34
Device Description
WAGO-I/O-SYSTEM 750
753-668/000-004 4FAI 0/4-20 mA Diff PROFIsafe
Manual
Version 1.0.0, valid from HW/SW Version 01/01
Table 13: Technical Data
– Analog Inputs
Number of inputs
4 (single-channel analysis)
2 pairs (two-channel analysis)
Connection types
2-, 3- and 4-wire connection
Measurement range
0
… 20 mA
4
… 20 mA
Sampling frequency
100 Hz / 60 Hz / 50 Hz / 10 Hz
Interference frequency suppression 38 dB at 50 Hz / 60 Hz
Resolution
16 bits
(data format, see Section “Process
Image” > … > “Analog Value Data Format
of the Input Process Values”)
Measurement deviation at 25 °C
< ±0.05 % of full scale value
Temperature coefficient
< ±65 ppm/K of full scale value
Measurement deviation over
temperature range
< ±0.25 % of full scale value
Measurement deviation due to aging
- < ±0.1 % of full scale value after
1000 operating hours
- < ±0.2 % of full scale value after
8000 operating hours
< ±0.6 % of full scale value after 20 years
Common mode voltage
max.
< ±60 V
Shunt resistance
typ.
200
Ω
Safety precision
For single channel applications:
±1.25 % of full scale value plus temperature
drift, measured value deviation and aging
For two-channel applications:
The lesser value of ±1.58 % or the two-
channel evaluation tolerance ±0.45 %, in
each case based on the full scale value
plus temperature drift, measured value
deviation and aging
Maximum current carrying capacity
40 mA
Common mode rejection
typ.
87 dB
Examples for safety-related accuracy in two-channel applications
Example 1:
Set two-channel evaluation tolerance: ±2 %
Resulting accuracy for two-channel applications: ±2.45 %
Safety-related accuracy for Example
1: ±1.58 %
Example 2:
Set two-channel evaluation tolerance: ±0.5 %
Resulting accuracy for two-channel applications: ±0.95 %
Safety-related accuracy for Example 2: ±0.95 %