OEM Long-Range
Handheld Transmitter
Data Guide
Warning:
Linx radio frequency ("RF") products may be
used to control machinery or devices remotely, including machinery
or devices that can cause death, bodily injuries, and/or property
damage if improperly or inadvertently triggered, particularly in industrial
settings or other applications implicating life-safety concerns. No Linx
Technologies product is intended for use in any application without
redundancies where the safety of life or property is at risk.
!
Table of Contents
1
Description
1
Features
1
Applications
2
Ordering Information
2
Electrical Specifications
3
Theory of Operation
4
Protocols
5
Setting the Transmitter Address
5
CMD-HHLR Button Assignments
6
Connection Considerations
6
Battery Replacement
6
Assembly Diagram
7
Labeling / Instruction Requirements
8
Receivers
9
Typical Applications
11
Resources
The customers and users of devices and machinery controlled with
RF products must understand and must use all appropriate safety
procedures in connection with the devices, including without limitation,
using appropriate safety procedures to prevent inadvertent triggering by
the user of the device and using appropriate security codes to prevent
triggering of the remote controlled machine or device by users of other
remote controllers.
Do not use this or any Linx product to trigger an action directly
from the data line or RSSI lines without a protocol or encoder/
decoder to validate the data.
Without validation, any signal from
another unrelated transmitter in the environment received by the
module could inadvertently trigger the action. This module does not
have data validation built in.
All RF products are susceptible to RF interference that can prevent
communication.
RF products without frequency agility or hopping
implemented are more subject to interference. This module does not
have frequency agility built in.
Do not use any Linx product over the limits in this data guide.
Excessive voltage or extended operation at the maximum voltage could
cause product failure. Exceeding the reflow temperature profile could
cause product failure which is not immediately evident.
Do not make any physical or electrical modifications to any Linx
product.
This will void the warranty and regulatory and UL certifications
and may cause product failure which is not immediately evident.
OEM Long-Range
Handheld Transmitter
Data Guide
Description
The Linx CMD-HHLR-***-xxx-MD Long-Range
1.375"
Handheld transmitter is ideal for general-
purpose remote control and command
applications that require longer transmission
R 0.2"
distances. As a part of our DS Series
encoder-based OEM family, it has been
2.00"
2.81"
pre-certified for FCC Part 15, Industry Canada
1.35"
and European CE (433MHz only) compliance,
reducing costs and time to market. Available
in 315, 418 (standard) or 433.92MHz, this
small remote has a range of up to 1,000 feet
1.62"
0.20"
0.60"
(300m) line of sight. It can be configured with
1 to 8 buttons and the keypad and labeling
Figure 1: Package Dimensions
can be customized. Selectable addressing
O
ON
Ligh
2
ts
O
1
allows the creation of up to 1,022 distinct
ON
O
3
Poo
l
O
transmitter-receiver relationships. The
D
ON
O
4
Spa
address can be easily changed via an
O
ON
C
A
externally accessible DIP switch. The
B
FASCO
transmission can be decoded using a
matching Linx Function Module, KH2 or
Figure 2: With a one-time NRE and minimum
KH3 Series receiver / decoder, or a Linx LR
order, Linx can configure the keypad and label
or LT Series receiver paired with a decoder
areas to meet your specific requirements.
IC or microcontroller. The unit uses a single 3V CR2032 lithium button cell.
FF
N
FF
N
FF
N
Features
•
FCC, Canada and CE
pre-certified
•
1 to 8 buttons
•
Customizable keypad
•
Two protocols for performance
(serial) and compatibility (Holtek)
Applications
•
General remote control
•
Keyless entry
•
Garage / gate openers
•
Lighting control
•
Call systems
•
Home / industrial automation
–
1
–
Revised 7/3/13
Ordering Information
Ordering Information
Part Number
CMD-HHLR-***-xxx-MD
EVAL-***-HHLR
Description
Long-Range Handheld Transmitter
HHLR Basic Evaluation Kit
Theory of Operation
The CMD-HHLR-***-MD Long-Range Handheld transmitter combines
the LR Series transmitter and LP Series antenna with an on-board DS
Series encoder IC to form a simple, yet highly reliable, RF remote-control
transmitter. The LR Series transmitter is a low-cost, high-performance
synthesized ASK / OOK transmitter. The transmitter’s synthesized
architecture delivers outstanding stability and frequency accuracy, while
minimizing the effects of antenna port loading and mismatching. This
reduces or eliminates frequency pulling, bit contraction, and other negative
effects that are common to SAW-based transmitter architectures, providing
a significantly higher level of performance and reliability.
When a button is pressed on the transmitter, power is applied to the
internal circuitry and the encoder IC is enabled. The encoder detects the
logic states of the address lines and button data lines. These states are
formatted into a three-word transmission cycle that continues until the
button is released. The encoder data is used to modulate the transmitter,
which, through the antenna, conveys the data into free space. On the
receiver side, a decoder IC or custom microcontroller is used to check
the transmitter’s address bits against the address settings of the receiving
device. If a match is confirmed, the decoder’s outputs are set to replicate
the transmitter’s button states. These outputs can then be used to activate
external circuitry required by the application.
The transmitter is compatible with several Linx receiver products, including
the LR, KH2, KH3, LT and OEM product families. For applications where
range is critical, the LR Series receiver is the best choice due to its
outstanding sensitivity. When the transmitter is combined with an LR Series
receiver and the DS Series decoder, ranges of up to 1,000 feet (300m) are
possible. Applications operating over shorter distances will also benefit
from the increased link reliability and superior noise immunity provided by
the LR Series receiver.
*** = 315, 418 (Standard) or 433.92MHz
xxx = Custom color, leave blank for black
Figure 3: Ordering Information
Electrical Specifications
Electrical Specifications
Parameter
Power Supply
Operating Voltage
Supply Current
Power-Down Current
Transmitter Section
Transmit Frequency Range
CMD-HHLR-315-MD
CMD-HHLR-418-MD
CMD-HHLR-433-MD
Center Frequency Accuracy
Environmental
Operating Temperature Range
1. Characterized, but not tested
Figure 4: Electrical Specifications
–40
+85
°C
1
–50
F
C
315
418
433.92
+50
MHz
MHz
MHz
kHz
V
CC
l
CC
l
PDN
2.1
3.0
3.4
5.0
3.6
VDC
mA
nA
1
Designation
Min.
Typ.
Max.
Units
Notes
–
2
–
–
3
–
Protocols
The DS Series encoder inside the Long-Range Handheld transmitter
supports two protocols. The first protocol is based on the Holtek HT640
encoder and is completely backwards compatible with older generation
transmitters and systems based on the HT658 decoder. The second is a
serial protocol that offers more noise immunity and faster response time
while keeping the simple addressing.
The transmitter can use only one protocol at a time. The protocols do not
work together.
The protocol is selected with a switch next to the battery. Figure 5 shows
this switch.
Setting the Transmitter Address
The Long-Range Handheld transmitter
allows the selection of one of 1,022
unique addresses. All transmitters are
supplied set to the same address. To
avoid contention with other units or to
create unique relationships, the address
can be changed. This is accomplished
using internal DIP switches as shown. The
switches are accessed by removing the
DIP switch access cover on the back of
the transmitter.
OFF ON
If the switch is on, the address line is
connected to ground, otherwise it is pulled
to supply. The receiver’s address must
match exactly in order for the units to
communicate. Application Note AN-00300
describes in detail how to set the address
Figure 6: DIP Switch Assignments
to match any of the receivers offered by Linx. This note can be found in the
Support section of the Linx website, www.linxtechnologies.com.
Note:
Setting all of the DIP switches on or all of them off are not valid
addresses. At least one switch must be different from the rest.
Figure 5: Protocol Selection Switch
A0 = 1
A1 = 2
A2 = 3
A3 = 4
A4 = 5
A5 = 6
A6 = 7
A7 = 8
A8 = 9
A9 = 10
If the switch is toward the top then the Holtek protocol is selected. If the
switch is toward the bottom then the serial protocol is selected.
CMD-HHLR Button Assignments
Figure 7 illustrates the relationship between the button locations and
encoder data lines.
D7
D5
D3
D1
D6
D4
D2
D0
Figure 7: Button Assignments
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4
–
–
5
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