22
Figure 5: Wiring Diagram for Sensor Inputs and Digital Inputs A-F
T-
T+
IN
-
IN+
+5
-5
Low Pressure
pH/ORP OR
CONDUCTIVITY
SENSOR
SHIELD
TO GND STUD
BLU
WHT/BLU
ORN
WHT/ORN
GRN
WHT/GRN
T-
T+
IN-
IN+
+5
-5
BLU
WHT/BLU
ORN
WHT/ORN
GRN
WHT/GRN
High Pressure
Conductivity
Electrode
-T -T +T +T -
+ -S +S -5 +5
WH
T
GR
N
BL
K
RE
D
Shield
(Drain wire)
to GND
stud on
front
panel
DIGITAL
INPUT A
DIGITAL
INPUT B
DIGITAL
INPUT C
RELAY, REED SWITCH
WATERMETER-CONTACTOR
HALL EFFECT
WATERMETER
OR
PADDLEWHEEL
SI
G
N
A
L
+
SIGN
AL
-
DETAIL "A"
IN+
IN-
IN+
IN-
IN+
IN-
POWERED
DEVICES
UNPOWERED
DEVICES
OR*
* Either an unpowered or a powered device may be
connected to each digital input, one device per input.
DIGITAL INPUTS
SEE DETAIL 'A'
SENSOR 1**
SEE DETAIL 'C'
SENSOR 2 or 4
(Observe markings
on circuit board)
SEE DETAIL 'C'
SENSOR 3
SEE DETAIL 'C'
SENSOR 4 or 2
(Observe markings
on circuit board)
SEE DETAIL 'C'
B1
t- t+
IN- IN++5
V -5
V
1
0283
9
REV 2
t-
t+
IN- I
N
++5
V -5
V
1
0
283
9
REV 2
t- t+
IN- IN++5
V -5
V
1
0283
9
REV 2
DIGITAL
INPUT D
IN+
IN-
DIGITAL
INPUT E
IN+
IN-
DIGITAL
INPUT F
IN+
IN-
12V
12V
OR
SHIELD
(TO GROUND
STUD)
GROUND/SHIELD
TO GROUND STUD
INSIDE ENCLOSURE
TC+ TC- TC
GND
TC+ TC- GND
TC
High Pressure
pH/ORP Sensor
OPTIONAL TEMPERATURE
COMPENSATION (pH ONLY)
GROUND
PREAMPLIFIER
+5V -5V COM VpH
BLU
WHT/BLU
ORN
WHT/ORN
GRN
WHT/GRN
SENSOR DETAIL "C"
t-
t+ I
N
-
IN+
+
5
V
-5
V
** Please note: Sensor 1 terminal
block is oriented OPPOSITE of
sensors 2-4.
t-
t+ IN
- I
N
+ +
5
V -
5
V
Sensor 1
Terminal
Block
T- T+ IN- IN+ +5 -5
DISINFECTION
SENSOR
SHIELD
TO GND STUD
RE
D
BL
AC
K
GR
N
WHT
SENSOR
DETAIL "C"