KRM-X-2-BAC 0.16

Oppermann KRM-X-2-BAC 0.16
24 V AC/DC BACnet, for controlling fans and monitoring ventilation

incl. sampling tube LKR-X 0.16 m

• VdS approval (G219046/G219053)
• Patented single-tube air measurement system
• Dirt indication in % and alarm at 70%
• Electronic airflow control
• Reset button in the housing, operable from the outside
• Remote reset option via terminals
• Long service life, alarm threshold adjustment
• Bus interface RS485 (only -MOD/ -BAC)

Technical Data

Detector type: Scattered light RM 3.3-X (ALN-E)
Power supply KRM-X-1/KRM-X-1-MOD/KRM-X-1-BAC:
230 V AC ± 10 %, 50/60 Hz
Power supply KRM-X-2/KRM-X-2-MOD/KRM-X-2-BAC:
24 V AC (16 – 27.6 V AC) or 24 V DC (21.6 – 27.6 V DC)
Rated current: KRM-X-1 /KRM-X-1-MOD/KRM-X-1-BAC: 30 mA
KRM-X-2/KRM-X-2-MOD/KRM-X-2-BAC: 120 mA
Relay outputs: potential-free
Alarm relay latched: 1 changeover contact, 8 A, 250 V AC or 24 V DC
1 NC contact, 8 A, 250 V AC or 24 V DC
Dirt relay: 1 NC contact, 6 A, 250 V AC or 24 V DC
Operating temperature: -20 °C - +50 °C
Permissible flow: 1 - 20 m/s
Permissible humidity: 10 - 95 % non-condensing
Protection class: IP 65
Approvals/Tests: VdS approval G219046, G219053, DIN EN 54-27
LED Display: Dirt level %, flashes > 70 %
LED in housing: green operation, blue no airflow, yellow fault, electronics, smoke detector defective, red smoke alarm, incl. dirt > 99 %, flashes when attempting to unlock if detector chamber is not yet empty
Housing: ABS
Dimensions: approx. 271 x 172 x 85 mm (L x W x H)
Cable gland: 3 x M16

Function

The KRM-X duct smoke detector was developed for smoke detection in ventilation ducts. It represents the combination of a smoke detector with an adapter system, whose sampling tube and housing have been specially adapted for optimal airflow through the smoke detector. The multi-chamber sampling tube in the air duct transports the air within the air duct along the entire length of the tube via the detector chamber back into the air duct. Upon smoke detection, the detector reacts immediately and triggers an alarm. Over time, the detector gets dirty. Due to the alarm threshold adjustment, the sensitivity remains the same until total contamination. From 70% contamination, the detector triggers and signals this by flashing. If the detector is not replaced, a smoke alarm will be triggered from 99% contamination. The dirt level is signaled on a two-line LED display, which flashes at > 70% and the "dirt" relay drops out. To verify functionality, the device is equipped with an electronic airflow monitoring system, which illuminates a blue LED at < 1 m/s. The fault LED illuminates if the smoke detector or electronics are defective, or if the smoke detector is missing. The smoke alarm must be unlocked with the reset button. A functional test is also possible with the same button. Actuating it has the same effect as a smoke alarm. The same function is also achieved by restarting or by opening the bridge between terminals 9 and 10 (remote unlocking).