I/O Module For Ntc Resistance Sensors; Table 30: I/O Module 750-461/003-000, Input Fields For Hardware Matching; Table 31: I/O Module For Ntc Resistance Measurement; Table 32: Process Image For Version 750-461/020-000 - WAGO -I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-461 2AI Pt100/RTD

Table 30: I/O Module 750-461/003-000, Input Fields for Hardware Matching

Input field
Offset
Gain
2-Wire Offset
4.5

I/O Module for NTC Resistance Sensors

Table 31: I/O Module for NTC Resistance Measurement

750-461/020-000
The measured resistance values are converted and output as temperature values
for evaluation of the NTC 20 kOhm resistance sensors. All temperature values are
represented in a standard numerical format. The possible numeric range
corresponds to the defined temperature range for the sensors of
−30 °C ... +130 °C.
At the NTC 20 kOhm setting, the sensor temperature values are displayed at a
resolution of 1 digit per 0.1 °C in one word (16 bits). As a result, 0 °C
corresponds to the numeric value 0x0000 and 100 °C to 0x03E8 (dec. 1000).
Temperatures below 0 °C are represented in two's complement binary.

Table 32: Process Image for Version 750-461/020-000

Temperature
°C
< ca. −30.0
−30.0
0.0
25.0
50.0
100.0
130.0
> ca. 130.0
1)
Temperature values below 0 °C are represented in two's complement binary.
The measured value can exceed a decimal range of −300 ... +1300 before limitation takes effect.
Manual
Version 1.4.0
NTC 20 kOhm
Measuring range: −30 °C ... +130 °C
Resistance
Ω
Binary
> 414.70 '0000.1000.0101.0110'
414.70 '1111.1110.1101.0100'
70.20 '0000.0000.0000.0000'
20.00 '0000.0000.1111.1010'
6.72 '0000.0001.1111.0100'
1.12 '0000.0011.1110.1000'
0.46 '0000.0101.0001.0100'
< 0.46 '1000.0000.0000.0001'
Settings
0xECF0
0x2700
0x0180
1)
Numeric value
Hex.
0x2134
0xFED4
0x0000
0x00FA
0x01F4
0x03E8
0x0514
0x8001
Process Image 35
Status LED
Byte Error
Hex. AI 1, 2
Dec.
8500 0x42 ein
−300 0x00 aus
0 0x00 aus
250 0x00 aus
500 0x00 aus
1000 0x00 aus
1300 0x00 aus
−32767 0x41 ein