DW101A Door/Window Transmitters
The DW-101A is primarily designed for monitoring doors and windows and any detector device having normally open or normally closed contacts or a voltage output which switches between 0 and 9 Volts minimum. The DW-101A transmits a pulsed code with the code combinations factory preset to one of 65,000 possible combinations. Powered by long life lithium batteries, the battery status is transmitted to the receiver each time the transmitter is activated. The batteries are easily replaced if necessary. Packaged in a heavy duty case it can be sealed against moisture. When sealed the transmitter can be used outdoors within moderate temperature ranges.
Use the part no.'s below when making purchase orders to Alarm Electronics. Please see the Sales page for terms.
- DW-101A (Door/Window Transmitter)
- Operating Frequency - 300mhz
- Input - 2 Terminal N/O or N/C, internal reed switch with magnet (N/C)
- Transit Time - 1 Second
- Reset Time - 1 Second
- Input Trigger Time (N/O) Input - 10ms min.
- Input Trigger Time (N/C) input - 400ms min.
- Min. Voltage Trigger - 4 volts @ Tr = 0.1 sec 1
- Battery - 3 cells CR1220 Lithium
- Battery Life - 5 to 10 years
- Battery Life (operational) - 50,000 operations
- Size - 2.5" x 1.3" x 0.65"
- Color - Neutral White
Battery Life and Status
Replacement batteries are available from many industrial electronics suppliers or from Alarm Electronics Mfg. Co., Inc. Battery life is dependent on both the method of input and operation. When the transmitter is operated with N/O input and seldom used, the battery life is primarily the shelf life of the lithium cells which lose approximately 1% to 2% of their capacity per year. The battery may also be depleted by transmitter use since the total capacity of the battery when new is about 100,000 operating seconds. When the transmitter is activated more than a few times daily, battery life will be affected. When operated with the magnet/reed switch or N/C input, the transmitter a small current to monitor the loop and limits the life to 5 years. Battery status is transmitted with each activation. A low battery signal is indicated when the battery capacity has decreased by approximately 70% with 30% remaining.
Keep away from direct sunlight or heat exposure since high temperature decreases battery life. The transmitter may be attached using double sided adhesive tape silicone adhesive or any other convenient means. Mount the transmitter cover section to the mounting surface, which allows easy access for service.
The input circuit of the DW-101 A is a high impedance circuit and small amounts of leakage current across the input switches or contacts can cause improper operation. The input connections must be dry and any splices should be taped and sealed against moisture intrusion especially if the transmitter or sensors are located in an area where condensation can occur.
Input Circuits and Operation
An alarm circuit may be connected to the two terminals located at the end of the transmitter of the magnet/internal reed switch may be used. The input circuit and Magnet/internal reed switch may not be used together because the internal reed is connected to the terminal block. The reed is normally open when the magnet is removed.
If an alarm circuit is used the circuit may be either normally open (N/O) or normally closed (N/C). Set the RED jumper according to the table below.
The transmitter may be operated in the Non-Polled supervised mode or in momentary mode. In the supervised mode the transmitter sends an ALARM signal to the receiver when the alarm condition exists and a RESTORE signal to the receiver when the alarm condition ceases to exist. In the momentary mode the transmitter only sends an ALARM signal to the receiver when the BLACK jumper according to the table below.
RED JUMPER LINK: On=Input circuit normally closed changing to open circuit to transmit alarm. OR=Magnet/Reed switch operation. OFF=Input circuit normally open changing to closed circuit to transmit alarm.
BLACK JUMPER LINK: ON=When the input circuit returns to the non-alarm condition the RESTORE code is transmitted to the receiver, for use with non-polled supervision receivers and decoders. OFF=RESTORE code transmission is disabled.
SUGGESTION: When setting the jumpers to open remove the jumper and turn it aside and install on only one pin. The jumper will be there for later use.
For solid state switch inputs the terminal nearest to the battery is (-) or common. For voltage triggering the voltage must be 9v minimum. The presence of voltage on the input terminals is equivalent to an open circuit. Zero volts across the input terminals is equivalent to a normally closed circuit.
The reed switch is centered on the same side as the terminal block. When mounting align the magnet with the indicator on the side of the case. When not in use store the transmitter with the magnet on the opposite side of the reed or at the top to prevent discharge of the battery.