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Installing and Connecting the Basic System
S5-95F
How to Connect Check DQs
Connect the 24 V DC load voltage for the check DQs
(L+ potential to terminal 11 and L- potential to terminal 20)
The load voltage source must also supply the failsafe DIs.
Connect the sensor lines which are to be monitored for conductor-to-conductor short circuit to
different check DQs.
Monitoring the Connection of Failsafe Onboard DI with Single-Channel, Failsafe Sensor via
Check DQ (Type D)
Figure 4-10. Connection of a Check DQ for Short-Circuit Test for Single-Channel, Failsafe
Sensor
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Subunit A
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Single-channel, failsafe sensor
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Subunit B
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DQ 33.1
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Connection to further sensors
4-12
EWA 4NEB 812 6210-02