EmbeddedComms
Specialist in Telemetry, RF Data
Communications, Monitoring & Control Systems

   
     
     
       


RMX232
RM232-151
RM232-173
RM232-433
RM232/BB


   

Index / Radio Modems /
RM232-433 UHF Radio Modem

 

RM232-433
 


RM232-433
RM232-433/W
RM232-433/S

UHF Short range
Radio Modem
10mW

PDF file.User Manual (593K)
PDF file.Datasheet (---K)

RM232 OVERVIEW

The RM-232-433 Radio Modem provides a reliable wireless communications link between two serial devices. The RM-232-433 can be used in a variety of data communications applications that require a simple to use invisible data link.

High speed data streaming permits point-to-point error free transfers upto 14400bps half duplex.

Repeater mode enables the Radio Modem to extend the effective operating range of a point-to-point link by forwarding data packets to a maximum of 3 repeater hops. 

The Radio Modem uses unit & site addressed data packets with error checking and packet acknowledgements to achieve a well managed highly reliable wireless link. The on-air data rate is selectable from 600 to 14400 bps, thus improving network access for multiple point-to-point links within close proximity.

Configure the RM-232-433 for point-to-multipoint broadcast mode and combine with any number of intelligent host computers/ controllers to implement very large networks.

The RM-232-433 Radio Modem supports a range of built-in diagnostic functions that can be used for network interrogation, network problem finding and radio site & range testing.
 

FEATURES

  • Addressable Point-to-Point, Point-to-Multipoint
    and Broadcast Multidrop

  • Licence exempt operation on 433.92MHz

  • Serial protocol. 8 data/1 stop/ no parity

  • DTE Speed selectable 600-115200bps

  • Air data speed selectable  600-14400bps

  • DTE flow control - hardware/software/none

  • 96 byte serial receive/transmit buffer

  • On-air data encryption and 100% code balancing.

  • Range up to 300m with fixed antenna

  • Increased range with external antenna

  • Simple built-in command line configuration

  • Built-in RF link diagnostics

  • Remote over-air unit configuration

  • Front panel modem status indicators

  • Low operating current. Auto standby mode

  • Low profile enclosure with integrated PP3 battery.

  • DIN rail mounting option on SMA model.

  • Uses 9V PP3 battery or 7-15V DC power supply.

OPERATING SPECIFICATIONS

  • Operating voltage of 7 to 15VDC

  • Average current of 36mA (data streaming).

  • Standby current of 15mA.

  • Shutdown current of 440uA, for long-term battery operation (DTR activated).

  • Physical: Width 62mm, Depth 24mm, Height 103mm. (excludes antenna)

  • Operating temperature of 0 to 55 degrees C

RADIO SPECIFICATIONS
  • Radio approval EN 300-220-1,
    ETS 300-683, AS4268.2 
  • 433.920 MHz centre frequency
  • Transmit power 10mW
  • Receiver sensitivity -100dB for 1ppm BER
  • Standard aerial: Fixed stubby helical
  • Aerial option 1: Fixed 1/4 wave
  • Aerial option 2: SMA female connector

OPERATING RANGE

The following table outlines the nominal operating range of the RM232 Radio Modem. Please note that the ranges listed will vary depending on the level of surrounding RF interference, obstacles near or in the line of sight and other environmental factors.

Model and Antenna

Indoor

Outdoor (1)

RM232-433 - Fixed helical

35m

200m

RM232-433/W - Fixed 1/4 wave whip

50m

300m

RM232-433/S + ANT433H-SMA

35m

200m

RM232-433/S + ANT433D-3DB (2)

 

4km (3)

1. Outdoor range testing performed in a central business district environment.
2. The use of high gain antennas may result in radiated power levels exceeding the licensed levels permitted in the country of use.
3. In ideal conditions a fully functional range of >4km has been achieved. Unit A on a 100m hill with line-of-sight to unit B on 100m hill.

ORDERING INFORMATION

For further information and product pricing please contact our sales department. 

Order Number

Description

RM-232-433

RM-232-433 fitted with a fixed stubby  helical antenna.

RM-232-433/W

RM-232-433 fitted with a fixed flexible 1/4 wave whip antenna.

RM-232-433/S

RM-232-433 fitted with SMA socket.

RM-232-433P/S

RM-232-433 fitted with SMA socket. 100mW version.

ANT-433F-SMA

433MHz 1/4 wave flexible whip antenna.  SMA mounting.

ANT-433H-SMA

433MHz Helical antenna. SMA mounting.

ANT-433D-3DB

Industrial end fed 3dB dipole antenna + 2m RG58C unterminated.

PSU-9V03

Plug pack power supply 9V @ 300mA (Available Australia only)

ADP-BNCF-SMAM

SMA Male to BNC female adapter.

ADP-DIN-M5

DIN Rail mounting bracket to suit radio modem.

CBL-D9MF-18

1.8 metre RS232 9 way serial cable

Please note printed manuals are not supplied with the radio modems.  This is available via the link below.