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THERMOCOUPLE FEATURES

Reads up to 20 Type J or K thermocouple inputs Temperatures are configured to indicate the SAE J1939 SPN to be transmitted by that temperature input. Suspect Parameter Numbers (SPNs) for configuration of temperature inputs are customer specific. Resolution: One byte parameters have a resolution of 1 °C / bit and a range of -40 °C to 210

°C. Two byte parameters have resolution of

0.03125 °C / bit and a range of -273 °C to 1735 °C Cold junction compensation is provided

System throughput has all 20 channels scanned in 2 seconds (100 ms/channel) Overall drift with temperature is 0.015% / °C of span (maximum)

Module is fully functional during configuration and communications

Parameter values and diagnostic error codes are retained when the modules are de-energized

Open-circuit and short-circuit diagnostics are supported

Can be mounted directly on the generator set panel or remotely Suitable for moist, high shock and vibration environments

THERMOCOUPLE SPECIFICATIONS ELECTRICAL SPECIFICATIONS

Accept 5-32 VDC power (12 or 24 VDC nominal) Over voltage capability is 32 VDC for 1 hour @ 85°C

Power supply inputs are protected against transient surges and short circuits and are isolated from I/O

Three way isolation is provided for the CAN line, inputs and power supply Burden is limited to less than 200 mA; inrush not to exceed 800 mA Common mode rejection is -80 db@ 5V p-p (50-60 Hz)

Common mode input range is +/- 4 V minimum

Designed to meet relevant European standards for EMI/RFI/Immunity without the use of external filtering

ENVIRONMENTAL SPECIFICATIONS

Encapsulated in a rugged aluminum housing with watertight Deutsch connectors (IP65 rating)

Operating temperature range -40 to 85°C (-40 to 185°F) (for ambient

temperatures exceeding 85°C, the temperature scanner may deviate in accuracy an additional ±1°C)

The ambient storage temperature range is -50°C to +120°C

It is protected against 95% humidity non-condensing, 30°C to 60°C NETWORK COMMUNICATIONS INTERFACE

Capable of operating on the EMCP 4 Accessory CAN (2) data link Node address is auto configurable

Optical isolation is provided for the CAN line

Retains current date and time relative to synchronization every 24 hours (or upon boot up) with equipment system time via an explicit command from the EMCP 4 or Service Tool when the GSC is not available; synchronization time is accurate to within 1 second

Includes a watchdog timer to atomically reboot should the microprocessor lock Module operates normally with loss of communication link, retaining configured values and error codes in non-volatile memory

Configuration and firmware updates are accomplished with the Cat Service Tool over the CAN network

THERMOCOUPLE WIRING

POWER AND CANBUS WIRING

THERMOCOUPLE SENSOR WIRING

THERMOCOUPLE PHYSICAL LAYOUT

Figure 41: Thermocouple, RTD, And Discrete I/O Module Physical Layout

THERMOCOUPLE MODULE – CONFIGURATION

The Thermocouple module is field programmable using the Cat Service Tool. It is also flash programmable to update software using the Cat Service Tool.

The service tool software must be installed on a Windows PC. The Cat communication adapter must be connected between the PC and the CAN data link on which the target Thermocouple module is connected. When connecting the Thermocouple module, the user will first see the Module Summary screen shown inFigure 42.

Figure 42: Cat Service Tool Thermocouple Module Summary Screen

The service tool configuration tool contains setpoints for configuring the Thermocouple module identification, as well as the thermocouple inputs.

Figure 43 shows the ECM Identification Parameters list. This list shows the ECM serial number (read-only) of the module that is connected, and allows for configuration of the ECU instance. Each thermocouple module on the data link must have a unique ECU instance. If ECU instances are duplicated, one of the modules must be disconnected and the other reconfigured to a different ECU instance.

Note: ECU Instance #1 is reserved for the Accessory Data Link (CAN 2), while ECU Instance #2 is reserved for the Primary Data Link (CAN 1).

Figure 43: Cat Service Tool Thermocouple Module Identification Parameters

Upon changing the ECU instance, the Cat Service Tool will automatically reconnect to the data link, and the Thermocouple module name should reflect the

new ECU instance. In this example, as shown in Figure 44, the module was previously named Thermocouple Module #1, and after the ECU instance is changed to 2 and the service tool reconnects, the name reads Thermocouple Module #2.

CONFIGURING THERMOCOUPLE INPUTS

Figure 45 shows the THERMOCOUPLE INPUT #1 Configuration list, when using the Cat Service Tool. All twenty thermocouple inputs have identical parameters and options.

Figure 45: Cat Service Tool Thermocouple Input Configuration

The SENSOR TYPE CONFIGURATION selects either a J or K type configuration. Select the appropriate configuration based on the type of thermocouple installed. Reference the TC Module specsheet (LEHE0126) for available Temperature Inputs.

The SUSPECT PARAMETER NUMBER (SPN) is a numerical entry between a predetermined list of SPNs that are supported by the Thermocouple module. All of the thermocouple inputs support the same list of SPNs. To change the SPN, type in the number that corresponds with the desired parameter as shown in Figure 46. See UENR1209 for specific information on what possible SPN values can be used.

The HIGH TEMPERATURE SHUTDOWN EVENT THRESHOLD sets the high temperature at which a high shutdown event will occur.

The HIGH TEMPERATURE WARNING EVENT THRESHOLD sets the high temperature at which a high warning event will occur.

The LOW TEMPERATURE WARNING EVENT THRESHOLD sets the low temperature at which a low warning event will occur.

The EVENT NOTIFICATION DELAY TIME sets the amount of time the threshold must be exceeded until the Thermocouple module triggers that particular event on the data link.

Each of the delay time options corresponds with a particular event type.

17.4 RTD MODULE (EMCP 4.2 ONLY)