Shanghai Nanhua Electronics Co,.Ltd. Company Logo Shanghai Nanhua Electronics Co,.Ltd.
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DT Digital Intercom & Paging System

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Shanghai Nanhua Electronics Co,.Ltd.
[China]

Address
Building 9, No 1755, Wenbei Rd, Jiading District Shanghai Shanghai
Phone
86-21-39126868
Contact name
Jojo Zhu

Quick Information

  • Brand Name: Nanhua
  • Place of Origin: China
  • Model Number : DT

Description

This is Nanhua Electronics' new generation industrial intercom & paging system product. For environments that need independent communication networks, or have heavy EMI, such as ports, ships, power and chemical plants, steel mills, offshore platforms, cranes, tunnels and coalmines.

DSP high speed data processing and voice compressing coding techniques help solve voice quality problems caused electro-magnetic interference, environment noise, cable distance and multiple phone stations.

DT digital broadcasting intercom & paging’s power supply and communication share the same 2-wire cable.  Non-polarity cable connection type, uses central power supply, plug and play, commissioning free, no expertise needed on installation & after-service. All those features can significantly reduce cabling material and installation cost.

Specifications

Description Parameter
Working voltage DC24V
Power supply Central power supply from power supply box
Main power supply AC110V±10% / AC220V±10%
Backup power supply DC24V(provide by user)
Communication distance Set the system power as circle centre, the MAX semi diameter is 400m
System netting numbers Standard for 8 stations MAX:20 stations
Running mode Long-term
Ambient temperature -30˚C ~ +70˚C
Humidity 10% ~ 95% (No coagulation)
IP protection IP65
Material PC+ABS

Functions & Features

  • Connect with one 2-core cable, nice and easy netting
  • Ideal product for harsh environments and various applications
  • Good EMI resistance performance, EMC compatibility
  • Digital signal processing technology, non-loss data condensing makes no voice transmission loss and provide crispy voice quality, support 3 party communication, multi-party communication
  • Broadcasting priority
  • -15dB environment noise threshold value, lower interference
  • Auto switching off if no audio input in 2 minutes and go to sleeping mode
  • Support point-point, cascade and spreading netting
  • Auto power adjustment, auto temperature compensate, auto recover, over load protection, auto mute
  • Adjustable broadcasting volume in different working environment
  • System working voltage 24VDC, input power supply uses AC110V±10% or AC220V±10%; has backup power supply(DC24V battery)connetion terminal, the main power supply can be automatically switch to the backup battery when the main power is not available
  • Any phone station can broadcasting call whole working field, which makes finding someone and making an announcement nice and easy
  • Easy of operation, LED working status indication
  • Mini design of the station box, ABS housing, with nice performance, substantial, and safety to use
  • Indoor station adopts phone and speaker all in one design, easy to installation and operation
  • Outdoor station comes with lock, can work under harsh enviroment.

Operation

  • Gland box with M25 and M20,please make sure the size you need before installation, and special request can be customized.
  • Make sure the leveling of the mounting surface, suggest to fasten the top two screws first, than can adjust whether need to add some spacer based on the leveling, to avoid the distortion;
  • Power supply indicator:Indicator on when there is power input.
  • Off-hook indicator:Indicator on when the handset is off the hook.
  • Broadcast indicator:the indicator has 2 working status.
  • Off: No station is under broadcast.
  • Fixed-on: when no other station is under broadcasting, either push button on the handset, push ”hand-free” button, open “alarm” button, or step on the footstep switch, the indicator will be fixed-on.
  • Flashing: When the station is not under broadcasting, or under broadcasting but no audio input, the indicator will be on and in flashing mode if there is other station start to use broadcast.
  • Loudspeaker volume adjust(See drawing)clockwise turn Outdoor potentiometer, the outdoor speaker volume will be larger, anticlockwise will be lower.
  • Clockwise turn Indoor potentiometer, indoor speaker volume will be larger, anticlockwise will be lower.

Installation

  • +24V,-24V are the two cores of the cable, suggest to use the cable with cross section morethan 1.5m2, system power cable is the communication cable, as use the digital carrier, don’t neet the sheild calbe, suggest the sheild cover floating.
  • As the system power output only with 2 connect terminals, so need the external terminal box, eachstation parallel connected in the terminal box.
  • DT001 and DT002 with the same connect board, the connect terminal+24V- are paralleled connected in side, and to use two pairs of terminal is to convenient to connect the stations, and the station power without polarity, to mark the polarity is just only to easy to maintainess.
  • Normally the station with two way speaker, can drive the built-in and external loudspeaker, but sometimes only use one way, at this time, the DT001 can’t connect external speaker, and should make the NULL marks on the connect terminal board.
  • The driver’s cabinet stations’s connect terminal board in inside the metal station box, and the microphone; should use the sheild cable to connect.

Product File

  • Model: DT001 / DT002 / DT003 / DT004
  • On Stream Date: Aug., 2009
  • Applications: Digital intercom is network communication system designed for harsh environments and work site with strong EMI, like port, power plant, mining, chemical plant, hoisting machinery, railway tunnel, Steel and Iron Works, etc.
  • Standard:
  • Certificate: CE
  • Patent: ZL 2010 3 0630118.5(Outdoor Station)
  • Improve Records: 
  • Fault Records:
  • Quantity/Delivery Day: 

 


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