: Deutsch DT series contacts are size 16. DTP series contacts are
size 12.
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4 Communication
4.1 Overview
The IX3212 PDM uses proprietary SAE J1939 CAN messages to configure control, and
communicate the I/O status. PowerView displays or a compatible CAN 2.0B CAN bus device
can be used to send CAN messages.
Each CAN message has an identifier in the first byte that determines the message context.
There are five unique identifiers associated with command and configuration and nine unique
identifiers associated with input status, feedback, diagnostics and data reported by the PDM.
4.1.1 Source Address
The Source Address (SA) is set using the first two digital inputs. A 1/open indicates the input
is open circuit or at high potential (i.e., connected to battery positive DC). A 0 indicates the
input is connected to a low potential (i.e., ground). Inputs contain a pull-up resistor that
interprets the input as High if left unconnected. Table 1 lists the available source addresses
and allows for up to four PDM modules on a single CAN bus. The PDM defaults to SA 30
(17h) if the inputs are not connected. The PDM does not support SA arbitration according to
J1939.
Digital Input 1 Digital Input 2 SA
1/open 1/open
0 1/open 31 (1Fh)
1/open 0 32 (20h)
0 0 33 (21h)
Table 1 – Source Address Selection
IMPORTANT: When multiple PDMs are connected to the same CAN
bus, each PDM must have a unique SA.
The PDM sends messages to and expects to receive messages from SA 17 (11h) regardless
of the actual SA claimed by the configuring and controlling device(s). If a system has a cruise
control or steer axle controller, the SA may conflict with the PDM.
30 (1Eh) default
4.1.2 Loss of Communication
The PDM expects to receive commands from a controlling device every second. If a CAN
command message is not received, the PDM assumes that the CAN bus is faulted and goes
into a Loss of Communication mode. Each output can be individually configured to respond in
prescribed way and is further defined in the section on Loss of Communication.
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4.1.3 Output Modes
Two slave modes of operation are possible where the PDM is configured and controlled by a
PowerView display or some other CAN bus controller.
1. High-Side Switch (HSS): This mode of operation is the typical standard output to turn a
load on or off. The individual outputs can switch up to 15 A loads. This mode also
supports PWM to drive a load proportionally (open-loop).
2. H-Bridge (HB): This mode allows two adjacent outputs to switch polarity of the voltage
applied to the load. This is often used to change direction of a DC motor and run it in
reverse. This mode supports PWM to drive a load proportionally.
4.1.4 Special Methods of Operation
The PDM is a flexible power I/O module and offers the following configurable features:
4.1.4.1 Power on Reset (POR)
This mechanism enables the PDM to retain an output state through power cycles of the unit.
The PDM can power up with individual outputs at predefined PWM levels.
4.1.4.2 Local Source Control
Local Source Control (LSC) is a mode that enables any digital input to trigger the
respective output. The effect of this mode is to allow any number of outputs to be
autonomously commanded by the specified input.
It is possible to use the PDM in stand-alone operation using LSC. Once the PDM has
been configured on the production line, the unit can operate autonomously.
An example use of this function is connecting a key switch to a digital input on the PDM
to power an output, which in turn energizes the remainder of the electronic modules that
are driven by the key switch.
Using this feature inhibits the other output modes of operation such as the PWM values
on the specific outputs configured for LSC mode.
IMPORTANT: Configuring LSC mode on an output disables the Loss
of Communication function for the respective output since there is
no way of knowing if CAN communication is expected or not.
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