Parker 590 series - Page 217

Standard and Optional Equipment 13-9
590 Series DC Digital Converter
A+
L1 L2
L3
A-
TH10TH1 TH3
TH6TH7TH4
FS2 FS3 FS4
F+
F-
ACCT. PRESENT
12
3
4
5
6
7
8
G1 K1
VDR1
VDR2
VDR3
ACCT.
0VL
PL K
D4
D3
OR
BK
RD
YL
F12
11
10
KG1G2
FIELD REGULATOR
FIRING CIRCUITS
PLP
PLR
F16
F8
INTERMEDIATE
CONNECTION FOR
INT FIELD WIRING
F16A
F8A
D2
D1
EXT. FIELD
AC SUPPLY
EXT.A+
A+
L1
L2L3
A-
EXT.A-
SUPPRESSION
BOARD
AH 386001
POWER
BOARD
AH385621
TH4 Y & R TH6 Y & R TH2 Y & R
UPPER
HEAT
SINK
A-
R
Y
CA
LOWER
HEAT
SINK
A+
AH055036 U002
TRIGGER BOARD
SHOWING GATE/CATHODE
CONNECTOR POSITIONS
kg
TH7
TH4
TH9
TH6
TH11
TH2
TH12 TH9
TH5 TH2
TH8 TH11
FIELD
CURRENT
CT
gk
TH1
TH10
TH3
TH12
TH5
TH8
R
O
CA
TH7 O & R TH9 O & R TH11 O & R TH1 Y & R TH3 Y & R TH5 Y & R
TH10 O & R TH12 O & R TH8 O & R
R
O
CA
R
Y
CA
FORWARD STACK GATE LEADS RED & YELLOW
REVERSE STACK GATE LEADS RED & ORANGE
TH1 TH10 TH3 TH12 TH5 TH8
TH7 TH4 TH9 TH6 TH11 TH12
Figure 0-9 4 Quad Power Circuit - 451-720A Models using AH385621U001