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HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system

China Shenzhen City Breaker Co., Ltd. certification
China Shenzhen City Breaker Co., Ltd. certification
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HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system

HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system
HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system

Large Image :  HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system

Product Details:
Place of Origin: CHINA
Brand Name: WLINK
Certification: CE, ROHS
Model Number: WL-D803-4
Payment & Shipping Terms:
Minimum Order Quantity: For WLINK brand, MOQ 1 unit, For OEM MOQ 50 units
Price: negotiation
Packaging Details: One set to one box, 20 units boxes to one carton
Delivery Time: Stock for small quantity, 5-7 working days for bulk order
Payment Terms: TT, L/C, Paypal, Western Union or Cash in advance
Supply Ability: 5000 sets / Per month
Detailed Product Description
Products Name: Industry 3G Modem Configuration: PC Based Configuration Tool
Power Supply: 5 - 32 VDC Application: M2M Field
Type: Industrial Grade Interface: TTL
Frequency Band: HSDPA 900/2100MHz Or 850/1900MHz
High Light:

M2M Cellular Modem


Industrial 4G Modem


HSDPA 3G RS-485 terminal DTU , Cellular Industrial Modem for fire alarm system




The WL-D803 3G serial Modem (also called DTU) can look similar to the common Modems / terminals. Wlink serial to 3G IP modem is a kind of cellular terminal device that provides data transfer function by by mobile HSPDA 3G network.It adopts high powered industrial 16/32 bits CPU and embedded 

real time operating system.The cellular gateway has additional processing capability and built-in software which allows them to operate autonomously as self-managing communications devices.


It supports RS498  (or RS422, RS-232, TTL ) port that can conveniently and transparently connect one 

device to a cellular network, allowing you to connect to your existing serial devices with only basic 

configuration. Once configured, WLINK DTU provide ‘IP’ or internet communications for other devices which have limited or no built-in capability to manage a modem.



  • Optimized EMC design

  • Standard PPP, TCP/IP and UDP/IP protocol

  • Industrial pluggable terminal block

  • Industrial CDMA/EDGE/GPRS wireless module

  • Support APN and VPDN wireless private network

  • Support short message service (SMS)

  • Support transparent data transmission

  • Support data service center with dynamic IP address

  • Support LED status indication

  • Wide range voltage input

  • Smart power management

  • External power on/off control

  • Reliable, flexible and easy to deploy



Multiple operation model
  • Always online: automatically attaches GPRS/EDGE/HSDPA when powered on automatically redials when off line and keep line alive
  • Offline when idle and trigged online by user data, ring or SMS

  • GPRS channel and SMS mutual backup

  • Online/offline control by commands via user equipment

  • Data loop test

Multiple data service centers communications
  • Supports up to 4 data service centers communications
  • Supports main/backup data service centers communications

  • Supports customized setting for each data service center

Flexible and utilitarian data communications
  • Supports TCP/IP, UDP/IP, DDPTM, SMS and AT
  • Self-defines transparent or protocol communications

  • Self-defines customized data frame separator

  • Self-defines reconnecting interval

  • Self-defines heart-beat data frame

Parameters configuration and remote management
  • Built-in parameters configuration menu
  • Configuration tool based on PC

  • Remote parameters configuration via data service center

  • Remote parameters configuration by SMS

  • Parameters configuration via AT+ commands

Full function data service center development kits
  • Provides function development package
  • Provides complete sets of demo source code (VB, VC, C#, Delphi, VB.net)

  • Provides data forwarding service center for data transparency forwarding





  • GSM/GPRS Protocol, 3GPP version 4
  • Frequency Band: HSDPA 850/1900/2100MHz EDGE/GPRS/ GSM 2100/1900/900/850Mhz
  • Output Power
  • GPRS/GSM: 33dBm (Power Class4)
  • GPRS/EDGE: Class 2, Class B
  • Sensitivity:  GSM/GPRS 3GPP TS05.05(R99)
  • IEEE 802.3u


  • Voltage: DC +5~26V (standard 12V/1A power adapter)
  • SIM/R-UIM Card: 3V
  • Consumption: Transfer mode: 70Ma/12v (Average), Idle mode: 17mA/12V (Max)


  • Antenna: SMA-K(Female)
  • Standard SIM/R-UIM interface
  • Serial data interface: RS-232/RS-485/RS-422/TTL, DB9 connector
  • Rate: 300-115200bps


  • Dimension: 70.5mm x 55.5m x 22mm  (not including antenna)
  • Operation temperature: -30~+75℃
  • Store temperature: -40~+85℃
  • Related humidity: <95% (non-condensing)
  • Guarantee: one year




Electric power industry:

  • Electric remote meter reading
  • Substation monitor
  • Power line monitor
  • Switch monitoring system on distribution network column


Water conservancy industry:

  • Water quality monitor
  • Reservoir gate remote control system solutions
  • Water conservancy GPRS scheduling system application solutions
  • Water pipe network monitoring system 5. Reservoir automatic monitoring system


Oil industry:

  • Oil and gas well remote monitor
  • GPRS remote oil field automation monitoring system
  • Gas pipeline network monitoring system solutions


Environmental protection industry:

  • Pollution source monitor
  • Atmospheric environment monitor
  •  Noise monitor
  • Dust monitor


Agricultural applications:

  • Greenhouse remote monitor
  • Aquaculture farmers monitor
  • Water pump monitor and control


Other industries:

  • Warehouse monitor management
  • Remote crane management system
  • Industrial energy consumption monitoring
  • Gas station GPRS data acquisition system
  • GPRS weather information collection system 


Competitive Advantage

  • WLINK Router are Industrial grade design which can endure high and low temperature and other extreme application environment

  • WLINK has ability to produce a quality product at a economic cost to meet the market and project requirement.

  • Strong R&D Team who have 10+ year experience in M2M cellular field

  • WLINK always provide the best pre-sale and after sale service to customer

HSDPA 3G RS-485 terminal DTU Industrial Cellular Modem for fire alarm system 0


Contact Details
Shenzhen City Breaker Co., Ltd.

Contact Person: Mr. fov

Tel: 18810166789

Fax: 86-189-4289-0330

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