KRM-X-1-MOD 0.6

Oppermann KRM-X-1-MOD 0.6
230 V AC Modbus, for fan control and ventilation monitoring

incl. sampling tube LKR-X 0.6 m

• VdS approval (G219046/G219053)
• Patented single-tube air measurement system
• Contamination display in % and alarm at 70 %
• Electronic airflow control
• Reset button externally accessible in the housing
• Remote reset option via terminals
• Long service life, alarm threshold tracking
• 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 N.C. contact, 8 A, 250 V AC or 24 V DC
Contamination relay: 1 N.C. contact, 6 A, 250 V AC or 24 V DC
Operating temperature: -20 °C - +50 °C
Permitted flow: 1 - 20 m/s
Permitted humidity: 10 - 95 % non-condensing
Protection class: IP 65
Approvals/Tests: VdS approval G219046, G219053, DIN EN 54-27
LED Display: Contamination level %, flashes > 70 %
LED in housing: green operation, blue missing airflow, yellow fault, electronics, smoke detector defective red smoke alarm, incl. contamination > 99 %, flashes when attempting to reset if the 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. If smoke is detected, the detector reacts immediately and triggers an alarm. Over time, the detector becomes contaminated. Due to the alarm threshold tracking, 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 degree of contamination is signaled on a two-line LED display; at > 70 %, it flashes and the "dirt" relay drops out. To prove functionality, the device is equipped with an electronic airflow monitoring system, which illuminates a blue LED when the flow is < 1 m/s. The fault LED lights up if the smoke detector or the electronics are defective, or if the smoke detector is missing. The smoke alarm must be reset with the reset button. The function test is also possible with the same button. Actuating it acts like a smoke alarm. The same function is also achieved upon restart or by opening the bridge between terminals 9 and 10 (remote reset).