WELCOM-250Y, Z
MAINTENANCE MANUAL
CHOWEL
- 28 -
3-14 Circuit diagram for WELCOM-250Y, Z(3/4)
CN8
PS-40PE-D
4T
1-LP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
+
C
36
16V470U
/X
IN
-03
N
L31
0.
1U
U
28C
A
74LS00
9
10
8
N
L36
0.
1U
R1
R2
R3
R4
RN6
R
GLD
4Y
102J
1
2
3
4
5
6
7
8
/X
IN
-01
U
288A
74H
C
00
4
5
6
PR
S-D
B0
/X
IN
-05
R
125
1/
4W
22
PR
ESS-R
EAD
P-W
AVE
R
EF
N
L18
0.
1U
C
T
2B-I
N
AB1
SY
N
C
-I
N
V-D
R
OP
D
ET
EC
T
PS-50PE-D
4T
1-LP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Z
D
16
AD
6
.
2J
SA
R
121
10K
/PI
N
1
VC
C
R
EF
2
U
PC
1093
J
P6
GN
D
RN7
R
GLD
8X
472
2
3
4
5
6
7
8
1
9
PR
S-C
OM
/I
N
-10
N
L20
0.
1U
C
35
500v
0.
01u
+
C
27
25V220U
D
B0
VC
C
+
C
30
50V2200U
U
28D
A
74LS00
12
13
11
/I
N
-07
AD
IN
C
25
470P
/U
S0
N
L22
0.
1U
D
63
1S1588
Z
D
13
AD
6
.
2J
SA
/I
N
-04
U
42
M
C
34050
1
2
7
6
13
14
11
10
3
5
4
15
9
12
R
1-
R
1+
R
2-
R
2+
D
1-
D
1+
D
2-
D
2+
R
10
R
20
R
EN
D
1I
D
2I
D
EN
/SW
-1
VC
C
/X
IN
-09
D
B3
N
L23
0.
1U
R
123
1K
N
L39
0.
1U
/I
N
-01
C
OM
-T
X
A1
J
P10
-15V
+
15V
+
C
34
50V22U
/U
S3
R
129
10K
N
L34
0.
1U
N
L33
0.
1U
X
OU
T
-11-2
trigger
N
L30
0.
1U
N
L35
0.
1U
C
T
2D
-I
N
SW
1
M
S-830-168
X
OU
T
-09
/R
T
S0
+
-
~
~
D
S2
W
O2M
CN6
5045-02A
1
2
VC
C
R
127
10K
/X
IN
-06
X
OU
T
-07
N
L27
0.
1U
/SC
R
T
R
G
R
124
1/
2W
3.
3K
CN1
171363-1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X
OU
T
-04
for input circuit DC valve
N
L19
0.
1U
+
C
28
25V220U
24P
PR
ESS-B
D
B7
C
T
1-I
N
/SW
-8
PR
S-D
B4
VC
C
R
133
10K
S-W
AVE
24N
pressure controller power
RN8
R
GLD
8X
472
2
3
4
5
6
7
8
1
9
PR
S-D
B6
PR
S-D
B5
R
EF
VR
4
2K
/X
IN
-02
D
B2
J
P7
GN
D
/PI
N
4
PC
-705A
V1.
0
PH
ASE
2
A2
3
4
T
hurs
day
,
J
une
24,
2004
T
it
le
Siz
e
D
oc
um
ent
N
um
ber
R
ev
D
at
e:
Sheet
of
J
P8
VC
C
/PI
N
0
0V
R
122
47K
C
T
2A-I
N
for voltage drop detect
W
ELD
-SEQ
/I
N
-09
/I
OW
R
X
A0
T
R
12
IR
F
D
120
-15V
+
C
31
50V2200U
N
L32
0.
1U
/I
N
-06
+
-
~
~
D
S1
W
O2M
+
C
29
50V2200U
AC
100V-2
+
C
33
25V470U
24N
/I
N
-03
function select
Z
D
14
AD
6
.
2J
SA
/I
N
-00
VC
C
C
ON
V2
Z
W
1R
50515
1
2
3
4
5
6
+
IN
-I
N
+V
C
OM
-V
C
ASE
U
S2
trigger
D
62
1S1588
N
L29
0.
1U
C
OM
-T
X
EN
O
VC
C
/X
IN
-08
D
B6
+
C
32
50V2200U
Multi Purpose Port
for optional
unit
X
OU
T
-11-1
D
B1
C
T
2C
-I
N
N
L38
0.
1U
X
OU
T
-08-2
P-C
Y
C
LE
CN5
PS-20PE-D
4T
1-LP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
N
L26
0.
1U
X
OU
T
-06
/X
IN
-09
/SW
-3
N
L25
0.
1U
for pressure controller/reader option
RN5
R
GLD
4X
104J
2
3
4
5
1
R
X
A1
N
L24
0.
1U
R
131
1.
6K
/X
IN
-04
PR
ESS-D
to/from contactor
C
ON
V3
Y
D
S-212
1
2
3
4
5
6
IN
GN
D
+
A
C
ASE
C
ASE
C
ON
V1
Y
D
S-212
1
2
3
4
5
6
IN
GN
D
+
A
C
ASE
C
ASE
/W
AI
T
R
132
1/
2W
1M
PR
S-D
B2
VC
C
R
126
3.
3K
PR
ESS-A
PR
S-D
B3
serial ch. 1
VC
C
E24P
to/from external
R
130
10K
RN9
R
GLD
4X
103J
2
3
4
5
1
PR
S-D
B7
T
X
A0
+
24V
/PI
N
3
R
ESET
D
B5
N
L28
0.
1U
PC
13
PC
-816
1
2
3
4
/I
OR
for T/B interface
/I
N
-11
/I
N
-08
-15V
R
128
10K
/X
IN
-10
AC
100V-1
C
OM
-T
X
EN
1
+
15V
N
L21
0.
1U
/I
N
-05
U
43
M
C
34050
1
2
7
6
13
14
11
10
3
5
4
15
9
12
R
1-
R
1+
R
2-
R
2+
D
1-
D
1+
D
2-
D
2+
R
10
R
20
R
EN
D
1I
D
2I
D
EN
T/B power (+11v 0.5A MAX)
/I
N
-02
U
S1
C
LK
R
119
470
F2
1.
0A
+
15V
C
24
470P
/X
IN
-11
/SW
-2
for digital c5V 0.6A max)
VC
C
/X
IN
-07
X
OU
T
-C
OM
/D
R
-T
M
G
AB0
T
X
A1
X
OU
T
-10
/X
IN
-00
R
120
470
Z
D
15
AD
6
.
2J
SA
X
OU
T
-08-1
N
L37
0.
1U
-15V
VC
C
9-17: SCR thrmo
7-15: trigger output
6-14: primary CT coil
4-13: AC15V sync. signal
3-12: AC16V 1.5A power
2-11: AC20V 1A power
1-10: AC100V 1A power
J
P9
+
15V
U
10F
A
74H
C
14
13
12
X
OU
T
-05
D
B4
PR
ESS-C
IRQ
CN2
PS-20PE-D
4T
1-LP1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+
C
26
16V470U
C
OM
-T
X
A0
PR
S-D
B1
Summary of Contents for WELCOM-250Y
Page 16: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 16 3 2 Layout diagram for WELCOM 250Z...
Page 17: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 17 3 3 Timer unit and I O display...
Page 18: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 18 3 4 Electrical connection for WELCOM 250Y...
Page 19: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 19 3 5 Electrical connection for WELCOM 250Z...
Page 20: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 20 3 6 Connection diagram for WELCOM 250Y timer unit...
Page 21: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 21 3 7 Connection diagram for WELCOM 250Z timer unit...
Page 23: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 23 3 9 Harness diagram for WELCOM 250Y...
Page 24: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 24 3 10 Harness diagram for WELCOM 250Z...
Page 30: ...WELCOM 250Y Z MAINTENANCE MANUAL CHOWEL 30 3 16 Circuit diagram for firing PCB...
