Siemens WAC 12 User manual

8AA9992 - D1 - 10/11/2000 - UK -
Fig. 1
Fig. 2b
Fig. 3
Fig. 2a
3.2 Product overview (Fig. 2)
- Knockouts Q, Tfor cable inlet.
- Knockouts W, Efor attachment of housing.
- Knockout Rback tamper contact.
- Speaker Y.
- WMC 12 circuit board U.
3.3 WMC 12 circuit board (Fig. 3)
- E-Bus connection }.
- Audio connection {to central control unit.
- Audio connection Ito WAC 11 or WAS 11.
- Tamper input Ofor WAC 11 or WAS 11.
- LED Q, flashes when E-Bus is o.k.
- LED R, flashes to outside during monitoring (microphone
active).
- Address button W.
- Switch Efor "microphone active" LED.
- Tamper switch P.
- Microphone Y.
- Potentiometer Tfor speaker volume.
- Potentiometer Ufor microphone sensitivity.
1. Product description
The WAC 12 is used to verify audio alarms. It is fitted with a
speaker and microphone. It can be controlled through the E-
Bus, with the audio signal connected to the central control unit
via an audio module (e.g. WMA 11). The WAC 12 also serves as
a master for the unaddressable WAC 11 and WAS 11.
2. Supply package
The WAC 12 UK package contains the following
- One WAC 12
- One WLC 12 UK language kit complete with:
- Installation instructions.
3. Mounting instructions
The WAC 12 is designed for mounting in dry indoor rooms.
To ensure good acoustics, note the following points.
- Mount 2 to 2.5 m above floor level.
- Maintain adequate distance from noise sources (ventilation
openings, fans etc.).
- Direct towards the centre of the space to be monitored.
- Do not mount on vibrating surfaces.
- The maximum length of the audio connection between the
WAC 12 and central control unit is 200 m.
3.1 Opening the housing (Fig.1)
1 - Using screwdriver Q, press locking tab to release.
2 - Lift off cover W.
s
Installation Instructions
WAC 12
WLC 12 UK 20 800 042.0-010

Fig. 4
Fig. 5a
E-Bus from the cen-
tral control unit
E-Bus to other
accessories
Fig. 5b
WAC 12 WAC/WAS 11
Audio to
other
WAC 12
Fig. 5c
e.g. WMA 11 WAC 12
WAS 11
Fig. 5d
WAC 12 WAC 11 WAC 11
The right to make technical changes to the described equipment without prior notice is
reserved.
3.4 Mounting (Fig. 4)
- The housing can be mounted flat or at 45o.
- 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 performance (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 Through E-Bus
Power consumption, quiescent state 5 mA
Power consumption, "challenge" state 24 mA
Operating temperature -10°C to +55°C
Housing material ABS
Dimension in mm H 145 x B 105 x T 70
Safety class IP 30
Weight 230g
T+
T- B2 B3 B4+
B1-
A+
A-
A+
A-
T+
T-
AE+
AE- TTA-A+
NC TTA-A+
A+ A+
A- A-
AE+
AE-