www.atestgaz.pl
1
General information
LTT2 / LTT4 Warning LED Tower with Sounder is a device dedicated to optical and acoustic signalling of the
presence of hazards in the particular industrial installation.
Device can be installed in Zone 2 (II3G 3D) of gas and dust hazardous areas.
The LLT2 / LTT4 stack light includes two or four light modules with mutually independent configuration and
control (see details in Section 10) furnished with extremely bright LEDs as well as one audial module (siren)
with remotely controlled intensity of produced sound. Owing to such a design the LLT2 / LTT4 unit is a multi-
purpose device since it is suitable for a large number of applications, e.g. to warn about specific events in
various systems for gas detection, to raise alarms under emergency conditions or other safety infringements
in industrial facilities.
Figure 1: Location and role of the LTT2 in Gas Safety System
1.1
Main features of the device
Two or four light segments, available in 5 different colours. Segment could be 2-coloured – see
Section 10.
Continuous / intermittent (blinking) signalling.
Flash light in red or yellow.
Sounder:
• one level of sound intensity (type PW-091-C-X / PW-089-C-X),
• two level's of sound intensity (PW-091-S-X, PW-091-M-X / PW-089-S-X, PW-089-M-X).
Signalling up to:
• two different alarm levels – LTT2,
• four different alarm levels – LTT4,
with communicating the proper operational state (no failures) by the green colour (in Gas
Detection& Safety Systems).
Connections and control by on/off signals or by RS-485 (Modbus), Sigma BUS.
s. 6|23
User Manual: POD-037-ENG R06
