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Specialist in Telemetry, RF Data
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RMX232
RM232-151
RM232-173
RM232-433
RM232/BB


   

Home / Radio Modems /
RM232-151 VHF Radio Modem

 

RM232-151
 


RM232-151.300
RM232-151.600
RM232-151.275

VHF Short range
Radio Modem
100mW

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

RM232-151 OVERVIEW

The RM232-151 Radio Modem provides a reliable wireless communications link between two serial devices. The RM232-151 can be used in a variety of data communications applications that require a simple to use invisible data link.

Repeater mode enables the Radio Modem to extend the effective operating range of a point-to-point link by forwarding data packets over 1 repeater hop.

The Radio Modem uses unit & site addressed data packets with error checking and packet acknowledgements to achieve a well managed highly reliable wireless link.

Configure the RM232-151 for point-to-multipoint broadcast mode and combine with any number of intelligent host computers/controllers to implement very large networks.

The RM232-151 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 151.30MHz

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

  • DTE Speed selectable 300-57600bps

  • Air data speed selectable  300-2400bps

  • DTE flow control - hardware/software/none

  • 96 byte serial receive/transmit buffer

  • On-air data encryption and 100% code balancing

  • Range up to 4km outdoors

  • 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.

  • 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 300 220-3,
    EN 300-489-3, AS4268.2 

  • 151.300 MHz centre frequency

  • Transmit power: 10mW standard

  • Transmit power: 100mW /SH

  • Receiver sensitivity -116dB for 1ppm BER

  • Standard aerial: SMA female connector

OPERATING RANGE

The following table outlines the nominal operating range of the RM232-151 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)

RM-232-151/S - Half wave dipole

100m

2 km

RM-232-151P/S - Half wave dipole

-

4 km

1. Outdoor range testing performed in a rural environment using a ground independent half wave dipole antenna.
2. In ideal conditions a functional range double those quoted have been achieved. Antenna A mounted 12m with line-of-sight to antenna B at 4m.

ORDERING INFORMATION

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

Order Number

Description

RM232-151/S

RM232-151 fitted with SMA socket.

RM232-151P/S

RM232-151 fitted with SMA socket. 100mW high power.

ANT-151H-SMA

151MHz Helical antenna. SMA male mount.

ANT-151D-HI

Ground independent 1/2 wave dipole + 2m RG58C terminated with SMA.

ADP-BNCM-SMAM

SMA Male to BNC female adapter.

ADP-DIN-M5

DIN rail mounting bracket to suit modem.

PSU-9V03

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

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.