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:

  • This Model Currently Not Available - NOT AVAILABLE AT THIS TIME
  • SD-270 Series User Manual
  • 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)
  • Call for Assistance
  • Pay using PayPal: You do not need a PayPal account to order using PayPal. All Credit/Debit Cards accepted. no PayPal account needed


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 Data Telemetry Radio CTCSS/DCS DE-15 & Modem(option)

  • Brand: Maxon America, Inc.
  • Product Code: SD-274 U1
  • Availability: Maxon Factory - This item currently not available / will be released ASAP
  • $0.00


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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