Clear, Contact specifications, Derated to 0.7 a at 185°f (85°c) – DAVIS WeatherLink for Alarm Output Add. User Manual

Page 16: On resistance: 0.12 ohm, maximum

Product Numbers: 6544 WeatherLink for Alarm Output
Document Number: 07395.219 Rev. D 10/10/11

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and Weather Envoy™ are trade-

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Clear
Press the Clear button to clear the alarms for this output only. This func-

tion clears both the dialog box entries and the settings in the data logger.
You must press this button for each of the individual outputs you want to
clear.

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 console or Envoy), the data logger will briefly test all four outputs

by closing the circuit (turning on the output). It is recommended that you disconnect any equip-
ment attached to the data logger outputs before rebooting the console or Envoy.