Technical data of the analog inputs
Parameter
Value
Number of channels per module
4 configurable thermocouple (TC) inputs
Distribution of channels into groups
1 (4 channels per group)
Resolution
Temperature
0.1 °C
Voltage
15 bits plus sign
Connection of the signals I0+ to I3+
Terminals 1, 3, 5 and 7
Connection of the signals I0- to I3-
Terminals 2, 4, 6 and 8
Input type
Floating thermocouple
Galvanic isolation
Against internal power supply and other modules
Common mode rejection
> 120 dB at 120 V AC
Indication of the input signals
No
Module update time
All channels: < 1.6 s
Channel input resistance
On request
Input filter attenuation
-3 dB at 15 kHz
Cold junction error
±
1.5 °C
Conversion error of the analog values
caused by non-linearity, adjustment
error at factory and resolution within
the normal range
Typ.
0.1 % of full-scale (voltage)
Depending on thermocouple, see table
Chapter 1.6.2.1.3.9.1.1 “Accuracy of ther-
mocouple ranges at 25 °C (with cold junction
at 25 °C
Max.
±
2 % of full scale (T-Type:
±
3 % for -240
°C...-270 °C)
at 0 °C...60 °C
Relationship between input signal
and hex code
Chapter 1.6.2.1.3.8 “Measuring ranges” on page 378
Analog to digital conversion time
400 ms per channel
Unused inputs
Can be left open and should be configured as "unused"
Input data length
8 bytes
Overvoltage protection
Yes, up to 30 V DC
Repeatability
On request
Wire loop resistance
< 100
W
Max. cable length (conductor cross
section > 0.14 mm
²
)
Unshielded wire
10 m
Shielded wire
100 m
Device specifications
I/O modules > Analog I/O modules
2022/01/31
3ADR010278, 3, en_US
381
