Power Supply; Stand-Alone Unit; Integrated Unit - Siemens SWT-3000 Equipment Manual

Functional Description

Power supply

Stand-alone unit

One or alternatively two power supplies can be used in the SWT 3000 system. They are decoup-
led via diodes on the rear PC board. The output voltages from SV-1 and SV-2 are monitored by the
PU3 module in order to detect failure of a power supply.
The interface modules IFC are supplied via the PU3.
Monitoring loop
BPSWT 3000
PU3e
a21
Figure 19:

Integrated unit

If the SWT 3000 is used in the PowerLink (iSWT) system the PU3 unit is supplied via the central
power supply of the PowerLink. The IFC modules are supplied via the PU3 again.
Page - 38
If two power supplies are used the SWT 3000 sub rack can only be
equipped with one unit.
The presence of the PU3 and CLE modules is monitored by an Inhibit
loop. If the PU3 and/or CLE is pulled, this interrupts the monitoring loop
and the secondary voltages from SV-1 and SV-2 (if present) are discon-
nected.
CLE/FOM1
c21
a21
X41
SV
1 2 3
GND
Inhibit loop for the power supply(ies)
An On/Off switch (SV) on the PU3 (not accessible from outside) also in-
terrupts this monitoring loop.
If only the CLE resp 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 in position 1-2.
Edition p3_3_2x 08/09
FOM2
a21
c21
X42
1 2 3
GND
SWT 3000 Equipment Manual
SV2
c21
GND
SV1
© SIEMENS AG 2008