11
Date: 2022-04-20-v1
Dwg. No.:
TH-4000-PCB
TH-4000 CIRCUIT BOARD MB124
MB
124
“2
IN
/ 2
OUT
/ 2
RE
L
A
Y
”
B
OA
R
D
MB12
4
V+
V-
AI
2
V-
AI
1
V+
V+
AO
1
V-
AO
2
CO
1
NO
1
Rela
y
1
(NC1
–
Normally Cl
o
sed)
(CO
1
–
Common)
(NO
1
–
Normally O
pe
n)
NC1
CO
2
NO
2
Rela
y
2
(NC2
–
Normally Cl
o
sed)
(CO
2
–
Common)
(NO
2
–
Normally O
pe
n)
NC2
Analo
g
Output 1
& 2
(A
O
1 /
V
-)
(A
O
2 /
V
-)
Turbi
d
ity Se
nsor
(Whit
e
–
AI
1)
(Red
–
V+
)
(Green &
B
lac
k
–
V-)
FIGURE 4: TH-4000 Circuit Board MB124
