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| MOD-MUX |
MM8TC ISO
The module uses differential inputs to reduce effects of electrical noise
and mains pickup. The thermocouple inputs are isolated from the logic
PM8TC module and is fully interchangeable. The thermocouple voltage
is read by the module circuitry, linearised and converted to degrees as
indicated in the TC table. 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.
The DIP switch 9 is used to select upscale or downscale burnout. A
value of 32768 is used to indicate upscale burnout and 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.
and mains pickup. The thermocouple inputs are isolated from the logic
PM8TC module and is fully interchangeable. The thermocouple voltage
is read by the module circuitry, linearised and converted to degrees as
indicated in the TC table. 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.
The DIP switch 9 is used to select upscale or downscale burnout. A
value of 32768 is used to indicate upscale burnout and 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.
Innovative Evolution