Walchem WebMaster ONE Instruction Manual page 26

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