Visonic PMASTER20G2 Installer's Manual page 15

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OPTIONAL EXPANDER MODULE, ZONES, SIRENS, AUDIO BOX AND WIRED DETECTORS WIRING
A. Back Unit
B. Expander
C. Internal siren or strobe 6-12 VDC,
150 mA Max.
D. External siren MG441PDS or similar siren 12 VDC
(nominal) 350 mA Max.
E. Voice box
F. Connect wired detectors as illustrated.
Note:
The wired detector should be installed at least 2
meters away from the control panel.
Notes for EXPANDER module wiring:
*
Wired zone
terminals can be connected to a normally closed contact of a detector, switch (for example a Tamper
switch of any device), or a pushbutton, via a 2.2 K
36mA) to a detector (if necessary).
**
The EXT terminal can be used to trigger an external siren.
The INT terminal can be programmed for an "internal siren" or "strobe" (see par. 4.7).
The 12V and "GND" terminals can be connected to a siren (for constant DC power supply).
***
The.12V supply to the PGM device is fused. Current is limited to 100 mA.
WARNING! When plugging terminals back into place, be sure to align them carefully with the pins on the PCB.
Misaligned or reverse insertion of terminals may damage internal PowerMaster-33 G2 circuits!
IMPORTANT! The terminals for internal and external sirens are DC outputs intended for 12V sirens. Connecting a
loudspeaker to any of these outputs will cause a short circuit and will damage the unit.
D-304267
PowerMaster-33 G2 Installer's Guide
Regarding the two wired zones, the control panel
classifies the events according to the resistance it
measures as shown in the table below.
E.O.L or Arming Key Resistance
Range
0 kΩ  1.76 kΩ
1.76 kΩ  2.64 kΩ
2.64 kΩ  3.52 kΩ
3.52 kΩ  5.26 kΩ
G. Detector without tamper switch or arming key
H. Detector with tamper switch or arming key's tamper
PGM device
I.
J. Wired zone A or B
K. Ground (GND)
Figure 3.8b – Zone
and Siren Wiring
resistor. The 12V terminal can be used to supply 12V (up to
Zone
Tamper
Normal
Tamper
Alarm
Tamper
5.26 kΩ 
Arming Key
Tamper
Arm
Tamper
Disarm
Tamper
15

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