Programming instructions

12 Designer’s Guide
Calsense
24 Volt AC Power Consumption
The power consumption of the 24 VAC power supplied to the controller by the transformer from the 120
VAC power line is 0.30A for each solenoid valve that is on, as well as an additional 0.30A while the
backlight is on (Table 1
). The backlight remains on for 10 minutes after a day is pressed on the controller.
11.6 Volt AC Power Consumption
The power consumption of the 11.6 VAC power supplied to the controller by the transformer from the
120 VAC power line is 0.170A stand by, and 0.225A while watering. The hardwire communication option
(model -M) consumes an additional 0.120A at all times. The phone modem option (model -R) consumes
an additional 0.270A at all times.
24 VAC Loading Examples
The following table provides loading examples with remote control valves and relays. The total load must
never exceed 1.50A. Some solenoids may draw more or less than the 0.30A used in the example.
Notes
Any single output may be loaded to 1.5A
The total load of all outputs must not exceed 1.5A
If using this information for sizing a solar panel, allow a margin of 20% (1.2 times current in above
tables) for transformer efficiency.
ET2000e -EN -WEN -GR -R -FOM -LR -SR -M
Idle 6.30 1.50 1.90 2.90 1.10 -- 1.80 1.00 0.50
w/ Backlight 10.50 1.50 1.90 2.90 1.10 -- 1.80 1.00 0.50
Transmitting 10.50 1.90 3.10 4.00 1.30 -- 3.10 2.20 1.10
Table 1: 120 Volt AC Power Consumption Chart in Watt hours
Station
(solenoid)
Station
(solenoid)
Station
(solenoid)
Master Valve
(solenoid)
Pump (relay) Total
Case 1 0.30A -- -- 0.30A 0.20A 0.80A
Case 2 0.30A 0.30A -- 0.30A 0.20A 1.10A
Case 3 0.30A 0.30A 0.30A 0.30A 0.20A 1.40A
Table 2: 24 VAC Loading Examples