Industrial flame monitoring - U2-101xS All-In-One Viewing head

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The Honeywell U2-101xS series model all-in-one viewing head with integrated signal processor delivers flame discrimination in the toughest environments. With automatic setup and the ability to monitor UV and IR flame components simultaneously or separately, the U2-101xS all-in-one flame scanner offers improved burner up time and reliability.

Industrial process burners, multiple burner system.

Touch screen user interface

A tempered and fully sealed glass touch wheel sensor: no mechanical moving buttons.

•	Local display: LED display for flame signal monitoring onsite
•	Configuration menu is locked to avoid accidental access automatically after a few minutes of inactivity. To unlock, make 1 full 360 turn with the finger around the touch screen window.

Power supply

24 Vdc | 2.6 VA

Protection class

•	NEMA 4x, IP66
•	Zone 2 Class 1 Div 2 Group A, B, C and D
•	U2-101xS: II 3G Ex nA nC T5 Gc
•	U2-101xS-PF: II 2G Ex d IIC T6 Gb / 2D Ex d tb IIIC T85 Db

Ambient temperature

-40 ... 70 ^oC

Maximum humidity

85 %rh

Approvals

•	CE (EN298) for continuous operation (Europe).
•	CSA and FM (US)
•	IECEx and ATEX (explosion proof)
•	NCC/Inmetro (Brazil)
•	EAC (Russia)
•	KTL (Korea)
•	SIL 3 Capable

Housing (HxWxD)

117 mm | 117 mm | 155 mm

Weight

2.8 kg

Output signal

•	4-20 mA (or 0-20 mA) with scale multiplier for remote meter or DCS and local display.

Relay outputs

Wire flame and self-check relay contacts in serial to obtain fail-safe operation.

•	Flame relay: SPST - Normally Open
•	Self-check relay: SPST - Normally Open

End switch function/capacity

30 Vdc, 1 A (resistive)

Note

•	For "PF" models it is highly recommended to use a pipe coupler (see R-518-xx accessories), for easy mounting on to a viewing pipe.
•	Because Honeywell cable accessories are of USA origin, all cable lengths are measured in Ft (Feet, 1 Ft = 304.8mm)

Control model

Flame switch

Outputs

2xSPST

Flame failure response time

1/2/3s selectable

Additional description

•	Sensor: UV Tube (UVTron), UV photo diode (UVss), IR sensor or a combination of these three sensors
•	Response (peak): 210 nm (UVTron), 310 nm (UVss), 1400 nm (IR)
•	Technology: Flicker (UVss and IR), Pulse Count (UVTron)
•	100% immunity for X-Ray and Gamma radiation
•	Self-check (Electronic shutter): internal processor monitors tube health
•	All-in-one flame scanner: no additional wiring cabinet needed
•	Remote communication: Modbus RTU (2 wire RS485 compatible)
•	7 files for different configuration, that can be selected by applying or removing a voltage on the dedicated terminal (where FILE 0 is selected < 16Vdc and FILE X > 21Vdc) which this allows smooth file transition possible on mixed fuel burners. File 1..7 are selectable via the Modbus connection.