Wiring To Dosing Systems - Blue I HydroGuard HG-302 Manual De Uso

3.4.4 Wiring to Dosing Systems

HydroGuard controls chemical dosing systems using a series of electronic relays that start and stop the
dosing pumps. Each relay opens and closes a switch that activates a separate pump or piece of equipment.
J16 J2
C NC NO
CL1
HYDROGUARD HG-302
I/O-MODULE
CL1
Power Supply
Line (black or brown)
Neutral (white or blue)
Ground (green or green/yellow)
J6 J11 J17
C NC NO
C NC NO
C NC NO
CL2 PH NTU
PH NTU
CL2
CONTROL OUTPUT
Figure 8: Skematic of I/O Board
Dependent
Relay Power
Main
Power
Figure 9: Example of Wiring Configuration
J7 J3
C NC NO C NC NO
ALARM TEMP
ALARM TEMP
SWITCH 1
Cl Pump
16
J4 J5 J8
1 2 3 4 5 6
INPUT
SWITCH 2
INPUT
FLOW METER
FREQUENCY INPUT
pH Pump