Siemens Saturn Iie Epabx General Description Manual

SATURN IIE EPABX 
Maintenance and Troubleshooting 
Figure 2.08 is a block diagram which shows the ac power in- 
put to the Power System Unit and ac power distribution to 
the various system power supplies via the PSU circuit break- 
er panel. All circuit breakers and fuses are mounted on the 
PSU front panel. (Refer to Figure 2.01.) Figure 2.09 shows the 
layout of input/output connectors and terminals on the rear 
panel of the PSU. Table 2.00 lists the designations and func- 
tions of these connectors...

SATURN IIE EPABX 
Maintenance and Troubleshooting A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
LINE 
AC IN 
(AC #O 
IN 
LINE 
AC IN 
(AC #1 -- 
W 
l * 
J5 s ,.I LTUPSl l 
I P/O LTU SHELF 2 
(EXPANSION CABINET) 
LTIlPS2 l I P/O LTU SHELF 3 
(EXPANSION CABINET)  P/O LTU SHELF 1 
(BASIC CABINET) 
/ Jl 
+ -48PSl l 
l 
OPTIONAL DEPENDING UPON CUSTOMER/ 
SYSTEM REQUIREMENTS. 
l * SECOND AC INPUT IS REQUIRED WHEN 
EXPANSION CABINET IS USED. JUMPER 
PLUG AT J2 IS REMOVED AND SECOND 
AC SOURCE IS WIRED TO J2....

SATURN IIE EPABX 
Maintenance and Troubleshooting A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
Ftgure 2.09 Layout of Connectors and Terminals on PSU Rear Panel 
. 7-18  

SATURN IIE EPABX 
Maintenance and Troubleshooting A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
PSU 
-mm---- 
rP/O CIRCUIT j 
I BREAKER , 
* OPTIONAL DEPENDING UPON CUSTOMER/ 
SYSTEM RECIUIREMENTS J& TO BASIC SHELF 
I (BASIC CABINET) 
b TO LTU SHELF 
1 * 
: (BASIC CABINET) 
TO LTU SHELF 2 * 
(EXPANSION CABINET) 
& TO LTU SHELF 3 * 
(EXPANSION CABINET) 
J7 TO BASIC SHELF 
I (BASIC CABINET) 
&, TO LTU SHELF 1 * 
(BASIC CABINET) 
TO LTU SHELF 2 * 
(EXPANSION CABINET) 
& TO LTU SHELF 3 ’ ; 
(EXPANSION...

SATURN IIE EPABX 
Maintenance and Troubleshooting 
Table 2.00 Functions of Connectors and Terminals on PSU Rear Panel 
DESIGNATION FUNCTION 
Note: Refer to Figure 2.09. _ - 
Jl AC power input (AC#O IN) for distribution to PSU Power Supply Board, LTU Shelf power supplies, 
and -48PS0 if system consists of Basic Cabinet only 
J2 AC power input (AC#l IN) to -48PS0 and -48PSl in systems consisting of Basic and Expansion 
Cabinets. Otherwise, provides jumper plug connection for routing ac power to -48PS0 via...

e  

SATURN IIE EPABX 
Maintenance and Troubleshooting 
I 
- 
A30808-X5130-DllO-l-6920 
Issue 1, May 1986 
1. Front Panel Fuses, Controls, and Indicators. The 
following are mounted on or visible through open- 
ings in the PSU front panel: 
l Fuses for all -48Vdc and ringing (RACIRMW) 
voltages to the Basic and optional LTU Shelves 
(part of Circuit Breaker Panel) 
l Circuit breakers for ac inputs to all system pow- 
er supplies (part of Circuit Breaker Panel) 
l MAJOR (red) and MINOR (yellow) alarm 
(ALARMS)...

SATURN IIE EPABX 
Maintenance and Troubleshooting 
A failure in the fuse alarm detect circuit may 
cause spurious fuse alarm (FUSA+) signals or 
prevent a fuse alarm signal, depending on the 
nature of the fault. A spurious fuse alarm may 
occur due to a disconnected cable from J12 of 
the PSU module to the basic shelf as well as 
a fault in the CIOP PCB. 
If a fuse is blown but no fuse alarm is indicat- 
ed, the fault could be in the fuse alarm detect 
circuit in the PSU Control Logic Board or cir-...

SATURN HE EPABX 
Maintenance and Troubleshooting 
RAC/RMW 
SIGNAL 
90 VOLTS RMS, 20 HZ 
RAC 0 
RAC 1 
97 VOLTS DC 
RMW. 
TIME SCALE IN SECONDS 
Figure 2.12 RAClRMW Signals 
2-24  

SATURN IIE EPABX A30808-X5130-DllO-l-8920 
Maintenance and Troubleshooting issue 1, May 1986 
Both normally closed and normally open con- 
tact arrangements are provided for failure trans- 
fer 
and .for major alarm and minor alarm 
outputs to allow use of external equipment 
responding to either arrangement. Connections 
are normally made to the MDF for distribution 
of the failure transfer, major alarm, and minor 
alarm functions. 
The relay contacts connected to J13 will give 
an output status for the...