Fire protection
KRM Duct Smoke Detector
Oppermann KRM® Duct Smoke Detectors
for monitoring ventilation systems
• VdS approval (G 210059 / G 210148)
• M
anufacturer-neutral DIBt certification No. Z-78.6-200
for fire and smoke protection flaps
• Patented TurboTube sensor tube
• Housing design-protected
• EasyInstall and EasyFunction – quick and
easy installation, intuitive ergonomic operation,
modern design
• D
igital contamination indicator
in percent
• DigiSense – automatic alarm threshold tracking
up to 70 % contamination level
• Integrated digital flow monitor with LED display
• Optional Modbus / BACnet interface to the DDC
• Broad range of accessories, e.g. Flap module KM 1.2
• Fast wiring with spring clips
• Standard length 0.16 m – for all ducts installable without shortening
Fire protection
the market. Innovative, reliable technology combined with years of experience on the market. Innovative, reliable technology combined wi
and modern design. Based on well proven basic methods with new, innovative principles and modern design. Based on well proven basic m
comfort through modern technolog. Optimum comfort through modern technology. Optimum comfort through modern technology. Optim
TurboTube – „one size fits all“
A completely redesigned and patented sensor tube based
on a sampling profile with two closed, interior ducts and
two scoop-shaped, open exterior ducts facilitate extremely
uniform measurement gas sampling across the entire tube
length even at very low flow speeds.
The standard length of 0.16 m supports monitoring of all
duct cross-sections from 0 100 mm. The TurboTube sensor
Supply air
tube can be quickly installed independently of the KRM
housing. This allows shorter installation times and more
cost-effective operations for the tradesman. The TurboTube
makes the installation orientation and housing alignment
of the KRM extremely flexible.
VdS approved
Air flow
EasyInstall and EasyFunction
Smoke alarm
The robust housing of the KRM includes a smoke detector
Smoke alarm
and flow monitor, electronics, terminals and user interface.
Clearly structured graphics, a two-digit contamination
display, as well as the colored LEDs provide an intuitive
KRM-1 (230 V)
KRM-1-MOD (230 V)
KRM-1-BAC (230 V)
KRM-2 (24 V)
KRM-2-MOD (24 V)
KRM-2-BAC (24 V)
and ergonomic operation. Every detail has been optimized
based on many years of experience. The terminals are easily
accessible and arranged directly behind the opening for the
cable connection.
KRM Test
Flap module
KM 1.2
Patented TurboTube measurement system
Perfectly conceived details and function
Digital contamination indicator in %
The integrated alarm threshold tracking in the KRM ensures
consistent sensitivity up to an alarm threshold of 70 % contamination. The large display allows the contamination level
to be checked at a glance. The continuous airflow monitor
Monitoring device
AZE 1.2
uses a blue LED for signaling. The electronic is monitored
continuously and make smoke detector malfunctions visible,
amongst other occurrences. Functions are checked and
Exhaust air
malfunctions are reset with a button on the housing. An
DIBt certification
VdS approved
additional input contact is used to trigger tests via remote
RS485 bus interface
Air flow
KRM-1-DZ (230 V)
KRM-1-DZ-MOD (230 V)
KRM-1-DZ-BAC (230 V)
KRM-2-DZ (24 V)
KRM-2-DZ-MOD (24 V)
KRM-2-DZ-BAC (24 V)
The bus-compatible KRM has an RS485 interface as a
Smoke alarm
particularly innovative feature. This allows all functions and
Smoke alarm
signals to be directly transmitted to an automation station or
a gateway. The unique BACnet or Modbus interface and the
straightforward installation on building automation networks makes the KRM particularly suited for large buildings
and premises. Oppermann supplies appropriate accessories
for direct analysis of KRM signals. The newly developed
KRM Test
Flap module
KM 1.2
AZE 1.2 can monitor up to 99 KRMs and transmit signals to
the central building management systems via the RS485
Flap module KM1.2
Monitoring of BSK / RSK and test initiation
The module can detect the two limit positions of the
BSK / RSK (2 changeover contact inputs) and send these
to the DDC via the BUS protocol (BACnet or Modbus).
For service purposes, the module can be connected to
terminal 9 + 10 of the KRM. It can then trigger a test that
is sent by the fieldbus from the DDC to the module.
Monitoring device AZE1.2
All functions directly in view in a single location
The AZE 1.2 allows up to 99 KRM-2-MOD / KRM-2-DZMOD data points to be conveniently read at a glance from
a central location. This is ideal for the system operator,
particularly when no DDC-based visualization is available.
As a result, all data can be cost-effectively and efficiently
read from all connected detectors in a single location
to perform targeted maintenance or other operations. If
contamination, a malfunction, or an alarm is detected, this
is also centrally displayed on the AZE 1.2. Even the flow
and temperature on all connected duct smoke detectors
can be displayed.
The AZE 1.2 can route collective messages for alarm,
contamination, malfunction, and service to the DDC via
potential-free changeover contacts. The RS485 Modbus
RTU interface is a particularly innovative feature. It is used
to centrally report all KRM data to the DDC, where the data
can also be visualized.
Power supply Type NT
Water resistant housing (WDG)
for KRM
for mounting outdoors or in cold
areas, protects evaluation electronics
from condensation.
Bracket for KRM
for mounting the KRM smoke
detectoron round or insulated ducts.
Includes rubber grommets to seal off
sampling tube of air duct.
4 = Rubber
The power supply units (24 V DC or 24 V AC) are reliable
sources of power for KRM duct smoke detectors with DIBt
certification (types KRM-2-DZ, KRM-2-DZ-MOD and KRM2-DZ-BAC) with 24 V AC or DC when the KRM also powers
the FSD / SSD.
Large console for KRM with WDG
larger console for mounting the KRM
duct smoke detector, together with WDG
type splash-proof housing on round or
insulated ducts. Includes rubber grommet for sealing the sampling tube leading
to the air duct.
Rated current:
max. 140 mA (24 V); 30 mA (230 V)
Relay outputs:
Alarm relay locked:
1 changeover contact 250 V, 8 A
1 opening contact 250 V, 8 A
Contamination relay:
1 opening contact 250 V, 6 A
System failure relay:
1 opening contact 250 V, 6 A (DZ only)
Air flow relay:
1 opening contact 250 V, 6 A (DZ only)
Operating temperature: -20 °C – +50 °C
Rated rel. humidity:
10 – 95 % RH non-condensing
Rated flow velocity:
1 – 20 m / s
Protection type:
IP 54, with WDG IP 65
VdS approval: G210059 / G210148
DIBt certification:Z-78.6-200
230 V AC
24 V AC/DC
Dimensions in mm
1 Adapter plate with gasket
2 Patented measuring tube
3 End cap
4 Rubber bushing
(only for insulated or circular ducts)
5 Lower housing with seal
7 Optical smoke sensor
8 Upper housing with seal
9 LED red:
alarm / reset button
10 LED yellow: failure
11 LED display: % of sensor contamination
12 LED green: in operation
13 LED blue: air flow under 1 m / s
14 Opening for test gas
15 Air duct
Mounting position
DZ = DIBt approved
Scattered light
L = min. 160
Detector type:
Technical Data
Technical Data AZE 1.2
Technical Data KM 1.2
Power supply:
24 V AC / DC
Power supply:
24 V AC / DC
Power consumption:
250 mA (without KRM)
Power consumption:
32 mA
Display:Plain text display status /
KRM query, configuration
Operating displays/LEDs:
Power: Failure:yellow
Bus: green
KRM (Test): red
NC2, NO2, NC1, NO1: green
Relay outputs: Relay outputs:
For KRM test
1 changeover contact
1 opening contact
malfunction, service mode:
1 changeover contact each
Rated ambient temperature: 0 °C – 50 °C
Rated rel. humidity:
0 – 90 % RH non-condensing
Protection type:
IP 20
Cable connection:
Spring clips 0.5 – 2.5 mm²
1 closing contact 24 V, 1A
Rated ambient temperature: -20 °C – 50 °C
Rated rel. humidity:
0 – 90 % RH non-condensing
Protection type:
IP 54
Cable connection: Spring clips 0.5 – 2.5 mm²
Fire protection – automated smoke extraction
Automatic smoke outlet systems
Smoke extraction
flap with qualification approval
Supply flow flap
Smoke extraction
flap with qualification approval
Smoke extraction
flap with qualification approval
Ceiling smoke detectors
DRM 3.3
Safety network
This sketch shows you the interaction of detectors and
actuators in order to efficiently avoid the spreading of fire
and smoke by means of a RLT system which is installed in
the building.
In case a smoke detector which has been installed in
the fire section sets off an alarm, the designated smoke
extracting flap of the automation station triggered by the
STG 1.2 control unit will open and the smoke extracting
ventilator will be turned on. Other smoke extraction flaps
are closed in order to concentrate the extract air volume
on one smoke zone.
Control unit STG 1.2
For Ceiling smoke detector DRM / Manual call point DKM – bus-capable.
Manual call point
DKM 3.3
Control unit STG 1.2
Automation station
according to EN 61508
Note: Changes made without notice. The local rules and
regulations apply in each case. Non-binding operational
example without claim to completeness.
• Can connect up to 99 DRM 3.3 ceiling smoke
detectors / DKM 3.3 manual call points
• Possible to query each detector as to status
and contamination
• Large LCD display and 4 additional LEDs
• RS485 Modbus interface for informal transmissions
to the building management system (BMS)
• 4 changeover contacts for alarm, failure,
service and contamination
Data sheets and the price list can be found on our homepage.
Oppermann Regelgeräte GmbH
Im Spitzhau 1, 70771 Leinfelden-Echterdingen, Germany
Phone +49 711 727235-60, Fax +49 711 7280527
[email protected]
© Oppermann Regelgeräte GmbH
All rights and changes reserved.
We cannot accept any liability for printing errors and changes after printing.
Photo technology related color variations are possible. All measurements are approximate.
The current local rules and regulations must be observed.
Print 01/2017
• 1 opening contact for alarm
• Monitoring for short circuits and cable breaks
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