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S5-95F
Fast-reacting actuators (e.g. quick-acting valves), may temporarily drop out during the test. If your
process does not tolerate this, you should select one of the following three options:
•
Use actuators with a sufficient lag
•
Call the DQ test at a non-critical system state
•
Connect diodes and/or RC networks to the actuators
Using Actuators with Sufficient Lag
The following table shows a selection of tested coupling relays, which have a sufficient time delay
and which do not drop out during the DQ test.
Table 4-6. Permissible Actuators for Connection to the S5-95F
Manufacturer
SIEMENS
SIEMENS
SIEMENS
SIEMENS
Telemecanique
ABB
AEG
Calling the DQ Test Only in the User Program
Since the outputs are briefly disabled during the DQ test (see section 4.3), it is possible that fast-
reacting actuators drop out unintentionally during operation.You should therefore not have the DQ
test carried out automatically by the S5-95F (background test), but at defined, uncritical system
states via the FB525 (see section 9.2.6).
Connecting Diodes and/or RC Networks to the Actuators
Connection of diodes and/or RC networks results in the actuators being released with a time delay.
Dimensioning of the components required depends on the actuator used. If you have special
questions, please contact your local Siemens representative.
EWA 4NEB 812 6210-02
Type
3TF2010-0BB4
3TH8031-0B
3TH3022-0B
3TH2022-0BB4
LP4-EC09
KC22E
SH04
Installing and Connecting the Basic System
Rated Power of
the Solenoids
3 W at 24 V DC
6.2 W at 24 V DC
6.2 W at 24 V DC
3 W at 24 V DC
2.4 W at 24 V DC
7 W at 24 V DC
1.2 W at 24 V DC
Rated Operational
Current
3×9 A at 400 V AC
4×10 A at 230 V AC
4×10 A at 230 V AC
4×4 A at 230 V AC
4×6 A at 230 V AC
4×4 A at 230 V AC
4×6 A at 440 V AC
4-17
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