Service speech
183
Service
Service speech
4.1
Measuring points
TwinBus power supply unit 1 7573
TwinBus door intercom module 1 4760/
TwinBus built-in loudspeaker 1 4921
TwinBus indoor telephone and indoor video station
Clamp
Load
Target voltage
a1
b
open
30 V DC
a2
b
open
30 V DC
a3
b
open
30 V DC
a1
b
switched
24 to 28 V DC
a2
b
switched
24 to 28 V DC
a3
b
switched
24 to 28 V DC
1
b
no door communication
0 V DC
1
b
with door communication
24 V DC
2
b
no door communication
30 V DC
2
b
with door communication
0 V DC
3
4
without load
11 V AC
Clamp
Target voltage
2
1
no door communication
15 V DC or 30 V DC
1
2
with door communication
24 V DC
3
4
11 V AC
Clamp
Target voltage
a
b
20 V DC to 28 V DC
ED
ED
20 V DC to 28 V DC
~
~
AC 16 V or DC 18 V
V
a
V
b
< 1 V
4
Summary of Contents for TWINBUS
Page 2: ...2 ...
Page 41: ...Installation Assembly connection and start up 41 Installation 00042 0 ...
Page 156: ...Installation Installation Assembly connection and start up 156 ...
Page 193: ...Notes 193 ...
Page 194: ...Notes 194 ...
Page 195: ...Notes 195 ...
Page 196: ...Notes 196 ...