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8.2.5 Voltage Sense and Power Fault
Display
4Vd c
60
Hz
+5
Vdc
200,208,
-5
Vdc
230
Vac
Ferro
Multi-
Voltage
+6
Vdc
Trans-
level
Sense
50
Hz
Former
Filter
+8.5
Vdc
Assembly
200,220,
f--
Assembly
+12
Vdc
235
Vac
-12
Vdc
+24
Vdc
Dual
Voltage
' - - -
Level
Sense
Filter
Assembly
Assembly
-24
Vdc
llf the voltage level that causes a fault is near the trip
point of the respective monitoring circuit, the specific
voltage level at fault is not indicated; only the type of
failure and the failing supply are indicated.
2
A previous power fault indication of
1111 1111
might
be indicated when the mainline switch is switched
from off to on.
3
'f power is up when a short occurs in the
+24
Vdc
distribution, the fault indications are as shown in the
chart. If the short exists when power is brought up,
an undervoltage indication will probably occur.
4The indication refers to the
+24
Vdc or
-24
Vdc. No error indication for the
48
Vac errors.
+48
Vac
8-18
Present
Fault
f-----
Multilevel
Bits
0, 1,
4-7
f - - -
Power Off
Present
and
Previous
Power
Press Reset Key
Power
OR
1 - - -
Fault
Fault
Latch
Latch
Bits
0-7
Bits
0-7
2
I
\
/
I
I
\
I
\
I
I
/
PWR
/
r
WR
FAULT DPLY
~TDPLY
rp;ev-
4
Prev
IQ
I
Pres
' - - -
o
1
Display I ndicators
~
0
0
8
4
~/
/
2
o
2
.;"
Failure
Bi~
. . . . . . /
/'
Fail ing Supply
~
C O d e / /
Bit Code
01 -
Undervoltage
10 -
Overvoltage
11 - Overcurrent
01 -
Multilevel Filter
Assembly
11 -
Dual Level Filter
Assembly4
DPLY \
PWR CHK \
3
4
o
0
1
8
5
6
o
0
4
2
e
Pres
I
7
0
o
0
1
8
1
2
o
0
4
2
o
P
3
4
5
o
0
0
1
8
4
~
~,
l \
Failing Voltage
-~
6
o
2
7
o
1
I \
Level Bit Code
~
r---------------------------------~~
\
\
--==-:.::
0000
1
0001
0010
0011
0100
0101
0110
0111
1000
1001
-4
Vdc
+5
Vdc
-5
Vdc
+6
Vdc
+8.5
Vdc
+12
Vdc
-12
Vdc
+24
Vdc
3
-24
Vdc
1111 -
Plus and minus
24
Vdc failing on
dual level filter assembly of
+5
Vdc,
+8.5
Vdc, and
-12
Vdc failing
on multilevel filter assembly.
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