Siemens ET 200pro Operating Instructions Manual page 400

Analog electronic modules
15.3 Analog electronic module 4 AI RTD High Feature (6ES7144-4JF00-0AB0)
Technical specifications
Monitoring for
•
Isolation
Isolation tested with
Electrical isolation
•
•
•
Permitted potential difference
•
* With 3-wire resistance measurement (and resistance thermometer), the values of the measuring
resistances and the line resistances are updated in alternating cycles.
Note
The module achieves the highest accuracy with the 4-wire connection system (see technical
specifications above).
Although the 3-wire connection system compensates for the missing wire, the accuracy is
impaired. With the 2-wire connection system, the line resistances considerably impair the
accuracy.
In the last two cases this impairment is not determinable.
Note
With the 3-wire connection system, the compensation for the missing line is only ensured if
the length and cross section of all 3 wires in the cable are the same.
See also
Connection module CM IO 4 x M12 for electronic modules (Page 261)
Response times for analog input modules (Page 509)
400
Wire break
Between channels and backplane bus
Between channels and electronics/
encoder supply 1L+, 2L+
Between channels
Between inputs (U )
CM
Yes, between terminals 1 and 3
500 V DC
Yes
Yes
No
10 V AC
pp
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08