DAVIS Alarm Output Module - Manual (Page 6)

Page 6 Alarm Output Module
Available Outputs
The AOM provides four output contacts which may be selected from the condi-
tions listed below. Each output (except time, daily ET, and the “User” outputs)
remains active as longs as the alarm condition exists. The time and daily ET
outputs remain active for one minute. The “User” outputs must be activated
and deactivated by the user via the WeatherLink Software for that station. Also
shown in the table below are the pin assignments for each of the three consoles.
The “Radio Power” output is used to control switching of power to radio when
in the power-conserving mode (see “AOM Connections for Radio Power-Con-
serving Options” on page 12).
Contact Specifications
The “contact” closure is provided by a photo-coupled MOS device. Because it
is a solid-state device, it is not subject, as long as the load conditions are within
specification, to arcing and contact-welding as are mechanical relays. The Con-
trol Output and Status contacts are rated as follows:
A LARM S IGNAL P IN A SSIGNMENTS (J3)
A LARM
O UTPUT
J3
P IN
G RO W EATHER
C ONSOLE
E NERGY EM
C ONSOLE
H EALTH EM
C ONSOLE
16 Time Time Air Temp-Low
15 Daily ET Temp-Hum Index Air Temp-High
14 Dew Point Dew Point Inside Temp-Low
13 Radio Power Radio Power Inside Temp-High
12 Hum-Low Air Temp-Low Outside Hum-Low
11 Hum-High Air Temp-High Outside Hum-High
10 Air Temp-Low Hum-Low Inside Hum-Low
9 Air Temp-High Hum-High Inside Hum-High
8 Soil Temp-Low Wind Chill UV Dose
7 Soil Temp-High Wind Speed Outside Temp-Hum Index
6 User 1 User 1 Wind Speed
5 Temp-Hum Index Daily Rain Temp-Hum-Sun-Wind Index
4 Wind Chill Not Used Daily Rain
3 Wind Speed Not Used Inside Temp-Hum Index
2 User 2 User 2 Wind Chill
1 Daily Rain Barometer UV Index
Nominal Load Voltage: 28V AC or 48V DC, Maximum
Peak Voltage: ±100 V, Maximum
Load Current ±300 mA, Maximum at 77° F (25° C),
derated to 150mA at 176° F (80° C)
ON Resistance 4 Ohms, Maximum