Process Image; I/O Modules With Pt Resistance Sensors; Pt100; Table 16: I/O Modules With Pt Resistance Sensors - WAGO -I/O-SYSTEM 750 Manual

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Process Image

4 Process Image
The I/O module transfers 16 bits per channel of measured data and, optionally, 8
status bits to the fieldbus coupler/controller. Access to the status bits depends on
the specific fieldbus system.
Mapping of process data in the process image of fieldbus systems
The representation of the I/O modules' process data in the process image depends
on the fieldbus coupler/controller used. Please take this information as well as the
particular design of the respective control/status bytes from the section "Fieldbus
Specific Design of the Process Data" included in the description concerning the
process image of the fieldbus coupler/controller used.
4.1

I/O Modules with Pt Resistance Sensors

Table 16: I/O Modules with Pt Resistance Sensors

750-461
750-461/000-003
750-461/000-006
750-461/000-200
750-461/025-000
4.1.1

Pt100

The I/O modules 750-461and the versions 750-461/000-006 and 750-461/025-000
calculate the resistance values of Pt100 sensors and output the data as temperature
values. The temperature values are displayed at a resolution of 1 digit per 0.1 °C
in one word (16-bit). Temperature values below 0 °C are represented in two's
complement binary. As a result, 0 °C corresponds to the numeric value 0x0000
and 100 °C to the numeric value 0x03E8 (dec. 1000). The possible numeric range
corresponds to the defined temperature range of -200 °C to +850 °C for Pt100
sensors.
Evaluation Pt100
Measuring range: −200 °C to +850 °C
Evaluation Pt1000
Measuring range: −200 °C to +850 °C
Evaluation Pt100, optimized temperature drift
(0.001 %/K, conversion time 960 ms)
Measuring range: −200 °C to +850 °C
Evaluation Pt100, with status information for
S5-FB250 in the data word
Measuring range: −200 °C to +850 °C
Evaluation Pt100, extended temperature range
Measuring range: −200 °C to +850 °C
WAGO-I/O-SYSTEM 750
750-461 2AI Pt100/RTD
Manual
Version 1.4.0