Conventional Automatic Detectors
Installation | en
13
Bosch Sicherheitssysteme GmbH
Operation Guide
2019.11 | 5.0 | F.01U.003.962
Connection
Terminal
Wire
4-Wire
6-Wire
Voltage -
0V
black (bk)
Trouble relay
t
o
(not
connected)
not connected
[green (gn)]
t
1
(C)
connect to b1/b2
brown (bn)
t
2
(NC)
yellow (ye)
brown (bn)
Alarm relay
b1 | b2 (NO) yellow (ye)
a1/a2 (C)
white (wh)
Shielding
[blue (bu)]
Remote indicator output
c
* Terminals for looping through the power supply.
** The wire can be re‑feeded from the trouble relay by connecting it to terminal t
o
.
Notice!
With a four‑wire connection (refer to table), an alarm of any of the following detectors in a
stub will not be recognized in case of a fault.
With a six‑wire connection (refer to table), all following detectors of a stub will continue to
operate even in case of a fault.
+V
0V
a1/a2
b1/b2
wh
bu
FCA-500-E-EU
FCA-500-EU
FCA-500-EU
ye
bk
rd
bk
MPA
MPA
MPA
wh
bu
wh
ye
bu
rd
ye
bk
rd
Figure
3.7: Connection of the detector base with 4 wires
Position Description
MPA
Remote indicator (optional)