Information and specifications page for the SD-274 U1Options and Accessories: Please scroll down to view related items.

SD-274 U1 UHF 400-440 MHz

The Maxon SD-270 Series of radios are durable, reliable and designed to meet the needs for a variety of wireless applications. Include the optional GMSK (9600 Baud Rate) or the 4FSK (19200 Baud Rate) modem boards to add even more diversity to this cost effective radio.
The modules incorporate the most requested mechanical footprint and BNC antenna connection. Transmit power settings from one to five provide the power needed on any job and the LED indicator gives instant on-sight status of the radios operation. Combine that with low current drain and fast transmitter/receiver attack times for operation in the harshest of system demands. The die cast aluminum cabinet/lid provides resistance to RF interference; and gives exceptional environmental durability in the most extreme conditions.
Whether implementing a new system or installing into an existing system, the Maxon family of data telemetery radios have been the choice of OEM and end-users worldwide for over 25 years.

This diagram shows a typical water control system using data radios like the Maxon SD-274 U1Maxon's 3 year warranty and FCC, European Conformity and Industry Canada Certification logos certifies that the electromagnetic interference, safety, manufacture and other quality parameters have been met by the Maxon SD-274 U1

Features:

  • Synthesized Frequency Tuning
  • 1 or 5 Watts RF Output
  • 136-174 MHz VHF - V2
    400-440 MHz UHF - U1
    (Current Model listed on this page)
    430-470 MHz UHF - U2
    450-490 MHz UHF - U3
  • Programmable up to 16 Channels
  • 16 Channels (Dip Switch Select)
  • Programmable Wide/Narrow Band
    12.5/25 kHz Channel Spacing
  • Operates from 9V to 18 VDC
  • CTCSS/DCS Encode/Decode
  • Modem Options * (GMSK/4FSK)
    ACC-213 GMSK 9600 Baud
    ACC-214 4FSK 19200 Baud
  • Supports 19200 bps Data Rate
  • External Software Channel Steering
  • 6 Programmable Squelch Levels
  • Variable Speaker Output
  • LED Status Indicator
  • Die-Cast Aluminum Housing
  • Time-Out-Timer Function
  • DB-15 Female Connector
  • PC Programming via Software and Cable (optional)

    Applications:
    Water/Waste Treatment Plants
     Oil and Gas Field SCADA
     Security/Alarm System
     Gate Systems
     Remote Controls
     Commercial Sign Control
     Automatic Vehicle Location
     Murphy/Kill Switches
     Weather Monitoring
     Irrigation Systems
     Emergency Call Boxes
     Low Power Repeaters


    General Specifications  
    Parameter: Maxon VHF SD-271V2 Maxon UHF SD-274U1/2/3
    Frequency Range 136-174 MHz 450-490 MHz U3
    430-470 MHz U2
    400-440 MHz U1
    FCC ID Number UU3FC302VD UU3FC302U2 (U2)
    FCC Parts Parts  22, 74, 90, 210
    Channels 1 to16 dip switch selectable
    Channel Spacing 12.5/25 KHz
    Channel Stepping

    2.5, 5, 6.25 KHz

    Channel Spread 38 MHz 40 MHz
    Frequency Stability

    <±5.0 ppm

    <±2.5 ppm

    Operating Temperature

    -22° to +140° F (-30° to + 60° C)

    LED Status

    Green - Receive / Red - Transmit

    Input Voltage

    9-18 V DC, 12V nominal

    Current Drain @9V

    TBA

    Current Drain @12V 65 mA Standby / 2.0A Tx Hi / 1.0A Tx Low
    Current Drain @18V

    TBA

    Tx Duty Cycle

    35% @ Temp Range Listed/Tx [max settings]

    Dimensions [LWH]

    4.6 x 2.4 x 1.4” (117x62x35 mm)

    Weight

    9.4 oz. (267 g.)

    Materials

    Die-cast Aluminum

    IC Certification Number

    TBA

    TBA

     
    Receiver Specifications
      Maxon VHF SD-271V2 Maxon UHF SD-274U1/2/3
    Frequency Stability <±5 PPM <±2.5 PPM
    Sensitivity (12dB SINAD) <-119dB Extreme <-115dB <-119dB Extreme <-115dB
    Sensitivity (20dB Quieting) TBA
    Selectivity >60dB (25 KHz) / >50dB (12.5 KHz)
    Spurious Rejection

    > -70dB

    Intermodulation

    > -65dB

    Audio Output

    0.5 Watt @ 8 ohms

    Audio Distortion

    < 5% @ 1 KHz

    Hum & Noise

    <5%

    Input Impedance 50 ohms
     
    Transmitter Specifications
      Maxon VHF SD-271V2 Maxon UHF SD-274U1/2/3
    RF Power Output.

    5~1 Watt Programmable

    Frequency Stability > ±5 PPM > ±2.5 PPM
    Modulation 11K0F3E / 16K0F3E
    Spurious & Harmonics -36dBm
    FM Hum & Noise

    >40dB (12.5 kHz), >45dB (25 kHz)

    TX Attack Time <5 ms
    Adj. Channel Power -70dB (25 kHz), -65dB (12.5 kHz)
    Audio Response 300Hz - 3 kHz +1, -3dB (25 kHz) / 300Hz - 2.55 kHz +1, -3dB (12.5 kHz)


    NOTE: Some features indicated by specifications listed are prohibited by FCC rule and are not available on models sold in the U.S. or its territories. Note: Features and specifications subject to change without notice.

Maxon SD-274 U1 - UHF 400-440 MHz CTCSS/DCS DE-15 & Modem(option)

  • $199.00


  • 10 or more $185.00
  • 20 or more $170.00

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Tags: SD-274 U1, VHF, CTCSS, DCS, Modem, de-15, db-15, db15, de15, sd-270, sd274, sd-274, sd270, maxon, data, radio