Crestron CWD7191
Two-Way RF Transceiver Module
Operations Guide
Regulatory Compliance
Federal Communications Commission (FCC) Compliance Statement
CAUTION: Changes or modifications not expressly approved by the manufacturer responsible for compliance could
void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment and receiver
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
Consult the dealer or an experienced radio/TV technician for help
Industry Canada (IC) Compliance Statement
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause interference and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or
lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than
that necessary for successful communication.
This radio transmitter, IC: 5683C-CWD7191, has been approved by Industry Canada to operate with the antenna types
listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly
prohibited for use with this device.
Antenna Type: Dipole, Maximum permissible antenna gain: 2.5 dBi, Impedance: 50 Ohms
Industrie Canada (IC) Déclaration de conformité
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2)
l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un
type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques
de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que
la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une
communication satisfaisante.
Le présent émetteur radio , IC: 5683C-CWD7191, a été approuvé par Industrie Canada pour fonctionner avec les types
d'antenne énumérés ci-dessous et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne.
Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement
interdits pour l'exploitation de l'émetteur.
Type d'antenne: Dipole, Gain admissible maximal: 2.5 dBi, Impédance: 50 Ohms
To satisfy RF exposure requirements, this device and its antenna must operate with a separation distance of at least 20
centimeters from all persons and must not be collocated or operating in conjunction with any other antenna or
transmitter.
This document was written by the Technical Publications department at Crestron.
©2013 Crestron Electronics, Inc.
Crestron CWD7191 Two-Way RF Transceiver Module
Contents
Two-Way RF Transceiver Module: CWD7191 .............................................. 1
Functions and Features .............................................................................................................. 1
Specifications ............................................................................................................................. 2
Physical Description – CWD7191 with a SMD Antenna .......................................................... 3
Physical Description – CWD7191 with a Dipole Antenna ........................................................ 4
Connectors ................................................................................................................................. 5
Ports ............................................................................................................................. 5
Power/I-O .................................................................................................................... 5
Setup .......................................................................................................................................... 7
Labeling ..................................................................................................................................... 7
Documentation ........................................................................................................................... 7
Operations Guide - DOC. 7439C Contents i
Crestron CWD7191 Two-Way RF Transceiver Module
Two-Way RF Transceiver Module:
CWD7191
Functions and Features
The CWD7191 (hereafter referred to as “module”), with a dipole antenna or an integrated SMD
antenna, is a two-way radio frequency (RF) module that utilizes the 2.4 GHz frequency band to
communicate with other devices.
The module operates according to the IEEE 802.15.4 specification and can be configured to minimize
the possibility of interference with other devices.
The module receives RF signals from one or more Crestron devices and can transmit these signals over
the air for further processing (depending on the application).
Functional Summary
2.4 GHz frequency band, IEEE 802.15.4 specification
Range from 3 feet to 550 ft.
Operates on one of sixteen available channels to establish optimal signal
quality
Operations Guide - DOC. 7439C Two-Way RF Transceiver Module: CWD7191 1
Two-Way RF Transceiver Module Crestron CWD7191
Specifications
The table below is a summary of specifications for the CWD7191.
Specifications of the CWD7191
SPECIFICATION DETAILS
Power Requirements 1.3 W (5 Vdc @ 0.26 A)
Operating Frequency 2400 MHz to 2483.5 MHz (802.15.4 compliant)
Operating Ranges*
Minimum Distance
Maximum Distance Indoors
(without repeater device)
Available Channels 16 (numbered 11 through 26 per 802.15.4)
Antenna (External) Gain: 2.0±0.5 dBi max.
Antenna (Internal) Max. Gain: 1.8 dBi
Dimensions Width: 1.80 in (4.57 cm)
* The location and orientation of the module are important factors in the RF performance. With the unit located outside of
any metal enclosures, the antenna is adjusted to achieve the best range. The range is dependent on its placement and the
building in which it is used. The construction of the building, obstructions, and RF interference from other devices are
factors determining the effective range of the unit. To prevent unit-to-unit RF interference, multiple modules operating at
the same frequencies should not be installed within 3 – 5 feet of each other.
3 ft
550 ft
Type: Sleeve Dipole Antenna
Frequency: 2.4 GHz to 2.5 GHz
Connector Type: SMA Plug Reverse
Polarity Connector with ¼-36 UNS2B Screw
Average Gain: -1.9 dBi
Type: SMD
Frequency: 2.4 GHz to 2.5 GHz
Height: 2.00 in (5.08 cm)
Depth: 0.45 in (1.14 cm)
2 Two-Way RF Transceiver Module: CWD7191 Operations Guide - DOC. 7439C
Crestron CWD7191 Two-Way RF Transceiver Module
Physical Description – CWD7191 with a SMD Antenna
The module, shown below, consists of various components attached to a printed circuit board. The
circuit board attaches an intended SMD mounting antenna while a 25-pin D-SUB male connector is for
the application-specific installation.
Physical View of CWD7191 (SMD Antenna)
CWD7191 Detail Views
SIDE BACK
SMD ANTENNA
P
C
B
RF SHIELD
0.45 inch
1.14 cm
PCB WITH RADIO
D-SUB 25 PIN
MALE CONNECTOR
PIN 1
PIN 2
1.80 inch
4.57 cm
P1
PIN 25
PIN 24
2.00 inch
5.08 cm
Operations Guide - DOC. 7439C Two-Way RF Transceiver Module: CWD7191 3
Two-Way RF Transceiver Module Crestron CWD7191
Physical Description – CWD7191 with a Dipole Antenna
The module, shown below, consists of various components attached to a printed circuit board. A SMA
reverse polarity female antenna port is located at the edge of the circuit board for the attaching of a
dipole antenna while a 5-pin double row male connector is for the application-specific installation.
Physical View of CWD7191 (Dipole Antenna)
CWD7191 Detail Views
SIDE BACK
SMA PLUG REVERSE
POLARITY CONNECTOR
RF SHIELD
RF SHIELD
P
C
B
0.40 inch
1.02 cm
0.050" X 0.05"LS, RT ANGLE, SM
RF SHIELD
1.5" X 1.0" X 0.24"
HEADER, 5PIN, DBL ROW
PIN 2
PIN 1
2.50 inch
6.35 cm
PIN 10
PIN 9
P2
2.00
5.08 cm
inch
4 Two-Way RF Transceiver Module: CWD7191 Operations Guide - DOC. 7439C
Crestron CWD7191 Two-Way RF Transceiver Module
Connectors
Ports
For the CWD7191 with a SMD antenna, the module contains a 25-pin D-SUB male connector and a
10-pin debug header.
For the CWD7191 with a dipole antenna, the module contains a 5-pin double row male connector, a
10-pin debug header, and one antenna port.
The diagrams and descriptions of the 25-pin D-SUB male connector and the 5-pin double row male
connector are shown in the “Power/I-O” section.
Power/I-O
The 25-pin D-SUB male connector provides power to the module as well as the communication
between the module and wired devices. Refer to the following table for pin assignments of the module
interface connector.
1
1089765432
17151311
18
161412
232119
25
242220
NOTE: Pins 8, 10 and 12 provide power to the circuit card.
Power/I-O Pinout Signals
Pin # Signal Pin # Signal
1
3
5
7
9
11
13
15
17
19
21
23
25
PA7 2 PC7
PB3 4 PC6
PB4 6 RESET
SPI MOSI 8 5V
SPI MISO 10 5V
SPI CLK 12 5V
PA4 14 GND
PA5 16 GND
PA6 18 GND
PB1/TXD 20 PB5
PB2/RXD 22 PB6
PB0 24 PB7
PC1
Operations Guide - DOC. 7439C Two-Way RF Transceiver Module: CWD7191 5
Two-Way RF Transceiver Module Crestron CWD7191
The 5-pin double row male connector provides power to the module as well as the communication
between the module and wired devices. Refer to the following table for pin assignments of the module
interface connector.
246810
P2
13579
(Top View)
NOTE: Pin 3 provides power to the circuit card.
Power/I-O Pinout Signals
Pin # Signal Pin # Signal
1
3
5
7
9
PB2/RXD 2 PB1/TXD
5V 4 GND
SPI MISO 6 GND
SPI MOSI 8 GND
RESET 10 SPI CLK
6 Two-Way RF Transceiver Module: CWD7191 Operations Guide - DOC. 7439C
Crestron CWD7191 Two-Way RF Transceiver Module
Setup
Refer to the hookup diagram below, which shows the connections made to the module. Complete the
connections in any order.
NOTE: To prevent unit-to-unit RF interference, multiple modules operating at the same frequencies
should not be installed within three to five feet of each other.
Hardware Hookup
CWD7191
RADIOMODULE
PIN 25
PIN 1
P1
PIN 24
PIN 2
CONTROL
+5V
PIN 24
PIN 25
J5
HOST PCB
PIN 1
PIN 2
PIN 9
PIN 10
PIN 9
P2
PIN 1
RF SHIELD
PIN 2
CABLE ASSY,
2.5 INCH
5 PIN DBL ROW
FEMALE, CONNC.
PIN 10
J3
HOST PCB
PIN 1
PIN 2
Labeling Requirements for the Host Device
The host device shall be properly labeled to identify the modules within the host device.
The FCC and Industry Canada certification label of a module shall be clearly visible at all times when
installed in the host device, otherwise the host device must be labeled to display the FCC and Industry
Canada certification numbers of the module, proceeded by the words “Contains Transmitter Module”,
or the word “Contains”, or similar wording expressing the same meaning as follows:
Contains FCC ID: EROCWD7191
Contains IC: 5683C-CWD7191
Operations Guide - DOC. 7439C Two-Way RF Transceiver Module: CWD7191 7
Two-Way RF Transceiver Module Crestron CWD7191
Documentation
The OEM integrator has to be aware not to provide information to the end us er regarding how to install
or remove this RF module in the user manual of the end product.
The user manual for OEM integrators must include the following information in a prominent location.
“IMPORTANT NOTE: To comply with FCC RF exposure compliance
requirements, the antenna used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all persons and must not be co-located
or operating in conjunction with any other antenna or transmitter.”
8 Two-Way RF Transceiver Module: CWD7191 Operations Guide - DOC. 7439C
Crestron CWD7191 Two-Way RF Transceiver Module
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Operations Guide - DOC. 7439C Two-Way RF Transceiver Module: CWD7191 9
Crestron Electronics, Inc. Operations Guide – DOC. 7439C
15 Volvo Drive Rockleigh, NJ 07647
Tel: 888.CRESTRON 03.13
Fax: 201.767.7576 Specifications subject to
www.crestron.com change without notice.
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