PM6NTC - 6 NTC INPUT MODULE

The PM6NTC module is a 6 NTC input module. The module uses 2 wire NTC sensors. The NTC inputs are isolated from the logic.

The NTC resistance is read by the module circuitry, linearized and converted to degrees Centigrade or Fahrenheit. No ranging is required as the module covers the full range of the NTC as indicated in the NTC table. The value that is read from the Modbus register is the actual temperature in degrees to 0.1°C resolution. ie: a value of 3451 corresponds to a temperature of 345.1°C.

The NTC type is setup by writing a value to the NTC Type register. The value is obtained from the table below. For example to select a 10K NTC, the value “1” must be written to the NTC Type register. All 6 NTC inputs adopt the same NTC 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 NTC’s must be used in order to prevent ground loops and reading errors.