valutazioni - 4, GPA: 4.3
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Facilità d'uso
Each transmitter can perform many remote switching tasks and are typically used in wireless/hardwire security systems. Each unit is powered by a self-contained 9-volt battery and can be connected to various sensors with the built-in screw terminals. NOTE: Transmitters with a /K model number suffix are Linear’s Canadian models tuned to 318 MHz. These instructions pertain to both the /K and standard 303.875 MHz U.S. models. D-21A N/O TRANSMITTER The D-21A is used with various types of security sensors that are normally open (magnetic contacts, security floor mats, etc.). The D-21A transmits a signal when the sensor circuit closes. The transmitter triggers instantly, and may be re-triggered after a 30-second reset time. A pushbutton is provided for battery/test. Pressing the pushbutton with the sensor circuit open (after the 30-second reset) triggers the transmitter and turns on the battery is above 7.5 volts. D-24A N/C TRANSMITTER The D-24A is used sensors that are normally closed (magnetic contacts, security window The D-24A transmits circuit opens. The transmitter incorporates a time delay of 1 to 3 seconds, ensuring that the sensor circuit must be continuously open for at least 1 second before the D-24A will transmit. This feature helps prevent activation from short-term, spurious signals, and from signals made from outside electromagnetic sources. The transmitter may be re-triggered after a 30-second reset time. The transmitter has a pushbutton for battery/transmission test. NOTE: On the D-24A, the loop input terminals must be closed for a minimum of 45 seconds before the pushbutton will activate the transmitter. D-26A N/O TIME-DELAY TRANSMITTER The D-26A is used with various types of security sensors that are normally open. The special-purpose D-26A transmitter has a built-in exit/entry time delay. The timer starts when the sensor circuit closes. It begins a 5 to 10 second countdown. If no action is taken before the time delay is completed, the transmitter will send an alarm signal to its companion receiver. Pressing the pushbutton before the time delay period has elapsed will prevent signal transmission. In addition to canceling time-delayed signal transmission, the pushbutton is used the battery. Pressing the button turns on the red LED if the battery is in good condition. The LED does not light upon transmission. NOTE: The each transmitter contains a timing circuit that allows a single of a 2-second duration to occur, followed by a 30-second reset time. This means of the number transmitter is triggered, it will not send often than once every 30 seconds. CODE SWITCH LOCATION The digital coding switch is attached to the circuit board inside the case. To access the switch, unsnap and slide off the back cover as shown in Figure 1, exposing the battery, lead wire screw terminals, and digital coding switch (see Figure 2). Figure 1. Removing the Transmitter Back Cover SCREW TERMINALS CODING SWITCH Figure 2. 9- VOLT BATTERY Transmitter Components C...
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