Davis WeatherLink Irrigation Add. User Manual download pdf (Page 13)

Contact Specifications

The “contact” closure is provided by a photo-coupled MOS device. Because

it is a solid-state device, it is not subject to arcing and contact-welding as are

mechanical relays. However, since it is a solid-state device, it will be

damaged by operation beyond its ratings, which are:

Nominal Load Voltage: 28 V AC or 48 V DC, Maximum

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)

ON Resistance: 0.12 Ohm, Maximum

Note: Upon power up (powering the Vantage Pro Console™ or Weather

Envoy™), the datalogger will briefly test all four outputs by closing the

circuit (turning on the output). It is recommended that you disconnect any

equipment attached to the datalogger outputs before rebooting the Vantage

Pro Console™ or Weather Envoy™.

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Davis WeatherLink Irrigation Add. User Manual Page 13