MMTCP8TC

MMTCP8TC - THERMOCOUPLE INPUTS

The MMTCP8TC module is a 8 thermocouple input module. The module uses differential inputs to reduce effects of electrical noise and mains pickup. The thermocouple inputs are isolated from the logic. If inter channel isolation is required then the MMTCP8TCISO should be used.

The thermocouple voltage is read by the module circuitry, linearised and converted to degrees Centigrade. No ranging is required as the module covers the full temperature range of the thermocouple. The value that is read from the Modbus register is the actual temperature in degrees centigrade to 0.1°C resolution. ie: a value of 3451 corresponds to a temperature of 345.1°C.

The thermocouple type is setup by writing a value to the TC Type register. The value is obtained from the table below. For example to select type K thermocouples, the value "2" must be written to the TC Type register. All 8 thermocouple inputs adopt the same TC type.

A value of -32767 is used to indicate downscale burnout.

The module has built in Cold Junction Compensation. Use must be made of the correct thermocouple extension wire to avoid reading errors.

The thermocouple module can also be configured for a 0 - 50mV input range. The TC Type register must be set to 9 for this option. The value in the register which is read back over the network is 0 - 50,000.

Note: As there is no inter-channel isolation, isolated thermocouples must be used in order to prevent ground loops and reading errors.

Each MMTCP8TC Module has a unique Ethernet IP address which must be programmed into the PC or PLC. The IP address in the MMTCP8TC Module is configured via the Web Server. Any standard Web browser such as Internet Explorer can be used to access the web pages were configuration is carried out. The converters are factory programmed with a default IP address of 169.254.111.111. This address must be changed before the converter is added to an existing network.

The web page address for viewing the Thermocouple input parameters is http://169.254.111.111/index.htm and the address for viewing the configuration data is http://169.254.111.111/tconfig.htm.

The web page address for configuring the module is http://169.254.111.111/ip.htm .

SPECIFICATIONS

Power Supply: (Logic) 10 - 26 Vdc @ 140 mA

Inputs:

                TC       Type        Range             Accuracy
                1     -     J     -200 to 760 °C           0.2°C
                2     -     K     -200 to 1370 °C         0.3°C
                3     -     E         0 to 600 °C           0.1°C
                4     -     T     -200 to 400 °C           0.3°C
                5     -     N         0 to 1300 °C          0.3°C
                6     -     B      400 to 1820 °C          0.5°C
                7     -     S       -50 to 1767 °C         0.6°C
                8     -     R       -50 to 1767 °C         0.7°C
                9     -     mV       0 to 50mV             0.1%
                10   -     C       0 to 2315.5 °C         0.7°C
                11   -     D       0 to 2315.5 °C         0.7°C
                12   -     G       0 to 2315.5 °C         0.9°C

Resolution 0.1°C

Drift 100ppm/°C Typ.

Isolation 1000Vrms between field and logic

CJC error: ±1.0°C Typ.

Ethernet: 10BaseT - 10Mbits/s twisted pair

Connector:       11 Pin Connector on rear of unit
                       RJ45 on front of module for 10Base-T Ethernet
                       18 Way screw connector on front

WIRING

CONFIGURATION

The Web page address "169.254.111.111/ip.htm" is entered into the address line of the browser window to access the configuration page. This page allows you to change the IP address of the MOD-MUX TCP Module, select the TC type, and to enter a Module Description Name and Input Names for identification/maintenance purposes.

IP Address: The new IP address can be entered into the web page as shown above. After this has been done, you must click the Submit button to send the values to the MOD-MUX TCP Module. The screen will now be updated and if successful will continue to display the new IP address. The new IP address will only be effective after the MOD-MUX TCP Module power has been switched off and on again. This feature allows you to check that the correct IP address has been entered before being activated. If the IP address has been entered incorrectly and the power has not been switched off, it is possible to re-enter the correct IP address. If the power has been switched off and back on again, the MOD-MUX TCP Module will not communicate until you enter the new IP address into the address line of the browser window.

	TC Type: The thermocouple type for the module can be configured by entering the corresponding number from the list in the specifications.
	Module Name: This field allows you to enter a module description name into the MOD-MUX TCP Module. This is an identifier for diagnostic/maintenance purposes and is chosen to best describe the MOD-MUX TCP Module in the system by name or number.
	Input Names: These fields allow you to enter an input description name into the MOD-MUX TCP Module. This is an identifier for diagnostic/maintenance purposes and is chosen to best describe the particular input by name or number.

VIEWING WEB PAGES

To view the default Web page in the MOD-MUX TCP Module, start the Web browser and type "169.254.111.111" into the address line of the browser window. The main page will now be displayed in the browser window.

	Channel Number: This refers to the actual input number on the terminals of the module.
	Channel Name: This is the name that was entered in the configuration page to best describe the inputs.
	Value: This is the current temperature of the inputs. To get an updated reading it is necessary to refresh the browser window to upload the web page again.

To view the Configuration Web page in the MOD-MUX TCP Module, start the Web browser and type "169.254.111.111/tconfig.htm" into the address line of the browser window.

	CJC Temperature: This is the temperature of the terminals inside the module.
	Input Type: This is the type of thermocouple the module has been configured to operate with.
	TC OFFSET: This is a correction factor
	Line Frequency: Depending on the mains frequency this can be either 50 or 60 Hz.

MMTCP8TC - THERMOCOUPLE INPUTS

Send mail to proconel@proconel.com with questions or comments about this web site.