Alstom SHPM 101 - Zone 1;Zone 2 Comparators

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 13 of 71
Figure 13: Zone 1/Zone 2 comparators (MHO version)
MCK/5
–I
A
Z
PH
–I
B
Z
PH
–I
C
Z
PH
VmA
VmB
VmC
Memory
enabled
Memory
selector
V
A
V
B
V
C
Signal
common
Z1/Z2
polarising
+12V
+5V
0V
–12V
Main clock
100 – 8kHz
@ 50Hz
120 – 96kHz
@ 50Hz
+6
+8
+5
LD alarm
Clock
monitor
circuit
I n alarm
MCK/6
MCK/8
MCK
Pole dead ‘A’
Pole dead ‘B’
Pole dead ‘C’
Power swing block Z1
Power swing block Z1
Self check
Master reset/invert
Disable characters
(V – I Z)AZ1
A1
B1
DA1
DB1
A2
B2
Out 1
Dout 1
Out 2
INH4
INH3
Comparator
or AZ1
Comparator
or ABZ1
(V – I Z)ABZ1
(V – I Z)AZ2
A1
B1
DA1
DB1
A2
B2
Out 1
Out 1
Out 2
INH4
INH3
Comparator
or AZ2
Comparator
or ABZ2
(V – I Z)ABZ2
I
AB
Z
PH
(V – I Z)BZ1
A1
B1
DA1
DB1
A2
B2
Out 1
Dout 1
Out 2
INH4
INH3
Comparator
or BZ1
Comparator
or BCZ1
(V – I Z)BCZ1
(V – I Z)BZ2
A1
B1
DA1
DB1
A2
B2
Out 1
Dout 1
Out 2
INH4
INH3
Comparator
or BZ2
Comparator
or BCZ2
(V – I Z)BCZ2
I
BC
Z
PH
(V – I Z)C
Z1 1RC
A1
B1
DA1
DB1
A2
B2
Out 1
Dout 1
Out 2
INH4
INH3
Comparator
or CZ1
Comparator
or CAZ1
(V – I Z)ABZ2
(V – I Z)CZ2
A1
B1
DA1
DB1
A2
B2
Out 1
Dout 1
Out 2
INH4
INH3
Comparator
or CZ2
Comparator
or CAZ2
(V – I Z)CAZ2
I
CA
Z
PH
Inhibits and control