user manual

ND-20292
CHAPTER 2
APRIL, 1990
The voltages for each PSU can be checked individually
.1 by first turning the system AC switch ON and then the
switch on each power supply ON.
250.2 PSE-DD-1 PSU
NOTE: Before proceeding to install the PSE-DD-1
PSUs, ensure theInput Line Cords are not
connected to the locally provided -48VDC
power source and the input power switches
on each PSE-DD-1 PSU are in the OFF
position. The input line cords for the
PSE-DD-1 PSUS must be locally provided.
A.
B.
C.
D.
Remove the four mounting screws located at the
top and bottom of the PSU slot, in each CCU.
Place the screws aside for later reuse.
Install a PSE-DD-1 PSU into the PSU slot in each
CCU, making sure its power switch is in the OFF
position.
Secure the PSU with the screws removed in
Step A.
One cable is provided with each PSE-DD-1 PSU.
This cable is a six pin connector-ended, for DC
OUT power cable. Connect each DC IN power
cable of each PSU to the 6 pin (54) connector
located immediately above in its CCU. (See
Figure 200-34 and Figure 200-35)
Figure 200-34
E. One screw terminal block provided with four
screws is located on the lower front of each PSE-
DD-1 PSU. Connect up to four PSE-DD-1 PSUs
using locally provided cables, as shown in Figure
200-36.
GREEN
I
GREEN
Figure 200-35
F.
G.
H.
Figure 200-36 Installation of PSE-DD-1
Connect the first PSE-DD-1, installed in the
ESE-32B-1 CCU, to the output of the locally
provided -48 VDC power source, using a locally
provided cable.
1.
2.
3.
4.
Turn ON the locally provided -48V DC power
source.
Turn ON the power switch on the PSE-DD-1
PSU located in the third ESE-32E-1 CCU.
Turn ON the power switch on the PSE-DD-1
PSU located in the second ESE-32E-1 CCU.
Turn ON the power switch on the PSE-DD-1
PSU located in the first ESE-32E-1 CCU.
(See Figure 200-371
Check the DC output voltages which can be read
on the corresponding 6 pin (54) connector of each
CCU, as shown in Figure 200-38. These voltages
can be checked at the test pins on the CPU-E( 1
ETU or on the MMC-E ETU, in the corresponding
ecu.
200 - 33