Introduction to KTH-104 Explosion proof Telephone Terminal

KTH-104 type intrinsic safety automatic telephone


Safety coupler





The intrinsic safety automatic telephone adopts modern electronic technology and fully integrated circuits, and is a high-performance and highly reliable communication terminal. It is also a safety coupler that can be connected to various existing ground switches or dispatch switchboards to form a coal mine underground production scheduling communication system.
Scope of application: Subway, light rail, highway, power plant, water plant, chemical plant, mine, etc
Main features of the product:
Shell: Made of aluminum alloy, with strong anti riot properties and reflective function, easy to find (optional);
Door cover: with automatic positioning and automatic closing functions, convenient to use;
Handle: made of special engineering plastic, with strong resistance to impact, tension, and explosion;
The handle receiver, keyboard, buzzer, circuit board, and all accessories of the casing adopt a multi-layer waterproof and dustproof structure. It has three-level waterproof and dustproof functions, and the whole machine meets the national standard GB4208-93RP6; The phone has good stability, strong anti-interference ability, and meets the national standard GB/T15279-94;
Main technical indicators:
Suitable for various program-controlled switches and dispatch switch systems with a feed voltage of 48-60V;
Temperature: -30~60 ° C Relative humidity: 10%~95%
Atmospheric pressure: 86-106Kpa Environmental noise: ≤ 60dB (A)
Ringing sound level: ≥ 70dB (A)
Standard frequency: Low frequency group: 697, 770, 852, 941Hz
High frequency group: 1209, 1336, 1477Hz
Frequency offset: not greater than ± 1.5%
Signal level when the user line is 3KM:
Standard frequency: Low frequency group: -9dB ± 3dB
High frequency group: -7dB ± 3dB
High and low frequency level difference of combined signal: 2 ± 1dB
The total distortion caused by harmonic intermodulation is at least 20dB lower than the base wave level
Call transmission indicators: (5KM) SLR ≤ 12, RLR ≤ -1, STMR ≥ 10
Output impedance: 600 Ω
Equipped with a powerful 12 group number storage memory dialing function (each group of numbers can be up to 16 digits long)(Editor in charge: admin)