STORM-433F [RFSOLUTIONS]
‘STORM’ RADIO MODEM RS232 / USB; “风暴”电MODEM RS232 / USB
| 型号： | STORM-433F |
| 厂家： | 
RFSOLUTIONS.LTD |
| 描述： | ‘STORM’ RADIO MODEM RS232 / USB |
| 文件： | 总6页 (文件大小：73K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
‘STORM’ RADIO MODEM RS232 / USB
• Selectable Host Baud Rate 1200bps – 38.4Kbps
• USB or RS232 Cable Replacement
• Range up to 150 Metres
• European Operation 433 or 868MHz
• Narrow Band RF
• RF Data Rates to 100 kbps
• One to Many, Many to One
• 12V or USB Power
• Conforms to ETSI 300-220
• Requires no radio licence to operate
• ABS enclosure
Description
The RF Solutions STORM radio Modem is a simple to use and very versatile device. It can operate as a
one to one cable replacement link, in multiple master/slave arrangements or in broadcast modes. The
Small modem come in an ABS enclosure with external antenna and easily achieves a range of 150m.
Multiple connection options allow it connect to a PC or act as an M2M link via USB or RS232 with power
though the data cable or via an external 12V DC supply.
Operation Modes
One-to-One operation; for point to point data communication
Broadcast Mode ; where a single master address many Storm Modem Modems concurrently. (using many
Storm Modem Modems set to the same address),
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 Storm Modem can contain a unique address, multiple Storm Modem networks can co-exist in
the same area.
Ordering Information
Part Number
Description
STORM-433F
Modem RS232, 433MHz 150Metres
PSU-CAB666
Serial cable and power supply (pin 9 on serial cable powers the modem)
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 1
‘STORM’ RADIO MODEM RS232 / USB
Connections and Set-up
USB Connector
The Storm Modem interfaces to the host computer via a USB Type A connector.
RS232 Connector
The RF Modem interfaces to the host computer via an RS232 connection using a standard DB9 connector
with pin out as shown in the diagram below.
PC Serial Port
DTE
(DB25)
RF STORM Modem
PC Serial Port
DTE
RF STORM Modem
(DB9F)
(DB9F)
(DB9)
8
3
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
Tx
2
3
4
5
6
7
8
9
Tx
2
Rx
Rx
20
7
DTR
DTR
GND
GND
6
RTS
4
RTS
5
CTS
CTS
22
POWER
POWER
Power supply
For USB comms, power is automatically obtained from the USB connection. (No external power
required)
For RS232 comms external power is required. Power is provided by either J6 (as shown above) or by a
special serial cable RFS part number PSU-M433UK
The PSU-M433UK power supply and serial cable supplies pin 9 of the 9 way Sub D connector with 12
Volts DC.
Serial Data
Data Bits:
Parity:
Stop Bits:
Flow Control:
8
None
1
None
Host
Baud Rate
OPT 1
OPT 2
Open
Open
Fitted
Fitted
Open
Fitted
Open
Fitted
4,800
9,600
19,200
38,400
(Factory Setting 19,200Kbps)
Status LED’s
The RF Modem circuit board has three LED’s, representing the following signals:
•
•
•
PWR – Power on
Tx – Transmitting data
Rx – Receiving data
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 2
‘STORM’ RADIO MODEM RS232 / USB
Configuration
The configuration of the STORM modem may be changed by placing it in Configuration mode, then sending a
set of configuration data bytes to the module on the Tx pin.
To place the STORM modem in Configuration mode the user needs to send “+++” (three plus characters)
within the 10mS timeout for each character. The STORM responds by returning it’s current set of
Configuration data bytes. The STORM Modem is now on Configuration mode.
To exit Configuration mode the user needs to send “---“ (three minus characters) within the 10mS timeout for
each character. The STORM will not return a response. The STORM is now in data mode.
Byte
Name
Description
Default Supplied Value
0
1
2
MSB
7E hex
7E hex
7E hex
Destination Address
3
4
5
6
7
8
LSB
7E hex
7E hex
MSB
7E hex
STORM Address
RF Channel
Tx Power
7E hex
LSB
100 kHz step offset from 422.4MHz
0 = -10dBm
7E hex
107 (433.1MHz)
1 = -2dBm
9
0 (-10dBm)
2 = +6dBm
3 = +10dBm
10
11
Tx data packet size
Rx data packet size
3 – 31 bytes
30 bytes
30 bytes
3 – 31 bytes
The RF Channel is calculated as:
433 MHz working frequency: Config value (decimal) = (desired RF frequency - 422.4MHz) * 10
868 MHz working frequency: Config value (decimal) = [(desired RF frequency / 2) - 422.4MHz] * 10
Please Note, the calculated value must be converted into hexadecimal format.
While the STORM is in configuration mode it will send the current configuration back to the host each time a
data packet is received. To retrieve the current configuration without changing any options the host can send a
single byte to the modem and wait for the response.
It is not necessary to send all configuration bytes to the modem, but all data sent must be valid. For example
to change the destination address the host may just send four bytes. Configuration data excluded from the end
of the data stream will be unchanged. The STORM modem will accept a short configuration when a 10ms
timeout after the last byte sent to the module expires. This allows for the host to easily change the destination
address of the RF data packet, thus enabling one STORM to send individual data to several different recipient
modules.
A destination address of 00000000 will reset the STORM to the default settings shown above.
RF data packets received by the STORM with the embedded destination address which matches the STORM
address will be accepted, processed and passed to the host, all of the RF data packets will be ignored.
When configuring the destination or STORM address an incorrect number of bytes for an address will leave
the current address unchanged.
An invalid Transmitter Power or Packet Size setting will leave the current setting unchanged.
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 3
‘STORM’ RADIO MODEM RS232 / USB
Operational notes
RF data packets received by the Storm Modem with an embedded destination address which matches the
Storm Modem address will be accepted, processed and passed to the host, all other RF data packets will be
ignored.
The size of RF data packets is set during configuration. If fewer bytes are received by the Storm Modem than
the preset size, then after 10ms from the last byte received from the host, the RF packet will be processed and
transmitted anyway, (the data is expanded to meet the preset packet size).
The RF data packet size must be set the same for transmitter and receiver; otherwise the received packets will
be discarded.
In order to optimise data rate, in a point-to-point configuration where data is mostly being sent in one direction,
the packet size for one data direction can be set to the maximum size, however the reverse direction may be
set to a smaller packet size, to implement an acknowledge reply for example.
The Storm 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 Storm Modem will store a max of two data packets (2 x 31 bytes),
all further data packets received will be discarded.
Each Storm Modem has its own preset address. This is set during configuration. Any data received is
examined and the address header embedded within the data packet is compared with the Storm Modem
address. Only data received with matching address will be processed and output to the host, all other data will
be discarded.
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 4
‘STORM’ RADIO MODEM RS232 / USB
STORM Configuration Utility
The STORM modem can be easily configured using the STORM Configuration Utility available from
the RF Solutions Website.
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 5
‘STORM’ RADIO MODEM RS232 / USB
1.1
Technical Specifications
Absolute Maximum Ratings
Operating temperature:
Storage temperature:
Supply Voltage
-10 0 C to +70 0 C
-40 0 C to +100 0 C
11.1 to 25.6V
Data input
±15V (RS232 serial levels)
Electrical Characteristics
Min.
11.1
Typ.
12
Max.
25.6
Units
Notes
DC Levels
Supply voltage
V
1
Supply current (Transmit mode)
Supply current (Receive mode)
Supply current (Standby mode)
11
45
mA
mA
uA
12.5
125
RF
Working frequency
430.0
433.1
-100
+10
+/- 50
100
440.0
MHz
dBm
dBm
kHz
2
Receiver sensitivity
Transmitter RF power out
Frequency deviation
GFSK Manchester encoded data rate
kbps
Dynamic Timing
Power up to stable receiver data out
Power up to full RF out
Standby to Receive mode
Standby to Transmit mode
30
30
1
mS
mS
mS
mS
1
CTS timing
With a standard buffer size of 30 bytes, CTS is asserted 41uS after the buffer is full. In cases
where less than 20 bytes are sent CTS is asserted after a timeout of 10mS.
otes
1. Supply voltage should have <10mV ripple.
2. The application operating frequency must be chosen to comply with the Short Range
device regulation in the area of operation.
For more information or general enquiries, please contact
R. F. Solutions Ltd.,
Unit 21, Cliffe Industrial Estate,
South Street,
Lewes,
E Sussex, BN8 6JL. England
Tel +44 (0)1273 898 000
Fax +44 (0)1273 480 661
Email sales@rfsolutions.co.uk
http://www.rfsolutions.co.uk
WEE Disposal: Products supplied from 15th August 2005 that have reached the end of their life may be
returned at the customers cost to be processed within WEEE regulations. Please clearly labelled “WEEE”
Information contained in this document is believed to be accurate, however no representation or warranty is given and R.F. Solutions Ltd. assumes no liability with respect to the accuracy of such information.
Use of R.F.Solutions as critical components in life support systems is not authorised except with express written approval from R.F.Solutions Ltd.
DS Storm-b May 08
©2008 Reg. No. 227 4001, ENGLAND
Page 6
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