Ceiling smoke alarm DRM 3.3 – bus-enabled for STG 1.2
Fire Protection | Data sheet No. 40102 | Version 01-2011 |
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Technical Data
Power supply:
24 V DC nominal voltage
17 – 41 V DC from STG 1.2
via system ringbus
Power consumption:
Standby current:
460 µA (60 µA RMS+ 400 µA RM)
Alarm current:
< 10 mA
Short-circuit current :
< 10 mA
Rated continuous current:
1 A (RMS), 30 mA (RM)
LED displays:
Alarm:
2 red LEDs light up on RM 3.3
Short-circuit:
yellow LED lights up on the side
of the RMS 3.3
Alarm + fault signals:
via bus on STG 1.2
Rated
operating temperature:
-10 °C – +50 °C
Rated
storage temperature:
-30 °C – +60 °C
Rated humidity:
10 – 95 % RH (at 40 °C)
Housing:
ABS plastic
Dimensions:
Ø 100 x 52 mm
Weight:
approx. 0.1 kg
Installation:
wall/ceiling installation
Protection type:
IP 42
Colors:
white RAL 9010 (WHT)
Connections:
screw terminals max. 2.5 mm²
Certification:
EN 54-7
VdS-certification:
G208038
Labeling RM 3.3:
ALK-E 0832-CPD-0611 & CE
Labeling RMS 3.3:
YBO-R/SCI 0832-CPD-0963 & CE
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Operated with Oppermann control unit STG 1.2
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Up to 99 DRM 3.3 can be connected per STG 1.2
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The DRM 3.3 consists of smoke alarm RM 3.3
and smoke alarm socket RMS 3.3
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Power supply and communication via safety
ringbus – monitored for short-circuit and
broken cable
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LED display on alarm (red – RM 3.3) and
short-circuit (yellow – RMS 3.3)
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Easy and convenient installation
Product description / functionality
The DRM communicates with the STG control unit via the safety-
monitored system ringbus. The alarms forward fault and alarm
messages to the STG and indicated on a display. A technician or
building manager can therefore see all connected alarms at a
glance. The system ringbus monitors for short-circuits and broken
cables. An alarm or fault message is indicated on the STG in each
case. Messages must be manually reset on the STG after the fault
has been lifted (not self-canceling).
The optical alarm (scattered light effect) provides early warning
for incipient fires with smoke, in particular smoldering fires. The
sensor cavity houses a dual infrared light source with 360° detec-
tion. Normally, the pulsating light ray from the transmitter does
not reach the receiver. If smoke particles enter the sensor cavity,
a portion of the light is reflected to the receiver resulting in an
alarm trigger. Two red LEDs on the RM 3.3 smoke alarm and one
red LED on the STG 1.2 indicate an alarm.
The alarm status on the RM 3.3 smoke alarm expires automati-
cally after the alarm cavity is free (LEDs on RM go dark). The alarm
remains intact on the STG until it is manually reset at the control
unit. The STG can only be reset when the alarm LEDs in the smoke
alarm have gone dark.
Starting at a contamination level of 70 %, the STG 1.2 indicates
a message to prompt targeted maintenance. An alarm is issued
starting at 99% contamination.
Important note:
Please also note separate specification sheets
for STG 1.2.
