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Telefon PST

Application

The SAT dispatching system is designed to realize high-speed, direct and emergency-dispatching and telephone communications. Importantly, it can work with any type of subscriber telephone exchanges. In addition, the system has been adapted to work in extremely harsh industrial conditions – for example, in mining, petrochemical, chemical and other plants.

Moreover, SAT can be used in environments with high noise levels, high humidity, salinity or dust. In addition, it works well in areas at risk of explosion of methane, other gases and fuel vapors (explosion groups I and IIB according to PN-EN 50014).

Key Advantages

One of the main advantages of the system – especially compared to earlier solutions such as TEDAR or STAR – is the use of distributed control systems. This has resulted in full modular flexibility. In other words, the system can be built in various configurations – from a few to 192NN – and can be freely expanded by networking multiple units.

Equally important, the modular structure of the system has significantly increased its reliability. In the event of failure of one module (with an OSA controller), the others operate without interference. In addition, one of the OSA controllers in the SAT rack acts as a master.

Integration with other systems

The SAT system can also integrate with other devices, such as metanometric or fire control panels or visualization systems. This integration takes place via an external RS485 bus through BUZ external device buffers, or using Ethernet.

Multi-user support

It is worth noting that SAT is equipped with four independent acoustic tracks. This makes it possible for four dispatchers to work simultaneously. In addition, it is possible to connect computers that act as observation stations – but do not have the function of conducting conversations.

SAT-A(alarm) version equipped only with programmable intrinsically safe PST-type sirens

SAT/N-A(non-intrinsically safe alarm) version equipped only with programmable PST-N type sirens

SAT-T(telephone) version equipped only with intrinsically safe TIG-S telephones

SAT/N-T(non-intrinsically safe telephone) version equipped only withTPN-S type industrial telephones

SAT-Z(integrated) version equipped with both PST signaling and TIG-S telephones

SAT/N-Z(integrated non-intrinsically safe) version equipped with both PST-N sirens and TPN-S telephones

Collaboration

With all types of telephone exchanges.

Power supply

Buffer – 48 or 60V DC.

Capacity

  • any in modules of – 16 NN each
  • standard – n x 192 NN

Station equipment

  • SSI-SAT line-separation stand
  • computerized dispatching stations with call recorders
  • PDK-SAT dispatcher desks – up to 3 pcs.
  • SU-SAT maintenance station – 1 pc.
  • SO-SAT observation post – 1 piece.

Underground equipment

  • programmable signallers PST industrial phones
  • TIG intrinsically safe industrial telephones
  • MCCD-01 downhole concentrators.

SAT technical data

SSI-SAT racks feeding48 V DC buffered
Power drawn form the supply source 48 V3 W x No. Of subscribers
Power supply of dispatchers’ desks230 V AC guaranteed
Internal power supply+5, +12, -48 V
Maximum number of dispatcher’s communication lines1040
Levels of conversation signals0.775 V (0dBm)
Maximum voltage in non-spark safe subscriber’s line41 V DC
Maximum voltage in intrinsic subscriber’s line41 V DC
Current efficiency of exchange subscriber’s equipment30 mA
Current efficiency of output circuit of LPI unit35 mA
Current efficiency of output circuit of LPI unitExiaI/IIB acc. to PN-EN50014
Protection degree of PST casingIP65
Protection degree of MCCD-01 casingIP54
Operating temperatures rangefrom +5 °C to +40 °C

Electrical parameters of line units LPI and LM

Current from -48 V inputmax. 50 mA
Current from +12 V inputmax. 50 mA
Telephone line input resistancemax. 600 Ω
Telephone line impedance for 1000 Hz600±50 Ω
Direct voltage at unloaded line outputmax. 41 V
Maximum value of direct current in line45 mA
Level of DTMF signal at line output4±1 dB

OSA technical data

Power supply voltage+5 V
Power consumptionmax. 100 mA
RS485 main conduct protocolMODBUS

Parameters of KTD – computer dispatcher’s communication card

Power supply voltages+5 V i +12 V
Current from +5 V/12 V inputmax. 100 mA/100 mA
Number of control circuits1
Number of telephone line inputs2

Leaflet