Product specifications

5-7
WeatherLink
ET pulse output, the Rain - ET algorithm uses this information. More information is provided below.
• Relays: You may need to obtain your own relays in order to switch equipment at voltages higher than 28 volts or
power levels above 10 Watts.
Note: An industrial controller can also be connected to the Alarm Output on the irrigation data logger if you want the irrigation system to also be suspended
due to cold temperatures.
Note: A residential controller may be connected in series to both the ET and Alarm outputs on the Irrigation data logger if you want the irrigation system to
also be suspended due to high winds or cold temperatures in addition to the Rain-ET balance.
Caution: The Alarm Output Module is not suitable for any use in which the health or safety of any person or the value or protection
of valuable property is dependent on the operation of the streaming data logger.
Function Specification
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to 140°F (-40° to 60°C)
Output Contact Closures . . . . . . . . . . . . . . . . . . . . . . . . . 4: Wind, Rain, ET & Alarm Contact Specifications, Terminal Block with
stainless steel cage clamp screw terminals.
Each of the four output contacts is rated as follows:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Photo-coupled MOS FET
Load Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28VAC or 48VDC
Peak Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 60 V, maximum
Load Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 1.8 A, continuous Maximum at 77°F (25°C), derated to 0.7 A at 185°F,
(85°C)
Peak Load Current . . . . . . . . . . . . . . . . . . . . . . . . . . 6 A for 100 msec., maximum
ON Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.12 Ohms, maximum
OFF Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 uA, maximum
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . 550 mW, maximum
Output Contact Closure Functions:
Wind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per 1 mph in 2 seconds. Frequency in Hz is half the wind speed
in mph
Rain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per tip of the rain bucket. Depends upon rain collector type
setting in console (0.01" or 0.2 mm)
ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per 0.01" in Industrial mode only; acts as an alarm in
Residential mode (see below) only
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Triggers on any active alarm set on the Vantage Pro or Pro2 console/
Envoy. Functions according to settings listed below:
Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 255 minutes (user selectable). Determines how long the alarm
output should stay active once it is triggered. Default = 10 minutes
Reactivation . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 255 minutes (user selectable). Determines how long to leave the
alarm output deactivated once it is deactivated. Default = 0.
Pulse Width. . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 9999 milliseconds (user selectable). Default = 2000 milliseconds
(2 seconds).
Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous or Pulse (1-time) (user selectable). Determines whether a
pulse for alarm activation is continuous throughout the activation time
or a one time pulse. Pulsed relay oriented devices will require the one-
time pulse. Default = Continuous
Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normally Open or Normally Closed (user-selectable). Determines
whether the circuit stays open or closed when no alarms are active. The
opposite behavior occurs for an active alarm condition. Normally
Closed is the most typical operation for Irrigation controller use.
Default = Normally Closed.
Test Mode Function . . . . . . . . . . . . . . . . . . . . Available. Continuous, Open, or Closed circuit (user-selectable).
Residential Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Used with a Residential Irrigation System Controller to inhibit the
watering cycle. This type of sprinkler controller will be what is typically
installed by most homeowners and will have inputs for a Common and
in many cases a Rain Sensor. The following functions are available for
this mode only: