Microphone Sensitivity; Technical Data - Siemens WAC12 Instrucciones De Instalación

Fig. 4
E-Bus from the cen-
tral control unit
T+
T-
Fig. 5a
A- A+
e.g. WMA 11
Fig. 5b
AE- AE+ NC
T- T+
WAC 12 WAC/WAS 11
Fig. 5c
AE+
AE-
WAC 12
Fig. 5d
The right to make technical changes to the described equipment without prior notice is
E-Bus to other
accessories
B1- B2 B3 B4+
Audio to
other
WAC 12
A- A+
WAC 12
T T A- A+ T T A- A+
WAS 11
A- A+
A-
WAC 11 WAC 11
reserved.
3.4 Mounting (Fig. 4)
- The housing can be mounted flat or at 45
- Always use two attaching points which are one above the
other, including for corner mounting.
4. Wiring
4.1 E-Bus (Fig. 5a)
The use of type 24 AWG 7x0,2 mm dia. cable is recommended.
The E-Bus cable shall not be more than 500 m long. The WAC 12
must be connected to the central control unit via the E-Bus (B1-,
B2, B3, B4+). It can be routed parallel to other accessories.
4.2 Tamper (Fig. 5a)
The tamper inputs T- and T+ must be short-circuited if not wired
to a WAC 11 or WAS 11.
4.3 Audio (Fig. 5b)
To avoid side-tone, a twisted core pair at least 0.6 mm in dia.
must be used. The audio connection to the central control unit
must not be more than 200 m long. The audio output depends
on the cable length and core cross-section. The audio connection
(A- and A+) of the WAC 12 must be connected to the audio input
(A- and A+) of the central control unit (e.g. WMA 11).
4.3.1. WAC 11 and WAS 11 (Fig. 5c)
The audio outputs (A- and A+) of the WAC 11 and WAS 11 are
connected to the audio inputs (AE- and AE+) of the WAC 12. The
tamper outputs (T,T) of the WAC 11 and WAS 11 are connected
in series to the tamper inputs (T- and T+) of the WAC 12.
Where several WAC 11 are used, all WAC 11 must be connected
directly to the WAC 12 to obtain optimum per for mance (Fig. 5d).
5. Start-up

5.1 Microphone sensitivity

The sensitivity of the microphone must be matched to the room
and ambient noises (potentiometer U , Fig. 3).
Where sensitivity is reduced, the reception of quiet signals
naturally reduces. The following ranges are normally obtained.
- Approx. 3.5 m with potentiometer on min.
- Approx. 6.5 m with potentiometer on mid position.
- Approx. 8.5 m with potentiometer on max.
5.2 Speaker
Set the required volume using potentiometer (Y , Fig. 3).
5.3 LED „microphone active"
- Switch (E, Fig. 3) open: LED active.
- Switch (E, Fig. 3) closed: LED inactive.
6. Close housing
1 - Engage cover at the top in the openings in the base of the
housing.
2 - Close the cover by pushing downwards until the locking
tab engages.

7. Technical data

Supply
Power consumption, quiescent state
Power consumption, "challenge" state
Operating temperature
A+
Housing material
Dimension in mm
Safety class
Weight
o
.
Through E-Bus
6 mA
38 mA
-10 to +55 °C
ABS
H 145 x B 105 x T 70
IP 30
240g