15
Pump(s)
Alarm
L1
L2/N
L2
L2
L2
L2
L2
L2
BLEED
N.C.
N.O.
N.C.
BOI 1
N.O.
N.C.
FEED
N.C.
BIO 2
N.O.
N.C.
N.O.
N.O.
ALARM
N.C.
N.O.
L2/N
L2/N
L2/N
L2/N
L2/N
L2/N
CTRL 1
+
-
N.C.
CTRL 3
-
+
CTRL 2
N.C.
CTRL 4
N.O.
N.C.
N.O.
N.O.
ALARM
N.C.
N.O.
GROUND
STUD
Chart
Recorder
IN+
IN
-
+5V
-5
V
IN
-
DI
G I
N
2
DIG
IN 3
IN
+
IN
-
DI
G
IN
1
IN
+
IN
-
IN
+
DI
G
IN
4
IN
+
IN
-
D
IG IN
5
IN
+
IN
-
F1
PLC
BLK 120V
BRN
24
0V
GRN 120V
GRN/YEL 240V
WHT 120V
BLU 240V
FUSED
EXTERNAL
POWER
SOURCE
GRN 120V
GRN/YEL 240V
W
H
T
120V
BLU 240V
BLK 1
20V
BR
N
24
0
V
FUSED EXTERNAL
POWER SOURCE
Note: CTRL 3, CTRL 4 and Alarm are dry
contact relays (polarity not critical).
Note: The Alarm relay is not programmable.
Refer to the Main Menu diagram for the list of
error conditions that trigger the Alarm relay.
EXTERNAL
AC POWER
EXTERNAL
AC POWER
Note: Wire “COM” terminal of the external
control input of the pump to the “negative”
terminal of the controller.
Figure 4b WPH/WDP420 Outputs
