IPS Controllers M820 - Electrical Descriptions; Power and Dip Switch Settings

i. External audible/visible alarm (oponal)
j. pH sensor - BNC connecon
k. ORP sensor - BNC connecon
l. Oponal dry contact ORP1 output (contact factory for
instrucons)
F. Electrical Descripons
1. Power
a. 120 VAC, 50-60 Hz, 3-wire grounded NEMA 5 power cord.
GFCI source required. Note: For 240 VAC, a hardwire
connecon is required. Use only 18AWG stranded copper
wire. The controller’s power supply will automacally
detect the incoming power and will output the same
power to your devices. All output devices (feeders) must
match incoming voltage.
2. Dip Switches (1-4)
1: pH/ORP interlock (default: OFF)
• No ORP1 or ORP2 feed if pH is feeding (ON).
2: pH/ORP alert interlock (default: ON)
• No ORP1 or ORP2 feed if pH is in alert mode (ON).
• No interlock (OFF)
3: Acid/Base default acid (default: OFF)
• Feed base chemical when pH level falls below set
point. (ON)
• Feed acid chemical when pH above set point. (OFF)
4: Not in use.
Figure 3: Dipswitches
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M820 pH/Dual ORP Controller Owner’s Manual