Siemens simatic c7-621 Hardware Installation Manual page 99

Analog Output The following table contains the technical data of the analog output of the
C7 CPU.
Module-Specific Data
Number of outputs
Cable length
shielded
Analog Value Formation
Resolution (including
overflow)
Conversion time
Settling time
For ohmic load
For capacitive load
For inductive load
Substitute values applied
Noise Suppression, Error Limits
Error limits (in the entire
temperature range related to
the output area)
Voltage output
Current output
Error limit (error limit at 25
C, related to the output area
Voltage output
Current output
Temperature error (related to
output range)
Linearity error (related to
output range)
Reproducibility accuracy (in
settled state at 25 C, related to
output range
Output ripple: Range 0 to 50
kHz (related to output range)
Status, Interrupts, Diagnostics
Interrupts
Diagnostic functions
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
Data for Selecting an Actuator
1 Output ranges (rated values)
Voltage
Current
max. 100 m
Load resistance
For voltage output
11 bits + sign
Capacitive load
For current output
40 s
Inductive load
0.6 ms
Voltage output
1.0 ms
Short circuit protection
0.5 ms
Short circuit current
no
Current output
Idle voltage
Immunity limit against
externally applied
voltages/currents
1.0 %
Voltages at output against
M
1.0 %
Current
0.8 %
Connection of actuators
0.9 %
For voltage output
0.01 %/K
2-wire connection
4-wire connection
0.06 %
For current output
2-wire connection
0.05 %
0.05 %
none
none
C7-621 Analog I/Os
10 V
20 mA
min. 2.0 k
max. 0.1 F
max. 300
max. 0.1 mH
yes
max. 40 mA
max. 16 V
max.
permanent;
ANA
15 V for max. 1 s
(pulse duty factor
1:20)
max. 30 mA
Possible
Not possible
Possible
15 V
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