ARMTEL DWEx - Page 18

DWEX DIGITAL LOUD-SPEAKING EXPLOSION PROOF CALL STATION
User Manual
page 16/40 armtel.com
© Armtel info@armtel.com
Inside the DWEx enclosure (see Figure 4), an explosion-proof box DKV-3 manufactured
by "Armtel" LLC is fixed on the posts. In the upper part of the DKV-3 box there is an additional
amplifier (5), in the lower part of the box there is a block of main boards (4). The explosion-
proof DKV-3 box with the main boards block and the additional amplifier is connected to
the terminal box (3) and to the KIB board (6).
Figure 4 – DWEx enclosure with an explosion proof box
The electromechanical relay installed in the main boards block of DWEx unit inside
the explosion proof box DKV-3 («d»-type shell), is designed for switching with incoming calls
to external devices, such as a light signal device (not included in the scope of supply). The
operating mode of the relay coincides with the operating mode of the auxiliary amplifier and
is determined by its configuration parameters. The following modes of the relay operation
are available:
– the relay is not activated during a call;
– the relay is always activated when an incoming call comes in (default mode);
– the relay is activated when the first call comes in, and is turned off after the
subscriber answers. Re-enable after the lock interval of 15 seconds.
he main boards block and the KIB board are connected between each other and
the terminal box by electric cables, which ensure their interaction and functioning in
the communication system.
Auxiliary amplifier 25 W is installed in versions DWEx (see Table 1). The auxiliary
amplifier is installed inside the explosion proof box DKB-3 with a «d»-type shell (see
Figure 4), which is connected to the terminal box and the KIB board
The following operation modes are available for the auxiliary amplifier:
– OFF;
– ON, messages are playbacked concurrently with the main amplifier;
– The auxiliary amplifier is used for the voice call.