P/N 466-
5422 • REV A • 24APR2018
©
2018 United Technologies Corporation. All rights reserved
TX-E251 Long-Range Extended Battery Life DWS
PLEASE SEE REVERSE SIDE FOR IMPORTANT PRODUCT
WARNINGS AND DISCLAIMER INFORMATION.
Description
The TX-E251 Long-Range Extended Battery Life DWS is a sensor intended for
installation on doors, windows, and other objects that open and close. The
sensor transmits signals to the control panel when a magnet mounted near the
sensor is moved away from or closer to the sensor. The TX-E251 features a
high capacity CR2 lithium battery for extended battery life, and maximum
performance output power for long range applications. The sensor features two
separate zones: zone 1 can be used for either of the two reed switches, and
zone 2 can be used as an external contact option. The sensor is also equipped
with a cover tamper switch for additional security.
Figure 1: TX-E251
Reed Switch Enrolling
To enroll the TX-E251 into the panel for utilization of the
transmitter’s reed-
switches, follow these steps:
1)
Place the panel into program mode, then go to Learn Sensors menu.
Refer to your specific alarm panel manual for details on these
menus.
2)
Remove the battery pull tab to auto-enroll. Then select the
appropriate sensor group and number.
3)
If the panel does not respond upon removing the battery pull tab,
disengage the case cover from the back housing by sliding, then
remove and replace the battery until the panel responds.
External Contact Enrolling
To enroll the TX-
E251 into the panel for utilization of the transmitter’s external
contact, follow these steps:
1)
Remove the battery OR make sure the pull tab is still in place
between the positive battery terminal and the battery contact.
2)
Connect the external contact in the restored state (4.7K for normally
closed, or open circuit for normally open).
3)
Install the battery OR remove the pull tab, and install and lock the top
cover on to the sensor.
4)
Place the panel into program mode, then go to Learn Sensors menu.
Refer to your specific alarm panel manual for details on these
menus.
5)
To auto
–enroll the external contact into the panel, change the state
of the external contact to the faulted state (open circuit for normally
closed contact or 4.7K for a normally open contact).
6)
If the panel does not respond, then repeat steps 1 through 5.
External Contact Wiring
Use the following specifications for the external contact:
•
Maximum wire length: 26 ft. (8 m).
•
Wire: Stranded, 22-gauge (0.7112 mm).
•
Switches: Hermetically sealed external switches (sealed reed
switches) that supply a minimum 250 ms open or close on alarm.
Note:
Do not connect more than five external contacts to a door/window
sensor.
Caution
: You must install the provided EOL resistor at the external detection
device for proper supervision.
You can wire the sensor terminal blocks with leads from an external contact
(Figure 2). The door/window sensor provides alarm and tamper indication. Wire
the external contact with one end-of-line (EOL) resistor in series with the
external contact.
This gives the following readings for each configuration:
Normally closed:
•
Zero ohm/short = Tamper
•
4.7 Kohm = Normal
•
Open = Alarm
Normally open:
•
Zero ohm/short = Tamper
•
4.7 Kohm = Alarm
•
Open = Normal
Figure 2: External Contact Wiring
Mounting
Included with this device is double sided tape for the transmitter and magnet,
as well as screws if a more secure method of mounting is preferred. Choose a
suitable location for the sensor by following the procedure in the section
“Testing the Sensor” ensuring desired signal strength is achieved. Note that it is
recommended the transmitter be installed on the stationary or non-moving part
of the installation (frame) and the magnet installed on the moving object (door).
Where possible, install sensors within 100 ft. (30 m) of the panel. While a
transmitter may have an open-air range of 500 ft. (150 m) or more, the
environment at the installation site may have a significant effect on operational
range. Changing a sensor location may improve wireless communication.
For reliable bonding with the provided double sided tape, ensure the surface is
clean and dry. Apply the tape to the backside of the sensor, and then to the
