KPM KB2 Fiber-Optic Sheet Break Detector

Non-contact optical measurement
With hundreds of installations worldwide, the KPM KB2 FiberOptic Sheet Break Detector is recognized as the best sheet break detector on the market. The non-contact sensor is placed above or under the web to be monitored. KPM KB2 is suitable for dirt, steam and high-temperature installations or where space is limited. The air-purged sensor head stays clean while monitoring for sheet breaks in the harshest environments.
Easy to set up
KPM KB2’s large display and logical user interface allows easy setup of the break detection by selecting the measurements that give the highest signal difference. Break and maintenance alarms are wired to the PLC or DCS.
Fast break detection
The KPM KB2’s digital signal processing technology measures all signals at a thousand times per second. KPM KB2 is immune to ambient light changes by measuring the backlight intensity. The break detection delay is a minimum of 15 ms. With digital filtration, users can select how many measurement cycles are used for break alarm.
RGB and infrared light measurement
KPM KB2 has RGB or infrared light sources to perform superiorly on all paper and board grades and applications, regardless of color. The RGB color measurement can handle all sheet, wire and felt colors providing reliable break detection. In addition to open-draw applications, the breaks can be detected against felt, wire, or even against a cylinder.
Electronics located outside harsh environment
KPM KB2 is very reliable even in a 100 percent humidity environment. While the sensor head is exposed to high temperatures, the electronics unit is mounted outside the machine hood to convenient location using fiber optic cable.
Specifications
Ambient temperature
Sensor head and fiber optic cable: -10 to 180 ºC (15 ºF to 356 ºF)
Electronics unit: -10 to 60 ºC (15 ºF to 140 ºF)
Fiber optic cable
KB2/6: 6 m (20’), KB2/9: 9 m (30’) or KB2/12: 12m (40’)
Fiber optic cable conduit
Requires flexible airtight conduit 19 mm (3/4”) ID min, available as an option.
Conduit connection
19 mm (3/4 ”) BSP
Installation
Sensor distance from the web 5...30 cm (2...12”).
Led pulse frequency
1 kHz
Power supply
90 - 264 VAC, 50/60 Hz or 24 VDC
Power consumption
15 W
Enclosure class
IP 66 (Nema 4X)
Purge air connection
Dry instrument air, 6/4 mm (1/4”) connector, normal consumption 80l/min
Digital outputs
2 x Closing or opening contact max. 250 VAC, 2A; 220VDC, 2 A for Break signal and Maintenance alarm
Alarm output delay
Min. 15 ms from the actual break
Analog outputs
Optional 3 pcs 4 - 20 mA max 600 ohm, Isolated
Dimensions (L x H x D) and weight
Electronics Unit 323 x 237 x 70 mm (12,7 x 9,3 x 2,8”), 3 kg (6,6lbs)
Sensor head Ø 33 mm (11/4 ”) SS316, pipe 1500 mm (59”) long, 4 kg (9lbs)