ABB Switzerland Ltd 1KHW001489-EN ETL600
3.3.13. Power supplies B5LA and B5LC
The power supply B5LA is used when the external power supply
voltage is 48 VDC and the power supply B5LC is used when the
external power supply is 230 VAC or 115 VAC. The power supply also
houses filters for suppressing ripple and voltage surges, ON/OFF
magnetic switch and test points for measuring the input voltage and
the output 48 VDC voltage. The technical data for the power supply
inputs are
Secure AC supply (use B5LC) 115/230 VAC
+10 / -15 %
50/60 Hz
+ 5%
Secure DC supply (use B5LA) 48 VDC
+20 / -15 %
ripple ≤ 5 % pp
Caution
Make sure that the power supply B5LC is
programmed to the correct voltage of 230 VAC or
115 VAC as described in 1KHL015788 before
connecting the equipment to the power source.
3.3.14. Power subrack P7LA
The power subrack P7LA houses the following plug-in units:
• Power supply B5LA
• Tx filter E5TX
• RF hybrid P3LE
The power amplifier P1LA is mounted in the rear of P7LA. Provision is
made on P7LA for connection of external power supply and RF coaxial
cable.
Fig. 3-25 shows the block diagram of P7LA equipped with the above
listed plug-in units.
For ETL680, a second P7LA is mounted on top of the first, equipped
with the combiner P3LG instead of the hybrid P3LE.
3-36 November 2005 Structure and Function
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