DS-ZULUM [RFSOLUTIONS]
Radio MODEM Module; 无线调制解调器模块
| 型号： | DS-ZULUM |
| 厂家： | 
RFSOLUTIONS.LTD |
| 描述： | Radio MODEM Module |
| 文件： | 总12页 (文件大小：3194K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ZULU M
Radio MODEM Module
Features
Intelligent RF Modem Module
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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)
Receiver Sensitivity –121dBm
Applications
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Remote Networking
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 op-
eration 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 multi-
node 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
DS-ZULUM-2
Radio Modem Module SMT Package
ZULU Modem
Pinout
Pin Description
Pin No
Name
Direction
Description
1
ANT
In
In
Antenna Input / Output 50ohm Impedance
Connect to Ground
2, 15
GND
3-5,
11,
13-14,
20-24
N/C
N/A
Unused Leave Disconnected.
6
7
RX
TX
In
Out
In
(Low Level RS232) Data in
Low Level RS232 Data Out
Connect to LINK on Pin 28
Low Level RS232 CTS
8
LINK
CTS
9
Out
In
10
12
16
17-18
RTS
Low Level RS232 RTS
RESET
Vcc
In
Device Reset Input (Tie High via 10K Resistor)
+2.2-3.6v
In
DR1-DR2
In
Host Data Rate selection.
When High configuration data is held in EEPROM.
When Low configuration data is held in volatile memory
and lost on power cycle.
19
WRE
In
25
PD
In
Power down mode. Take low to enter Sleep mode
26
27
TX LED
RX LED
LINK
Out
Out
Out
In
RF TX LED indicator
RF RX LED indicator
28
Connect to LINK on Pin 8
29-30
XTAL1-2
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:
Data Bits:
Parity:
Defined by DR1 and DR2 Pins
8
None
Stop Bits:
Flow Control:
1
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
Vcc / Unconnected
GND
Vcc / Unconnected
GND
4,800
9,600
19,200
38,400
GND
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 (Non-
Volatile) or RAM (Volatile) Un-used. Thiis may be ignored unless the application requires specif-
ic 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 han-
dles 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;
One-to-One operation; for point to point data communication
One-to-Many; A network consisting a master and many slaves (the receivers all have the same
address)
Many-to-One; where the transmitters all send to a single receiver address.
Because each ZULU MODEM can contain a unique address, multiple ZULU networks can co-
exist 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 com-
mands 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 da-
ta 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
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.
+++
Zulu responds with Status info
Zulu responds with all Register Values
?
retrieve the current register values
set factory defaults;
R1=7F7F7F
R2=7F7F7F
F
R3 = Ch2 (869.450MHz)
‘OK’
R4 = 7
R5 = 1
(+20dBm)
(19K2)
H
Help
Brief description of commands available
The originating Zulu Modem will respond
with the Recipient Zulu Modems’ response,
eg.
Ping Mode
This sends a ping request .
Received from 7F7F7F (D5)
Where
On receiving, the recipient Zulu Modem
will respond with its address and the level
of RSSI (Received Signal Strength)
The Ping command is continuously repeat-
ed every 1 second until any command or
character is entered.
7F7F7F = the recipient Address
D5= RSSI
P
RSSI
Is a Hex value corresponding to the re-
ceived signal strength
Min = 20hex
Max =E0hex
S
S
Save Configuration
‘SAVED’
exit configuration mode and return to
online mode
Q
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’
Value Range
Example
Register
Description
0000 - FFFFFF
(24 bit address)
R1=0001
(Data sent is addressed to Zulu
MODEM with address 0001)
Sets the recipient Zulu MO-
DEM Address
R1
0000 - FFFFFF
(24 bit address)
R2=F001
(Data sent is from Zulu MODEM
with address F001)
Set own Zulu Modem
address
R2
R3
CH0 = 868.400 MHz
CH1 = 868.900 MHz
CH2 = 869.450 MHz
CH3 = 869.600 MHz
CH4 = 869.800 MHz
R3=2
Set RF channel
(Transmit on Channel 2)
0 = +1dBm
1 = +2dBm
2 = +5dBm
3 = +8dBm
4 = +11dBm
5 = +14dBm
6 = +17dBm
7 = +20dBm
Set the RF Transmit Power
output*
R4=7
R4
R5
(sets Transmit Power to max)*
0 = 9,600
1 = 19,200
2 = 28,800
3 = 56,000
R5=3
(sets the RF data rate to
56Kbps)
Set the RF baud rate*
Channel Number
Frequency
Centre (MHz)
EU Power Allowance
mW / dBm
Notes
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
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 imple-
menting your RF Application. A rough guidance applicable to the ZULU channel numbers is giv-
en below
*Note :
Reducing Tx power reduces battery consumption!
Reducing the baud rate will increase the range!
DS-ZULUM-2
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 ra-
dio 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 atmos-
pheric 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 gen-
eral 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: Storage –50 to +125oC.
Weight: SMT version 7grams, DIP Part 13grams
Parameter
Min
Max
4.0
Units
V
Supply Voltage
Voltage on any Input
Vcc > 2.2
Vcc < 2.2
5.8
V
V
Vcc +
Max Input power (thro Antenna)
+5
dBm
Parameter
Min
1.8
Typical
Max
3.6
Units
V
Supply Voltage
Operating Temperature
-40
+85
oC
Zulu Tx Supply Current:
When Transmitting (At Max Power)
When sleeping
85
1
mA
uA
Zulu Rx Supply Current:
When Receiving
18.5
1
mA
uA
When sleeping
AC Characteristics
Parameter
Min
868
-40
Typical
Max
870
+85
Units
MHz
oC
Operating Frequency—see freq channel setting
Operating Temperature
Band width per channel
Deviation
100
45
KHz
KHz
dBm
Zulu Tx MAX Output Power
+20
56
Zulu Tx—Rx FSK Raw RF Data Rate
Zulu Rx Sensitivity
9.6
Kbps
dBm
-121
DS-ZULUM-2
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
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Direct Connection to RS232 / USB
9-12Vdc Power in Screw Terminal
LED Indication Transmit / Receiver
User Config Jumper Links
Part No
Description
ZULUEVAL-M
Zulu Modem Eval Board
PSU-12V100MAUK
Plugtop Power Supply 12V 100mA
DS-ZULUM-2
ZULU Modem
EVAL Board Configuration
Power Requirements: 9-15Vdc
Weight: 27grams, Dimensions:
Config Links
Link Ref
PD
Name
When Fitted
When Open
Power Down
Modem is Placed in Sleep Mode
Normal Operation
On each Power up with Zulu
On Power up Zulu Config settings
remain unchanged
WRE
Write Enable
Config setting are reset to de-
faults
DR1 DR2
Open Open
Open Fitted
Fitted Open
Fitted Fitted
Baud Rate:
4800
DR1
DR2
Sets Host
Baud
9600
19200
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.
2.
3.
4.
Use max RF Transmit power (set Register R4 = 7)
use the slowest RF comms Rate (set Register R5 = 0)
Power the Eval boards from 12V (don't rely on the USB power)
Consider upgrading the antennas to models with gain.
DS-ZULUM-2
ZULU Modem
Zulu Modem Evaluation Board Schematic
DS-ZULUM-2
ZULU Modem
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Datasheet:
DS-ZULUModem-1
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R F Solutions Ltd.,
Unit 21, Cliffe Industrial Estate,
Lewes, E. Sussex. BN8 6JL. England.
Email : sales@rfsolutions.co.uk http://www.rfsolutions.co.uk
Tel Sales:
Tel Technical: 01273 898 007
Tel Gen Enq: 01273 898 000
01273 898 020
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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 them-
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