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| MOD-MUX |
MM6RTD
The MM6RTD module is a 6 RTD input module. The module can
accommodate either 2 or 3 wire RTD sensors. The RTD inputs are
isolated from the logic. The RTD resistance is read by the module
circuitry, linearised and converted to degrees Centigrade. No ranging is
required as the module covers the full range of the RTD as indicated in
the RTD 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 RTD type is setup by writing a value to the RTD Type register. The
value is obtained from the table below. For example to select a PT100
RTD, the value "1" must be written to the RTD Type register. All 6 RTD
inputs adopt the same RTD type.
The DIP switch 9 is used to select upscale or downscale burnout for
break detection. A value of 32768 is used to indicate upscale burnout and
a value of -32767 is used to indicate downscale burnout.
Note: As there is no inter-channel isolation, isolated RTD's must be used
in order to prevent ground loops and reading errors.
The MM6RTDB module is identical to the MM6RTD except that the
module has been designed for PT1000 temperature sensors.
accommodate either 2 or 3 wire RTD sensors. The RTD inputs are
isolated from the logic. The RTD resistance is read by the module
circuitry, linearised and converted to degrees Centigrade. No ranging is
required as the module covers the full range of the RTD as indicated in
the RTD 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 RTD type is setup by writing a value to the RTD Type register. The
value is obtained from the table below. For example to select a PT100
RTD, the value "1" must be written to the RTD Type register. All 6 RTD
inputs adopt the same RTD type.
The DIP switch 9 is used to select upscale or downscale burnout for
break detection. A value of 32768 is used to indicate upscale burnout and
a value of -32767 is used to indicate downscale burnout.
Note: As there is no inter-channel isolation, isolated RTD's must be used
in order to prevent ground loops and reading errors.
The MM6RTDB module is identical to the MM6RTD except that the
module has been designed for PT1000 temperature sensors.
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