Fire Protection | Data sheet No. 40102 | Version 01-2011 |
3
|
4
Ceiling smoke alarm DRM 3.3
Electrical connection on STG 1.2 control unit
All work on electrical installations or equipment must only be performed in accordance with electrical engineering principles by a
trained electrician or by an instructed person under the direction and supervision of a trained electrician.
Contamination
Service
Malfunction
Alarm
GLT bus
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
B
A
B
GND 485
GND smoke alarm
Smoke alarm bus
Modbus
RTU to
the BMS
Shield
Power supply for STG
Manual call point DKM 3.3
Ceiling smoke detector
DRM 3.3
Loop
+
IN
Loop
+
GND
in
in
in
in
out
out
out
out
GND
Loop
+
Loop
–
Loop
–
Loop
–
IN
Loop
+
OUT
Loop
–
OUT
Scr
een IN
Scr
een OUT
24 V AC/DC
24 V AC/DC
Shield
1
2
5
7
6
1
2
5
7
6
Contacts are shown disconnected from power (alarm)
Alarms are supplied with power from the system ringbus. The bus cable must be shielded on both sides (terminal 7).
The maximum bus length is 250 m (loop length 500 m).
Smoke alarm address
Each connected alarm must be assigned a dedicated, unique BUS address between 1 and 99. This is accomplished with the PG 3.3
programming tool (accessory) The standard default address is 127 and is therefore not recognized by the STG. On request, Opper-
mann can configure the alarms with custom BUS addresses (indicate in your order - particularly important when ordering replace-
ment parts). A fault alarm is triggered if the same alarm address is assigned twice on the ringbus. If the alarm message is changed,
the alarm must be reregistered with the STG in service mode. The positioning of addressed DKMs in the ringbus is arbitrary.
