Inhibit Loop
An inhibit loop monitors the presence of the PU4 and CLE modules. Pulling the PU4 and the CLE causes the
interruption of the monitoring loop and the secondary voltages from PS-1 and PS-2 (if available) are discon-
nected.
[dwinhloo-180314, 1, de_DE]
Figure 13-4
Inhibit Loop for the Power Supplies
i
i
NOTE
An On/Off switch (PS) on the PU4 (not accessible from outside) also interrupts this monitoring loop.
If only the CLE/FOM1 module is not used, the jumper X41 must be inserted in position 1-2.
If the FOM2 is not used, the jumper X42 must be inserted in position 1-2.
!
DANGER
The ON/OFF switch on the PU4 powers down the device, but does NOT cut the primary supply voltage
(auxiliary voltage). Dangerous voltages may be present even if the device has been powered off via the
PU4.
If you do not comply with the safety notes, this will result in death, severe injury, or considerable
material damage.
²
Make sure that the power is turned OFF by switching the external voltage separator in the cabinet or
rack to OFF position.
13.2.3
Power Supply
13.2 Connection of the Power Supply
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
365
C53000-G6040-C605-1, Edition 03.2020
