ICPDAS RFU-433 User manual

RFU-433 User Manual
433 MHz RS-232/RS-485 Wireless Modem
Dec. 2018, Version 1.00

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：2
Warrany
All products manufactured by ICP DAS are warranted against defective
materials for a period of one year from the date of delivery to the original
purchaser.
Warning
ICP DAS assumes no liability for damages consequent to the use of this
product. ICP DAS reserves the right to change this manual at any time
without notice. The information furnished by ICP DAS is believed to be
accurate and reliable. However, no responsibility is assumed by ICP DAS
for its use, nor for any infringements of patents or other rights of third
parties resulting from its use.
Copyright
Copyright © 2017 by ICP DAS. All rights are reserved.
Trademarks
Names are used for identification purposes only and may be registered
trademarks of their respective companies.
Contact Us
If you have any questions, please feel free to contact us via email at:
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RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：3
Table of Contents
1. Introduction .....................................................................................4
1.1 Features........................................................................................5
1.2 Specification..................................................................................6
1.3 Dimensions ...................................................................................8
1.4 Appearance...................................................................................9
2. Configuration.................................................................................11
3. RFU-433 Utility...............................................................................14
4. Application Example.....................................................................15

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：4
1. Introduction
The RFU-433 is an RS-232/RS-485 to 433 MHz radio modem that can
be used to convert data from an RS-232/RS-485 device to RF message
and transmitted in transparent mode via the 433 MHz ISM frequency
band.
The RFU-433 provides a maximum line of sight (LOS) transmission
distance of 500 meters at an RF Baud Rate of 9600 bps. In order to
overcome the interference that may be encountered in harsh
environments, the RFU-433 allows the RF transmission Baud Rate to be
configured to a minimum of 650 bps, enhancing the capability of the
modem to resist noise and other interference. Additionally, the RF
channels and Group IDs are adjustable, which is helpful when attempting
to avoid interference encountered when two RFU-433 networks are
adjacent. The 16 RF channels and 8 Group IDs can be configured in order
to distinguish and control the different RFU-433 networks. The majority of
these configuration parameters can be adjusted using a combination of
the Rotary and DIP switches, thereby providing a simple method of
maintaining the system if the RFU-433 modem needs to be replaced.

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：5
1.1 Features
433 MHz Radio Frequency
16 RF channels with 100 kHz channel spacing
Provides RF Baud Rates from 650 to 57600 bps
RF output power default 10 dBm, maximum 19 dBm
Wireless line of sight (LOS) transmission range of up to 1000 meters
at an RF Baud Rate of 9600 bps
Transparent transmission mode
Message package is up to 512 bytes
Provides Baud Rates from 1200 to 115200 bps for both the RS-232
and RS-485 interfaces
ESD Protection: Contact +/-4 kV
Isolation: 3000 VDC for DC-to-DC, 2500 Vrms using a photocoupler
DIN-Rail Mountable
Operating Temperatures, -25°C ~ +75°C

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：6
1.2 Specification
RF Interface
Radio Frequency
433.1 MHz ~ 434.6 MHz
Channels
0 ~ 15 (default is 4, configured by utility)
Baud Rate
650 ~ 57600 bps
Transmission Power
Default 10 dBm, Max 19 dBm
Antenna
0 dBi Omni directional, RPSMA
Transmission Distance (LoS)
1000 m (at 9600 bps RF Data Rate )
Group ID
0 ~ 7
Protocols
Transparent transmit
Repeater
Support repeater mode
Temporary Buffer Size
512 Bytes
COM Port Interface
RS-232
TxD, RxD and GND
RS-485
D+, D- ; 3000 VDC for DC-to-DC
Baud Rate (bps)
1200 ~ 115200 bps
Data Format
N,8,1 / O,8,1 / E,8,1
LED Indicators
RF_Tx
Green (RF Transmit)
RF_Rx
Yellow (RF Receive)
PWR
Red (Power)
Isolation
Intra-module Isolation
2500 Vrms for photocoupler (COM Port)
EMS Protection
ESD
+/- 4 kV Contact
EFT
+/- 1 kV
Surge
+/- 1 kV
Power

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：7
Input Voltage Range
+10 VDC ~ +30 VDC
Power Consumption
1 W @ 24 VDC
Mechanical
Dimensions (W x L x H)
( not include antenna )
108 mm x 84 mm x 33 mm
Antenna Dimensions (L x Ø)
108 mm x 10 mm
Installation
DIN-Rail
Environment
Operating Temperature
-25℃~ +75℃
Storage Temperature
-30℃~ +80℃
Relative Humidity
10 to 90% RH (Non-condensing)

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：8
1.3 Dimensions

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：9
1.4 Appearance

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：10
Terminal Block
LED Indicator
LED
Behavior
Description
PWR
On
+10 ~ +30 VDC Power On
Off
Power Off
RF_Tx
On
RF is transmitting data
Off
RF is no data to transmit
RF_Rx
Always On
RF is receiving data, signal strength high
100ms Flash
RF is receiving data, signal strength middle
500ms Flash
RF is receiving data, signal strength low
Off
RF is no data to receive
Pin
Description
RxD
RS-232
TxD
GND
F.G.
Frame Ground
D-
RS-485
D+
GND
Power:
+10 ~ +30 VDC, 1A
+Vs

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：11
2. Configuration
Most the configurations of RFU-433 are used dip switch and rotary
switch. About these settings are show as below:
COM Baud Rate
Switch Name
Number
Baud Rate (bps)
COM Rate
0
115200
1
57600
2
38400
3
19200
4
9600
5
4800
6
2400
7
1200
8 ~ E
Reserved
RF Baud Rate
Switch Name
Number
Baud Rate (bps)
RF Baud Rate
0*
Auto set the same with COM Baud Rate
1
57600
2
38400
3
19200
4
9600
5
4800
6
2400
7
1200
8
650
9 ~ E
Reserved
F
Firmware version
* If COM Baud Rate is 115200 bps, the RF Baud Rate will set to 57600 bps.

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：12
Group ID
Switch Name
Switch
Group ID Number
Group ID
0
1
2
3
4
5
6
7
* RFU-433 with different Group ID cannot communicate with each other.

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：13
COM Data Format
Switch Name
Switch
Data Format
COM Data Format
N, 8, 1
O, 8, 1
E, 8, 1
Repeater Mode
(RSSI Enable) *
* The repeater mode can bypass RF message from one side to another
and output RSSI data to COM. For example, if the repeater received a
message "0x01 0x02 0x03 0x04", then the repeater will transmitted the
same message to RF. At the same time the repeater will add two RSSI
data byte below the message such as "0x01 0x02 0x03 0x04 0x63 0x75"
and output to COM. The RSSI 0x63 is the message source side RSSI and
the RSSI 0x75 is the repeater itself. Note, the RSSI value is from 0x00 to
0xFF and 0xFF is the best.
Setting Switch
Switch Name
Switch
Description
Set *
Utility Setting Mode
Run
Normal Run Mode
* In set mode, user can configure “Channel”, “Output Power”and
“Message Duty”, through RFU-433 Utility.

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：14
3. RFU-433 Utility
When RFU-433 utility connects with RFU-433 in set mode through COM
port. The utility will get the RFU-433 firmware version and configuration.
User also can change the RF communication frequency to RFU-433
through the utility.
Open COM Button: Open COM port and connect to RFU-433.
Close Button: Close COM port.
Product: Here will show the module name and firmware version.
Setting Function: It includes "Hardware Setting" and "Software Setting".
For "Hardware Setting", the "Channel" is 433.5000 MHz, the "Output
Power" is 10 dBm and the "Message Duty" is enable.
Channel: For RFU-433, RF channel is 433.1000 MHz ~ 434.6000 MHz.
Output Power: The RF output power is from 0x00 ~ 0x7F. Default is 10
dBm and 0x7F is max (19 dBm).
Message Duty: Message duty means the minimum time interval for RF
message. The "next" time interval is 10 times the "current" RF message
Tx time. For example, if current transmission RF message is 20 bytes
with 9600 bps, the Tx time is about 20 ms, so the next time the
RFU-433 can transmit RF message is after 200 ms. That is to say the
message duty is 10%.
Write Setting Button: Click it to set all setting on the "Write
Configuration" panel to the module and read back on "Read
Configuration" panel.

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：15
4. Application Example
1 - 1 Transfer
PC controls RS-485 modules 1 ~ 3 through RFU-433.
1 - Multi Transfer
PC controls RS-485 modules 1 ~ 3 through a RFU-433 and modules 4 ~ 6
through another RFU-433

RFU-433 (433 MHz RS-232/RS-485 Wireless Modem) User Manual, Version 1.00
Copyright © 2018 ICP DAS Co., Ltd.All Rights Reserved. Page：16
Repeater Mode
PC cannot monitor the thermometer and hygrometer directly because the
distance is too far. But the repeater can bypass the RF message one side to
another and let PC can monitor the thermometer and hygrometer.
RSSI Test
User can use repeater mode to check the RSSI value.