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Indian Railway rdso approved items

DTMF BASED ELECTRONIC BLOCK BELL & BLOCK TELEPHONE EQUIPMENT

SPECFICATION No. RDSO/SPN/191/2005 VER 0

DTMF-based electronic block bell and block telephone equipment is meant to be used in the place of conventional block bell equipment and block telephones. This equipment is used for calling by DTMF signaling and communication through 2-Wire or DARK FIBRE  to the other end station where the tone is decoded and an audio-visual indication is activated.

FUSE AUTO CHANGEVOER SYSTEM (FACS)

SPECFICATION No. RDSO/SPN/209/2012 VER 2.0

Fuse Auto Changeover System is designed for mounting on standards relay racks for railway use. With a removable back cover suitable for external wiring. Each panel consists of 8 control cards of Type I and 6 control cards of Type II. Each card contains a microcontroller-based circuit for detection of failure & change over for 4 individual fuses. The control cards are Euro-type Connector for easy maintenance. The power supply for the system can be derived from 90V AC/DC to 120V AC/DC.

QN1 RELAY

SPECIFICATION No. BRS 930

A DC neutral, Non AC Immunised, Tractive armature, Line Relay

This is used for all control and detection Circuits except in external circuits of the AC RE Area. 

The relays covered by this data sheet are for general railway signaling purposes.

  • Modular plug-in design
  • Non-weld contacts
  • Silver and carbon impregnated with silver contact tips
  • Proven reliability
  • Low life cycle cost

QNA1 Relay

SPECFICATION No. BRS 931a

An AC Immunised, DC neutral, Tractive armature, Line Relay

This is used for all control and detection Circuits except in external circuits of the AC RE Area. 

The unit compromises a neutral relay with a-slag and shunt

fitted on to the core, to provide AC immunity to 1000 V AC RMS 50Hz,

  • Modular plug in design
  • Non-weld contacts
  • Silver and carbon impregnated with silver contact tips
  • Proven reliability
  • Low life cycle cost

others items

RS232C TO OPTICAL FIBER CONVERTER

The RS232-to-Optical Converter is used for long-distance end-to-end transmission of RS232 signals over optical fiber, applicable for high integrity data transmission for any electronic device.

The device receives RS232 data at its serial port, converts it to an optical form suitable for transmission over optical fiber at its optical port. Conversely, it receives data from the optical fiber at its optical port and converts it back to its serial port, maintaining the integrity of the original data.

FSK TO OPTICAL FIBER_ CONVERTER

The fiber optic modem converts an Electrical Analog (typically FSK / AM / QAM etc.) into optical signals and transmitted over Single-Mode fiber optic cable, extending these services range up to 15 km (max.) in basic version or up to 40 Km in advanced models. It is designed to provide a cost-effective point-to-point solution for extending the transmission distance and improving the transmission reliability of different analog signals over dark fiber media without involving any Mux / Modem. This fiber optic modem supports different fiber optic interfaces in single or dual core optic fibers and can operate with several grades of fiber optic cable. The basic model is compliant with the fiber usually used in Indian Railways.

SMPS BASED DC TO DC & AC TO DC CONVERTER

  • DC power supplies are power supplies that produce an output DC voltage. Power supplies are devices that deliver electric power to one or several loads. They generate the output power by converting an input signal into an output signal (in this case, a DC output).
  • Electrical outlets deliver alternating current, or ACpower. Most electrical devices require direct current to function. A power supply converts the AC power into DC. During this conversion, the output may waver, occasionally requiring regulation.

Switch Mode Power Supply (SMPS) Transformers

Switch mode power supply (SMPStransformers are a highly efficient form of transformer, used in devices like personal computers. A switch mode power supply is an electronic power supply that incorporates a switching regulator to efficiently convert electrical power.