Siemens ET 200pro - Page 400

Analog electronic modules
15.3 Analog electronic module 4 AI RTD High Feature (6ES7144-4JF00-0AB0)
ET 200pro distributed I/O system
400 Operating Instructions, 03/2013, A5E00335544-08
Technical specifications
Monitoring for
• Wire break
Yes, between terminals 1 and 3
Isolation
Isolation tested with
500 V DC
Electrical isolation
• Between channels and backplane bus
Yes
• Between channels and electronics/
encoder supply 1L+, 2L+
Yes
• Between channels
No
Permitted potential difference
• Between inputs (U
CM
)
10 V AC
pp
* 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)