Linear D-21A Normally Open Wall-mount Transmitter

The Model D-21A Normally Open Wall-mount Transmitter has a normally open input circuit that operates in conjunction with an externally mounted normally open magnetic or mechanical contact. When the external contact closes, the transmitter automatically transmits a two-second digitally coded signal to a companion standard digital receiver. Pressing the test pushbutton on the front of the transmitter will also cause the transmitter to send a signal. Each transmission causes the red LED indicator on the front of the transmitter to light, showing that the transmitter is sending a signal and that the battery is in good condition.

Features

• Slimline case design
• Test/operate switch
• Test/operate LED
• 2-second transmission
• Standard digital format: 256 selectable codes
• One N/O input loop circuit
• Loop input screw terminals
• Powered by one 9-volt battery (included)
• Current consumption: 12 mA transmitting
• RF frequency: 303.875 MHz
• 2.4" W x 4.7" H x 0.9" D
• Order number: SNT00004