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.
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.
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.
!
Table of Contents
1
Description
2
Ordering Information
2
Electrical Specifications
3
Pin Assignments
3
Pin Descriptions
4
PCB Footprint
4
Board Layout Guidelines
5
Schematic Diagram
6
Usage Guidelines for Regulatory Compliance
6
Additional Testing Requirements
7
Module Modification
7
Information to the user
8
Brazil Anatel Labeling Requirements
8
Product Labeling
9
Antenna Selection
10
Interference Considerations
11
Helpful Application Notes From Linx
11
Power Supply Requirements
EVM-915-DTS RF
Data Guide
Description
The EVM-915-DTS features the DTS Series
transceiver module in a FCC modular approved
solution. It is designed to greatly simplify
implementation of the DTS Series module into a
working design without the complications of FCC
testing.
Figure 1: EVM-915-DTS Module
The module combines a state-of-the art low power wireless transceiver
with a powerful multipoint-to-multipoint protocol controller to form a
transparent wireless communication solution capable of replacing wires in
almost any RS-232/422/485 application. With a 115dB link budget and
very low power operation modes, the DTS Series is excellent for AMR,
RFID, home automation, and any other application requiring long range
(<1500 feet, 457m line of sight) and long battery life.
Features
•
U.S FCC and Brazil ANATEL
Certified
•
True UART to antenna solution
•
16-bit CRC error checking
•
100kbps max RF data rate
•
32 channels in DTS mode, 84 in
LP mode, North American version
•
19 unique channels in DTS mode,
52 unique channels in LP mode,
Brazilian version
Applications
•
Direct RS-232/422/485 Wire
replacement
•
Asset tracking
•
Automated meter reading
•
Includes PHY and MAC protocol
•
Low power Standby and Sleep
modes
•
CSMA medium access control
•
115dB link budget in DTS mode
•
4 modes allow user to optimize
power/range
•
5 volt tolerant I/O
•
868–870MHz European version
available
Warning:
This product incorporates numerous static-sensitive
components. Always wear an ESD wrist strap and observe proper ESD
handling procedures when working with this device. Failure to observe
this precaution may result in module damage or failure.
•
Industrial and/or home
automation
•
Wireless sensors
•
Remote data logging
–
1
–
Revised 3/18/2015
Ordering Information
Ordering Information
Product Part No.
EVM-915-DTS-FCS
Description
TRM-915-DTS Evaluation Module,
915MHz, Straight RP-SMA Connector,
FCC Approved
TRM-915-DTS Evaluation Module,
915MHz, Right Angle RP-SMA
Connector, FCC Approved
TRM-915-DTS Evaluation Module,
915MHz, Right Angle RP-SMA
Connector, Brazil Anatel Approved
TRM-915-DTS-BRZ Evaluation
Module, 915MHz, Straight RP-SMA
Connector, Brazil Anatel Approved
Radiotronix Part No.
Wi.232DTS-FCC-ST-R
Pin Assignments
1
2
3
4
5
6
7
8
9
10
11
24
23
22
21
20
19
18
17
16
15
14
13
EVM-915-DTS-FCR
Wi.232DTS-FCC-RA-R
EVM-915-DTS-BRZ
Wi.232DTSB-EVM-RA-R
EVM-915-DTS-BZS
Wi.232DTSB-EVM-ST-R
12
Figure 4: DTS Series EVM Module Pin Assignments (Top View)
Figure 2: Ordering Information
Electrical Specifications
Electrical Specifications
Parameter
Power Supply
Operating Voltage
Supply Current
Receive
Transmit, Po = 0dBm
Transmit, Po = 13dBm
Digital Interface
Output
Logic Low
Logic High
Input
Logic Low
Logic High
Environmental
Operating Temperature Range
Figure 3: Electrical Specifications
–40
85
°C
V
IL
V
IH
0
0.7*V
CC
0.3*V
CC
V
CC
VDC
VDC
V
OL
V
OH
0
2.5
0.4
V
CC
VDC
VDC
V
CC
I
CC
25
35
60
mA
mA
mA
4
12
VDC
Designation
Min.
Typ.
Max.
Units
Notes
Pin Descriptions
Pin Descriptions
Pin Number
1
2
Name
VCC
RXD
I/O
—
I
Description
Supply Voltage
UART Receive Data Input. This is the input
line for the configuration commands as well
as data to be sent over the air.
UART Transmit Data Output. This is the
output line for the configuration command
responses as well as the data received over
the air.
UART Clear To Send, active low. This line
indicates to the host microcontroller when
the module is ready to accept data. When
CTS is high, the module is busy. When CTS
is low, the module is ready for data.
Command Input. This line sets the serial
data as either command data to configure
the module or packet data to be sent over
the air. Pull low for command data; pull high
for packet data.
No Electrical Connection. Do not connect
any traces to these lines.
Ground
3
TXD
O
4
CTS
O
5
CMD
I
6, 7, 8, 9, 10,
15, 16, 17,
18, 19, 20,
21, 22
11, 12, 13,
14, 23, 24
NC
—
GND
—
Note:
Please see the TRM-915-DTS data guide for complete information
about the module, detailed specifications and configuration commands.
–
2
–
Figure 5: DTS Series EVM Module Pin Descriptions
–
3
–
PCB Footprint
1.50”
(38.10)
0.208”
(5.28)
1
24
Schematic Diagram
VCC
R1
1K
VCC
R2
1K
JP3
VCC
GND
1.38”
(35.05)
0.10”
(2.54)
1
2
3
4
Ø0.04” x 24
(1.02)
MOD1
GND
GND
GND
GND
VCC
15
16
17
18
19
GND
GND
GND
GND
VCC
0.7”
(1.78)
0.05”
(1.27)
1.40”
(35.56)
0.05”
(1.27)
GND
1
The module’s design makes integration straightforward; however, it
is still critical to exercise care in PCB layout. Failure to observe good
layout techniques can result in a significant degradation of the module’s
performance. Grounding, filtering, decoupling, routing and PCB stack-up
are all important considerations for any RF design. Some basic design
guidelines are provided here.
The module should, as much as reasonably possible, be isolated from
other components on your PCB, especially high-frequency circuitry such as
crystal oscillators, switching power supplies, and high-speed bus lines.
When possible, separate RF and digital circuits into different PCB regions.
Make sure internal wiring is routed away from the module and antenna and
is secured to prevent displacement.
Bypass caps should be low ESR ceramic types and located directly
adjacent to the pin they are serving.
In some instances, a designer may wish to encapsulate or “pot” the
product. Since such compounds can considerably impact RF performance
and the ability to rework or service the product, it is the responsibility of the
designer to evaluate and qualify the impact and suitability of such materials.
–
4
–
VIN
GND
GND
JP1
12
11
10
9
8
7
6
5
4
3
2
1
JP2
12
11
10
9
8
7
6
5
4
3
2
1
GND
2
Board Layout Guidelines
NC
Figure 6: DTS Series EVM Module PCB Footprint
GND
ANT
GND
RESET
C2D
NC
NC
CTS
TXD
RXD
CMD
NC
14
13
12
11
10
9
8
7
6
5
4
3
GND
GND
J1
CTS
TXD
RXD
CMD
GND
CMD
CTS
TXD
RXD
VIN
U1
1
IN
OUT
3
VCC
+
C1
C2
GND
GND
2
T
3.3V
GND
GND
GNDGND
Figure 7: DTS Series EVM Module Schematic
–
5
–
嵌入式系统
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