Bosch Plena - Page 34

Bosch Security Systems | 2006-06 | 9922 141 10377 en
Plena Voice Alarm System | Installation and User Instructions | Equipment en | 34
See figure 5.11, situation I for an example of a fail-safe
4-wire volume override:
• Connect the NO contact of the Volume Override to
the 24V contact of the Volume Override.
See figure 5.11, situation II for an example of a
power-saving 4-wire volume override:
• Connect the NC contact of the Volume Override to
the 24V contact of the Volume Override.
figure 5.11: 4-wire volume override
COM
NC
NO
NC
TRG2
Override/Trigger Output
G1
24V
EM
Fault
Call
Z1
Z2
Z3
Z4
Z5
Z6
NC
COM
NO
NC
COM
NO
NC
COM
NO
NO
24V
Volume Override
100V
0V
Z+
Z-
NO
NC
COM
NC
NO
NC
TRG2
Override/Trigger Output
G1
24V
EM
Fault
Call
Z1
Z2
Z3
Z4
Z5
Z6
NC
COM
NO
NC
COM
NO
NC
COM
NO
NO
24V
Volume Override
100V
0V
Z+
Z-
NC
NO