WIRING GUIDE
The S1 and S2 output provide switched 240VAC. Pumps or solenoid
valves are directly connected to the 3 way terminal with active neutral and
earth. S3 and S4 have potential free contacts (NO, C, NC) to use with
either low voltage devices or as a digital switch into a central monitor
system.
A 240VAC terminal adjacent to S3 and S4 however make wiring easy
if a 240VAC device is used.
(See Fig.23)
P1 and P2 are contact closure outputs and polarity does not have to be
observed when connecting a metering pump. Max ratings are 100V and
30mA. Never connect 240VAC to the pulse output. Instant permanent
damage will occur!
Polarity has to be observed when connecting the 4-20mA current
output. A TP-150 temperature electrode connected will enable automatic
compensation for pH. S3 and S4 can now be connected to a heater
(etc)
for temperature control.
.1/ ! Wiring optionsfor the DPH-64.
DPH-64 Instruction manual
PAGE 23
