STEP 3: Attach wires from the sensor switch to the transmitter screw terminals. Wire normally closed switches in series, and normally open switches in parallel (see Figures 5 & 6).
NOTE: A maximum of wire run of 50 feet with a total of four switches may be used with one transmitter.
Figure 5.
Normally
Open
Switch
Wiring
Figure 6.
Normally
Closed
Switch
Wiring
STEP 4: Slide the transmitter onto the back cover until locked into place to complete installation (see Figure 7).
CHECKOUT AND TEST
After installation, the transmitter and receiver should be checked out as a system.
Figure 7.
Typical
Installation
(Door and
Window)
operating properly, and that the transmitter’s digital code is correctly matched to the code set in the receiver.
CAUSES FOR NON-OPERATION
If the transmitter fails to activate the receiver, first check the coding switches to see that the switch keys in the transmitter and the receiver are correctly matched. Next, check the battery and replace it if it’s weak.
If the code is set correctly, the battery is good, and the LED lights but the receiver dosen’t activate, check for hidden metal obstacles or large metal appliances between the transmitter and receiver that may be blocking the radio signal.
CAUTION: The manufacturer strongly recommends that you test security equipment frequently. From the time of installation, it is absolutely necessary to test the system at least once a week. Although the
LINEAR LIMITED WARRANTY
This Linear product is warranted against defects in material and workmanship for twelve (12) months. The Warranty Expiration Date is labeled on the product. This warranty extends only to wholesale customers who buy direct from Linear or through Linear’s normal distribution channels. Linear does not warrant this product to consumers. Consumers should inquire from their selling dealer as to the nature of the dealer’s warranty, if any. There are no obligations or liabilities on the part of Linear corporation for consequential damages arising out of or in connection with use or performance of this product or other indirect damages with respect to loss of property, revenue, or profit, or cost of removal, installation, or reinstallation. All implied warranties, including implied warranties for merchantability and implied warranties for fitness, are valid only until Warranty Expiration Date as labeled on the product. This Linear Corporation Warranty is in lieu of all other warranties express or implied.
For warranty service on Linear equipment return product, at sender’s expense to:
U.S.A. | Canada |
Linear Corporation | Linear Canada Inc. |
2350 Camino Vida Roble, Suite A | 673 Consortium Court |
Carlsbad, CA 92009 | London, Ontario, Canada N6E 2S8 |
Attn: Repairs Department | Attn: Repairs Department |
IMPORTANT !!!
Linear radio controls provide a reliable communications link and fill an important need in portable wireless signalling. However, there are some limitations which must be observed.
For U.S. installations only: The radios are required to comply with FCC Rules and Regulations as Part 15 devices. As such, they have limited transmitter power and therefore limited range.
Receivers may be blocked by radio signals that occur on or near their operating frequencies, regardless of code settings.
A receiver cannot respond to more than one transmitted signal at a time.
Infrequently used radio links should be tested regularly to protect against undetected interference or fault.
A general knowledge of radio and its vagaries should be gained prior to acting as a wholesale distributor or dealer, and these facts should be communicated to the ultimate users.
D-21A, D-21A/K,
D-24A, D-24A/K,
D-26A, D-26A/K
Digital Security
Transmitters
Code Setting and Installation Instructions
A NORTEK COMPANY
Activate the transmitter by triggering the sensor. Verify that the LED lights when the sensor is triggered (except for
should last about a year, it is good practice to change the battery every six months.
Copyright © 1992 Linear Corporation | 200105 C |