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PROBUS – I/O Modules

PB6RTD - 6 RTD Input Module

The PB6RTD 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. Each RTD input can be disabled/enabled and the RTD type can be individually configured.

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

Input 6 x RTD Inputs
RTD Types PT100, Ni 120, PT1000, Ni1000 -DIN, Ni1000 Landys & Gyr
Connection 2 or 3 wire
Resolution 0.1 Deg.C
Sample rate No. of inputs enabled X 320ms
Drift 100 ppm/Deg.C typ.
Isolation (Field & Logic) 1500VAC RMS



PB6RTD - 6 RTD Input Module
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