Siemens SIMATIC ET 200X, Manual

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Technical Specifications
7-84
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
EM with analog outputs
The expansion modules with analog outputs allow digital values inputted by means
of a controller to be converted in an expansion module to corresponding analog
signals (current or voltage) that control actuators (setpoint input for speed
controllers, temperature controllers, etc.).
Features of the analog outputs
The expansion modules with analog outputs have the following features:
Different measuring ranges:
– 10 V
– 20 mA, 4 to 20 mA (parameterizable)
SIMATIC S7 and SIMATIC S5 data format (parameterizable)
Resolution of 11 bits plus sign
2 channels (same measuring range and data format for both channels of an
expansion module)
24 VDC supply voltage
Analog outputs not isolated from the internal electronic components
Measuring ranges in SIMATIC S7 and S5 format
The following table compares the measuring ranges (rated ranges) in SIMATIC S7
and SIMATIC S5 format:
Table 7-39 Representation of measuring ranges for analog inputs
Measuring range Representation of the
rated ranges in
SIMATIC S7 format
Representation of the
rated ranges in
SIMATIC S5 format
±
10 V
±
20 mA
–27648 to +27648 –2048 to +2048
4 to 20 mA 0 to +27648 512 to +2560
PT100 Standard 0.1
o
C/digit 0.5
o
C/digit
–100 to +850
o
C –200 to +1700
–200 to +850
o
C –2000 to +8500
Table 7-40 Representation of measuring ranges for analog outputs
Output range Representation of the
rated ranges in
SIMATIC S7 format
Representation of the
rated ranges in
SIMATIC S5 format
±
10 V
±
20 mA
–27648 to +27648 –1024 to +1024
4 to 20 mA 0 to +27648
0 to +1024