Crestron Electronics CWD7041 Two-Way RF Transceiver Module User Manual Manual CWD7041 Doc7263A

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Document ID	1486123
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Date Submitted	2011-06-20 00:00:00
Date Available	2011-06-20 00:00:00
Creation Date	2011-06-16 09:08:03
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Crestron CWD7041
Two-Way RF Transceiver Module
with Integral Antenna
Operations Guide
This document was prepared and written by the Technical Documentation department at:
Crestron Electronics, Inc.
15 Volvo Drive
Rockleigh, NJ 07647
1-888-CRESTRON
Regulatory Compliance
Federal Communications Commission (FCC) Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following conditions:
(1) This device may not cause harmful interference and (2) this device must accept any interference received,
including interference that may cause undesired operation.
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 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 if 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
Operation is subject of 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.
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 colocated or operating in conjunction with any other antenna or
transmitter.
All brand names, product names and trademarks are the property of their respective owners.
©2011 Crestron Electronics, Inc.
Crestron CWD7041
Two-Way RF Transceiver Module with Integral Antenna
Contents
Two-Way RF Transceiver Module with Integral Antenna: CWD7041 .........1
Functions and Features .............................................................................................................. 1
Specifications............................................................................................................................. 2
Physical Description .................................................................................................................. 2
Ports............................................................................................................................. 3
Power/I-O .................................................................................................................... 3
Labeling Requirements .............................................................................................................. 4
Documentation ........................................................................................................................... 4
Operations Guide - DOC. 7263A
Contents  i
Crestron CWD7041
Two-Way RF Transceiver Module with Integral Antenna
Two-Way RF Transceiver Module
with Integral Antenna: CWD7041
Functions and Features
The CWD7041 (hereafter referred to as “module”) 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 or over a cable run for further processing (depending on the application).
Functional Summary



Operations Guide - DOC. 7263A
2.4 GHz frequency band, IEEE 802.15.4 specification
Range from 3 feet to 50 ft.
Operates on one of sixteen available channels to establish optimal
signal quality
Two-Way RF Transceiver Module with Integral Antenna: CWD7041  1
Two-Way RF Transceiver Module with Integral Antenna
Crestron CWD7041
Specifications
The table below is a summary of specifications for the CWD7041.
Specifications of the CWD7041
SPECIFICATION
DETAILS
Power Requirements
0.22 Watts (3.3VDC @ 0.067A)
Operating Frequency
2400 MHz to 2483.5 MHz (802.15.4 compliant)
Operating Ranges*
Minimum Distance
3 ft
Maximum Distance Outdoors
(without repeater device)
550 ft
Available Channels
16 (numbered 11 through 26 per 802.15.4)
Serial Communication
SPI, 3.3V Nominal
Dimensions
Width:
1.25 in (3.18 cm)
Height: 1.57 in (4.00 cm)
Depth:
0.50 in (1.27 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.
Physical Description
The module, shown below, consists of various components attached to a printed circuit board. An
antenna is attached to the circuit board while a 25-pin header is for the application-specific installation.
Physical View of CWD7041
2  Two-Way RF Transceiver Module with Integral Antenna: CWD7041
Operations Guide - DOC. 7263A
Crestron CWD7041
Two-Way RF Transceiver Module with Integral Antenna
CWD7041 Detail View
1.57 in
(4.00 cm)
1.25 in
(3.18 cm)
Ports
The module contains a 25-pin header. Refer to the diagrams and descriptions that follow.
Power/I-O
The 25-pin header provides power to the module, serial communications between the module and
wired devices, as well as connections to the debug port. Refer to the following table for pin
assignments of the module interface connector.
Power/I-O Pinout Signals
Pin #
Signal
Pin #
Signal
Pin #
Signal
SPI MISO
10
RESET
18
PB6
PB4
11
PA6
19
PC2 / JTDO
SPI_MISO
12
+3.3V
20
PB7
PB3
13
PB1
21
PC3 / JTDI
SPI_CLK
14
GROUND
22
PC0 / JRST
PA7
15
PB2
23
PC4 / JTMS
PA4
16
PB5
24
PC1
PC7
17
JTCK
25
PB0
PA5/PTI_DATA
Operations Guide - DOC. 7263A
Two-Way RF Transceiver Module with Integral Antenna: CWD7041  3
Two-Way RF Transceiver Module with Integral Antenna
Crestron CWD7041
Labeling Requirements
If the FCC identification number is not visible when the module is installed inside another device, then
the outside of the device into which the module is installed must also display a label referring to the
enclosed module. This exterior label can use wording such as the following: “Contains Transmitter
Module FCC ID: EROCWD7041” or “Contains FCC ID: EROCWD7041.” Any similar wording that
expresses the same meaning may be used.
Documentation
The OEM integrator has to be aware not to provide information to the end user regarding how to install
or remove this RF module in the users manual of the end product.
The users 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.”
4  Two-Way RF Transceiver Module with Integral Antenna: CWD7041
Operations Guide - DOC. 7263A
Crestron CWD7041
Two-Way RF Transceiver Module with Integral Antenna
This page is intentionally left blank.
Operations Guide - DOC. 7263A
Two-Way RF Transceiver Module with Integral Antenna: CWD7041  5
Crestron Electronics, Inc.
15 Volvo Drive Rockleigh, NJ 07647
Tel: 888.CRESTRON
Fax: 201.767.7576
www.crestron.com
Operations Guide – DOC. 7263A
06.11
Specifications subject to
change without notice.

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