Voice communication, signalling and start-up warning along conveyors on faces and roadways as well as the stopping and interlocking of the drive installations to prevent restartingbr>
- Modular system design:
Arrangement of the components between
main station and end unit in any order
- Lightweight, but sturdy components such as speaking stations, stop switch, pull-rope switch, emergency stop coupler, etc.
- Sturdy, reliable connection by 8-pole plug-in connector with captive interlocking mechanism
- Interfaces according to BB22444 or Profibus specification
- Integration of:
- ZM51 process data and automation stations
- DPM.. peripheral modules (Siemens)
- Modular system design, arrangement of the components between main station and end unit
in any order
- Lightweight, but sturdy components such as speaking stations, stop switches, pull-rope
switches, emergency stop couplers, etc.
- Rapid exchange of defective components,hence short stoppage times
- Simple and rapid assembly by plug-in connecting lines
- Rugged, watertight 8-pole plug-in connector with captive interlocking mechanism
- High volume and good intelligibility of the loudspeakers
- Microphones with dynamic compression
- Comprehensive diagnostic functions in the main station
- Parallel interface with the drive control system (only L12-H2)
- Serial interface
- according to BB22444 (L12-H2 and L12-H31)
- according to Profibus (only L12-H7)
- LF interfaces with the nearest WL line or the WL200 intercom central unit
- Alphanumeric display panel (LCD) with background illumination for display of system conditions, defects and numbers of actuated stop switches in clear text in the main station or as transmitted display(s)
- Sectional start-up warning
- Maximum system extension
- max. number of emergency stop couplers per system: 12
- max. number of i/i couplers per system: 1
- max. number of speaking stations, emergency stop couplers and stop switches per system: 125
- max. number of master line sections per system: 2
- For each master line section
- up to 45 speaking stations and
- up to 75 stop switches can be used
- Integration of ZM51 process data and automation stations in the L120 system line
- Connection of peripheral modules
DPM.. peripheral modules (Siemens) can be connected to the L120 system line (wires 4 and 5).
When the L12-H7 main station is used data transmission takes place according to Profibus DP specification with a transmission rate of 93.75 kbit/s.
The L120 loudspeaker system is used for voice communication, signalling and start-up warning along conveyors on faces and roadways as well as the stopping and interlocking of drive installations to prevent restarting.
- has a type test certificate BVS 89.5007X
according to EN 50014, EN50020 and
DIN VDE 0170/0171 Part 1 A102 in type of
protection Ex s I when sNG3-12ib power supply
units are used.
- a system conformity certificate BVS 92.C.1111X
according to EN 50014 and 50020 in type of
protection EEx ib I when NG3-12ib power supply
units are used.
The system components, which must remain in operation after disconnection of the power supply as a result of an increase in the methane content, conform to type of protection EEx ia I.
According to expert report 2.7.1 -80/89 RWTUV the L120 system fulfils the protective aims of the control guidelines of the mining authorities dated 10.12.1981 in the version dated 25.7.1991.
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