RFSOLUTIONS DS-ZULUM Radio modem module Datasheet

ZULU M
Radio MODEM Module
Features
• Intelligent RF Modem Module
•
Serial Data Interface with Handshake
•
Host Data Rates up to 38,400 Baud
•
RF Data Rates to 56Kbps
•
Range up to 2Km
•
Minimal external components
•
Direct Led Drive Shows Data Flow
•
8 User Selectable Channels
•
Secure Data Protocol
•
Ultra Low Power 1.8 - 3.6V Operation
•
CE Compliant for Licence Free Use
•
868MHz or 915MHz Versions
•
100mW Transmit Power (+20dBm)
Applications
•
Remote Networking
•
Receiver Sensitivity –121dBm
•
USB/RS232 Cable Replacement
•
Remote Data Log
•
Meter Reading
The ZULU Modem module is a highly integrated RF Modem and intelligent controller
with simple interface to achieve a wireless serial data link for data (upto 38K4bps) over
2KM range. Range may be further extended with suitable antenna.
The user interface is standard RS232 style control operating at low voltage. All RF operation is automatically controlled (with error checking etc) so the Zulu can be treated
as a simple Communications device. Possible applications include one-to-one and multinode wireless links in applications including car and building security, EPOS, inventory
tracking, remote industrial process monitoring and computer networking. Because of
their small size and low power requirements this module is ideal for use in portable,
battery-powered applications such as hand-held terminals.
Part No
Description
ZULU-M868
Radio Modem Module DIP Package
ZULU-M868-SO
Radio Modem Module SMT Package
DS-ZULUM-2
ZULU Modem
Pinout
Pin Description
Pin No
Name
Direction
Description
1
ANT
In
2, 15
GND
In
Connect to Ground
3-5,
11,
13-14,
20-24
N/C
N/A
Unused Leave Disconnected.
6
RX
In
(Low Level RS232) Data in
7
TX
Out
Low Level RS232 Data Out
8
LINK
In
Connect to LINK on Pin 28
Antenna Input / Output 50ohm Impedance
9
CTS
Out
Low Level RS232 CTS
10
RTS
In
Low Level RS232 RTS
12
RESET
In
Device Reset Input (Tie High via 10K Resistor)
16
Vcc
In
+2.2-3.6v
17-18
DR1-DR2
In
Host Data Rate selection.
19
WRE
In
When High configuration data is held in EEPROM.
When Low configuration data is held in volatile memory
and lost on power cycle.
25
PD
In
Power down mode. Take low to enter Sleep mode
26
TX LED
Out
RF TX LED indicator
27
RX LED
Out
RF RX LED indicator
28
LINK
Out
Connect to LINK on Pin 8
29-30
XTAL1-2
In
Connect 30MHz XTAL here to drive RF Circuit
DS-ZULUM-2
ZULU Modem
Pin Descriptions:
RX, TX
This is the Data Input / Output. Data is transmitted and received at the low voltage level
(dependant on Vcc being used). Compatible with LCTTL / LVCMOS
Serial Data Format
Baud Rate:
Defined by DR1 and DR2 Pins
Data Bits:
8
Parity:
None
Stop Bits:
1
Flow Control:
Hardware CTS / RTS
CTS, RTS
Clear to Send and Request to Send are standard data flow control used in RS232 systems,
these are standard but operate at the Zulu Vcc low level voltage.
If no handshaking required RTS may be pulled low, however beware of data overrun errors of
transmitting streams of data longer than the data buffer!
RESET
Connection to GND Resets the Zulu Module. Zulu Modem starts up when this input is taken
from GND to Vcc. Normal operation: connect to Vcc through a 10Kohm Resistor
DR1
DR2
Host Baud Rate
Vcc / Unconnected
Vcc / Unconnected
GND
GND
Vcc / Unconnected
GND
Vcc / Unconnected
GND
4,800
9,600
19,200
38,400
Vcc:
Supply Voltage (2.2—3.6V)
DR1 - DR2
These inputs define the host interface Baud Rate. They are read when RESET pin goes high.
Tip: It is good practice to operate the host interface at half the speed of the RF data rate (set
by Register R5
PD
This input enables ‘Sleep’ Mode. For normal operation connect to Vcc. No RF packets will be
received by the module when it is in sleep mode.
WRE
Controls where the User configuration parameters are saved in internal EEPROM (NonVolatile) or RAM (Volatile) Un-used. Thiis may be ignored unless the application requires specific address timimng on powerup.
Tx / Rx LED
Direct LED Drive which operates whenever there is RF activity.
XTAL1, XTAL2
The Zulu module requires a 30MHz drive Crystal to be connected between XTAL1-2
Any standard crystal +/-10ppm ~20pF such as FEC 184-2247.
DS-ZULUM-2
ZULU Modem
Operation Overview
The ZULU MODEM Module provides a simple Modem interface to the host controller. It handles all RF data communications automatically and without any requirement from the user (RF
packetising , Preamble, Encoding, CRC Check etc).
With this powerful high-speed Radio link. The following networks can be realised;
OneOne-toto-One operation; for point to point data communication
OneOne-toto-Many;
Many A network consisting a master and many slaves (the receivers all have the same
address)
ManyMany-toto-One; where the transmitters all send to a single receiver address.
Because each ZULU MODEM can contain a unique address, multiple ZULU networks can coexist in the same area.
Broadcast operation; where a single master Zulu MODEM addresses many ZULU MODEMS
concurrently. (using many ZULU MODEM modules set to the same address),
Operating Modes
Configuration Mode: In Configuration mode the Zulu MODEM can receive a number of commands and the internal registers can be preset to control its operation. In this mode the Zulu
MODEM is ‘Offline’ and cannot send or receive RF data.
Normal Operation : ZULU MODEM is ’Online’ automatically transmitting and receiving data
from its host and across the RF network.
Each ZULU MODEM has its own preset address. This is user set during configuration. Any data received is examined and the address header embedded within the data packet is compared
with its address. Only data received with matching address will be processed and output to
the host, all other data will be discarded.
All ZULU MODEM modules are shipped with a default address of 7E7E7E.
The ZULU MODEM contains an on-board data buffer equal to two data packets. Therefore if
RTS is asserted (then the host is unable to receive data) the module will store a max of two
data packets, all further data packets received will be discarded.
Application Circuit
Connection of the ZULU Modem to an RS232 or USB host terminal device such as a PC serial
port may easily be achieved.
An Evaluation board is available which provides this capability a schematic is printed in this
datasheet.
DS-ZULUM-2
ZULU Modem
Configuration Mode (offline)
Commands can be set using a standard Terminal program or by sending the relevant ASCII
characters.
Each Command must be followed by the Carriage Return <CR> or ‘Enter’
Note All commands are entered in upper case
Command
Description
Response from Zulu
Enter Configuration Mode
+++
?
F
H
Note: these must be sent as a string
with no char in front or behind this is to
ensure that the +++ is not mistakenly
received in mid data.
retrieve the current register values
set factory defaults;
R1=7F7F7F
R2=7F7F7F
R3 = Ch2 (869.450MHz)
R4 = 7
(+20dBm)
R5 = 1
(19K2)
Help
Ping Mode
This sends a ping request .
P
On receiving, the recipient Zulu Modem
will respond with its address and the level
of RSSI (Received Signal Strength)
The Ping command is continuously repeated every 1 second until any command or
character is entered.
Zulu responds with Status info
Zulu responds with all Register Values
‘OK’
Brief description of commands available
The originating Zulu Modem will respond
with the Recipient Zulu Modems’ response,
eg.
Received from 7F7F7F (D5)
Where
7F7F7F = the recipient Address
D5= RSSI
RSSI
Is a Hex value corresponding to the received signal strength
Min = 20hex
Max =E0hex
S
S
Save Configuration
‘SAVED’
Q
exit configuration mode and return to
online mode
No response
DS-ZULUM-2
ZULU Modem
Register Setting (Configuration Mode)
The internal registers enable various parameters to be controlled.
To set a register type ‘R#=x’ where # is the register number (1-6) and x is the value to set
For example, to set the channel to channel 3 type the following.
R3=3<CR>
(Where <CR> is carriage return or enter on the keyboard) The modem will then return ‘OK’ or
‘Error’ if an incorrect command is entered. Save the changes by typing
S<CR>
The modem will return with ‘SAVED’
Register
Value Range
R1
0000 - FFFFFF
(24 bit address)
R2
0000 - FFFFFF
(24 bit address)
R3
CH0
CH1
CH2
CH3
CH4
= 868.400 MHz
= 868.900 MHz
= 869.450 MHz
= 869.600 MHz
= 869.800 MHz
R4
0
1
2
3
4
5
6
7
= +1dBm
= +2dBm
= +5dBm
= +8dBm
= +11dBm
= +14dBm
= +17dBm
= +20dBm
R5
0
1
2
3
= 9,600
= 19,200
= 28,800
= 56,000
Description
Example
Sets the recipient Zulu MODEM Address
R1=0001
(Data sent is addressed to Zulu
MODEM with address 0001)
Set own Zulu Modem
address
R2=F001
(Data sent is from Zulu MODEM
with address F001)
Set RF channel
R3=2
(Transmit on Channel 2)
Set the RF Transmit Power
output*
R4=7
(sets Transmit Power to max)*
Set the RF baud rate*
R5=3
(sets the RF data rate to
56Kbps)
Channel Number
Frequency
Centre (MHz)
EU Power Allowance
mW / dBm
0
1
2
3
4
868.400
868.900
869.450
869.600
869.800
25 / 14
25 / 14
100 / 20
100 / 20
25 / 14
Notes
Applicable standard - EN300-220
Notes on power and frequency
The EU standard sets maximum power transmission limits dependent on the frequency, the
bandwidth and the application. Please check the relevant standards are being met when implementing your RF Application. A rough guidance applicable to the ZULU channel numbers is given below
*Note :
DS-ZULUM-2
Reducing Tx power reduces battery consumption!
Reducing the baud rate will increase the range!
ZULU Modem
Mechanical Dimensions
Range
The antenna choice and position affects controls the system range. Keep it clear of any large
metal components in the system. The best position by far, is protruding vertically from the top
of the product. This is often not desirable for practical reasons and thus a compromise may be
needed. Note that the space around the antenna is as important as the antenna itself. All radio systems are dependant on a radio signal being received through airspace.
The range quoted is the optimal in direct line of sight without obstacles and in good atmospheric conditions.
Range is affected by many things, for example local environmental conditions, atmospheric
conditions, interference from other radio transmitters. For evaluating the local environment
please see our RF Meter (DS006)
In the worst case, range quoted may be drastically reduced.
Recommended Antenna
The BEAD Antenna provides a Miniature PCB mounting solution
where performance is required from a small space .
Available as straight or 90 degree mount this antenna is a general purpose omni-directional. It measures 8.5mm long, Dia
7mm.
Please see Datasheet ANT-BEAD-868
DS-ZULUM-2
ZULU Modem
Technical Specifications
Absolute Maximums:
Temperature Range:
Range Storage –50 to +125oC.
Weight: SMT version 7grams, DIP Part 13grams
Parameter
Min
Supply Voltage
Voltage on any Input
Vcc > 2.2
Vcc < 2.2
Max Input power (thro Antenna)
Parameter
Min
Supply Voltage
Operating Temperature
Typical
Max
Units
4.0
V
5.8
V
Vcc +
V
+5
dBm
Max
Units
1.8
3.6
V
-40
+85
o
C
Zulu Tx Supply Current:
When Transmitting (At Max Power)
85
mA
1
uA
When Receiving
18.5
mA
When sleeping
1
uA
When sleeping
Zulu Rx Supply Current:
AC Characteristics
Parameter
Min
Operating Frequency—see freq channel setting
Operating Temperature
Max
Units
868
870
MHz
-40
+85
Band width per channel
Deviation
Typical
Zulu Rx Sensitivity
DS-ZULUM-2
C
100
KHz
45
KHz
Zulu Tx MAX Output Power
Zulu Tx—Rx FSK Raw RF Data Rate
o
9.6
-121
+20
dBm
56
Kbps
dBm
ZULU Modem
Zulu Modem Evaluation Board
The ZULU EVAL Board provides a ready made platform which can be used to
demonstrate the capabilities of ZULU Modem Modules providing ready made
RS232 and USB Modem Solutions.
Features
•
Direct Connection to RS232 / USB
•
9-12Vdc Power in Screw Terminal
•
LED Indication Transmit / Receiver
•
User Config Jumper Links
DS-ZULUM-2
Part No
Description
ZULUEVAL-M
Zulu Modem Eval Board
PSU-12V100MAUK
Plugtop Power Supply 12V 100mA
ZULU Modem
EVAL Board Configuration
Power Requirements: 99-15Vdc
Weight: 27grams, Dimensions:
Config Links
Link Ref
Name
When Fitted
When Open
PD
Power Down
Modem is Placed in Sleep Mode
Normal Operation
On each Power up with Zulu
WRE
DR1
DR2
Write Enable
Config setting are reset to defaults
Sets Host
Baud
On Power up Zulu Config settings
remain unchanged
DR1
DR2
Baud Rate:
Open
Open
4800
Open
Fitted
9600
Fitted Open
19200
Fitted Fitted
38400
USB / D Links (LK2,3,4,5)
For USB connect all Links from Centre to ’USB’ Side
For RS232 connect all Links from Centre to ’RS232’ Side
Antenna Connector
The connector is a 4mm Screw Thread (Part NO: SCRTM4RA)
Power Connection
Power is only required for RS232 comms, USB connection provides power automatically
Host Terminal Software
Connection to Host is via the micro-USB Cable or RS232 Cable.
Any Terminal emulation program can interface the Eval board, one we have found to be easy to
use and powerful is ‘Terminal’
This can be downloaded from : https://sites.google.com/site/terminalbpp/
https://sites.google.com/site/terminalbpp/
Notes for Optimising Range
In order to obtain the best range
1.
Use max RF Transmit power (set Register R4 = 7)
2.
use the slowest RF comms Rate (set Register R5 = 0)
3.
Power the Eval boards from 12V (don't rely on the USB power)
4.
Consider upgrading the antennas to models with gain.
DS-ZULUM-2
ZULU Modem
Zulu Modem Evaluation Board Schematic
DS-ZULUM-2
ZULU Modem
Reader Response
It is our intention to provide you with the best documentation possible to ensure successful
use of your RF Solutions product.
If you wish to provide your comments on organization, clarity, subject matter, and ways in
which our documentation can better serve you, please email us your comments to the Technical Publications Manager
Application:
Would you like a reply? Y / N
Datasheet:
DS-ZULUModem-1
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
RF Solutions Ltd. Recycling Notice
Meets the following EC Directives:
DO NOT Discard with normal waste, please recycle.
ROHS Directive 2002/95/EC
Specifies certain limits for hazardous substances.
WEEE Directive 2002/96/EC
Waste electrical & electronic equipment. This product must be disposed of through a licensed
WEEE collection point. RF Solutions Ltd., fulfils its WEEE obligations by membership of an approved compliance scheme.
R F Solutions Ltd.,
Unit 21, Cliffe Industrial Estate,
Lewes, E. Sussex. BN8 6JL. England.
Email : [email protected]
http://www.rfsolutions.co.uk
Tel Sales:
01273 898 020
Tel Technical:
01273 898 007
Tel Gen Enq:
01273 898 000
Whilst the information in this document is believed to be correct at the time of issue, RF Solutions Ltd does not accept any liability whatsoever for its accuracy,
adequacy or completeness. No express or implied warranty or representation is given relating to the information contained in this document. RF Solutions Ltd
reserves the right to make changes and improvements to the product(s) described herein without notice. Buyers and other users should determine for themselves the suitability of any such information or products for their own particular requirements or specification(s). RF Solutions Ltd shall not be liable for any loss
or damage caused as a result of user’s own determination of how to deploy or use RF Solutions Ltd’s products. Use of RF Solutions Ltd products or components
in life support and/or safety applications is not authorised except with express written approval. No licences are created, implicitly or otherwise, under any of RF
Solutions Ltd’s intellectual property rights. Liability for loss or damage resulting or caused by reliance on the information contained herein or from the use of the
product (including liability resulting from negligence or where RF Solutions Ltd was aware of the possibility of such loss or damage arising) is excluded. This will not
operate to limit or restrict RF Solutions Ltd’s liability for death or personal injury resulting from its negligence.
Similar pages