Long-range sensor main unit 2-wire explosion-proof model FR-LEX20

FR-LEX20 - Long-range sensor main unit 2-wire explosion-proof model

*Please note that accessories depicted in the image are for illustrative purposes only and may not be included with the product.

Specifications

Model		FR-LEX20
Type		2-wire explosion-proof model
Measuring range		Up to 20 m ^*1
Display range		Up to 25 m ^*1
Measurable dielectric constant of medium		2 or more ^*2
Resolution		1 mm
Precision		Up to 0.1 m: ±10 mm; 0.1 to 10 m: ±1 mm; 10 to 20 m: ±2 mm ^*3
Response time		1 s, 4 s (default value), 10 s, 25 s
Tank pressure		-0.1 to +1 MPa (-0.1 to +0.1 MPa below -20°C)
Material	Tank interior	Lens: PTFE; Internal seal: FFKM; Fastener: SUS304
	Housing	PPS PC PA Internal potting agent: Epoxy resin (when using an Isolated barrier) Barrier: PC (when using a Zener barrier) Barrier: PC (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure: Aluminium die casting, NBR Cable glands: Nickel-plated brass, chloroprene
Connection diameter		G1-1/2 (40A)
Output	No. of control outputs	─
	Control output/auxiliary output
	Analogue output	4 to 20 mA (Response time: 3.0 s after internal value is confirmed [90% response])
Analogue output Precision	Resolution	1 mm ^*4
	Zero accuracy	±0.1 mA (zero point = 4 mA) ^*4
Analogue output accuracy	F.S. accuracy	±0.2 mA (full scale = 20 mA) ^*4
Power supply	Power voltage	18.3 to 35 VDC. (when using an Isolated barrier) 24 VDC +25%/-10% (when using a Zener barrier) 20.1 to 28 VDC (when using a Zener barrier with a flameproof enclosure) 20.1 to 28 VDC
	Current consumption	752.5 mW or less (including analogue output; excluding load current) (when using an Isolated barrier) 3 W or less (when using a Zener barrier) 602 mW or less (when using a Zener barrier with a flameproof enclosure) 602 mW or less
Environmental resistance	Ambient temperature	-30 to +60°C (no freezing) (when using an Isolated barrier) Barrier: -30 to +60°C (no freezing) (when using a Zener barrier) Barrier: -30 to +60°C (no freezing) (when using a Zener barrier with a flameproof enclosure) Barrier: -30 to +60°C (no freezing)
	Relative humidity	Up to 85% RH (no condensation)
	Temperature of coupling used	-30 to +85°C (no freezing)
	Vibration resistance	10 to 500 Hz; Power spectral density: 0.816 G² X, Y and Z directions
	Shock resistance	100 m/s² (10 G), 16 ms pulses, 1000 times each in X, Y and Z directions
IECEx	Explosion-proof performance	Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da (when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC (when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC (when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db
	Zone	Zone 0/20 (when using an Isolated barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier with a flameproof enclosure) Zone 1/21
	Electrical ratings	U_i: 35 VDC / I_i: 142.4 mA / P_i: 1000 mW / L_i: 26.2 nH / C_i: 79 nF (when using an Isolated barrier) U_m: 250 VRMS / U_o: 26.78 VDC / I_o: 115.307 mA / P_o: 772 mW / L_o (IIC): 0.2 mH / C_o (IIC): 0.092 μF / L_o (IIB): 0.2 mH / C_o (IIB): 0.72 μF (when using a Zener barrier) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF (when using a Zener barrier with a flameproof enclosure) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF
	Temperature	-30°C ≤ Ta ≤ 60°C / -30°C ≤ Tp ≤ 85°C (when using an Isolated barrier) ─ (when using a Zener barrier) ─ (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure: -30°C ≤ Ta ≤ 60°C
ATEX and UKEX	Explosion-proof performance	II 1 G Ex ia IIC T4 Ga or II 1 G Ex ia IIB T4 Ga II 1 D Ex ia IIIC T135°C Da (when using an Isolated barrier) II (1) G [Ex ia Ga] IIC or II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC (when using a Zener barrier) II (1) G [Ex ia Ga] IIB II (1) D [Ex ia Da] IIIC (when using a Zener barrier with a flameproof enclosure) II 2 (1) G Ex db [ia Ga] IIB T4 Gb II 2 (1) D Ex tb [ia Da] IIIC T135°C Db
	Zone	Zone 0/20 (when using an Isolated barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier with a flameproof enclosure) Zone 1/21
	Electrical ratings	U_i: 35 VDC / I_i: 142.4 mA / P_i: 1000 mW / L_i: 26.2 nH / C_i: 79 nF (when using an Isolated barrier) U_m: 250 VRMS / U_o: 26.78 VDC / I_o: 115.307 mA / P_o: 772 mW / L_o (IIC): 0.2 mH / C_o (IIC): 0.092 μF / L_o (IIB): 0.2 mH / C_o (IIB): 0.72 μF (when using a Zener barrier) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF (when using a Zener barrier with a flameproof enclosure) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF
	Temperature	-30°C ≤ Ta ≤ 60°C / -30°C ≤ Tp ≤ 85°C (when using an Isolated barrier) ─ (when using a Zener barrier) ─ (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure: -30°C ≤ Ta ≤ 60°C
Type Approval of Electrical Equipment for Use in Explosive Atmospheres	Explosion-proof performance	Ex ia IIC T4 Ga or Ex ia IIB T4 Ga Ex ia IIIC T135°C Da (when using an Isolated barrier) [Ex ia Ga] IIC or [Ex ia Ga] IIB [Ex ia Da] IIIC (when using a Zener barrier) [Ex ia Ga] IIB [Ex ia Da] IIIC (when using a Zener barrier with a flameproof enclosure) Ex db [ia Ga] IIB T4 Gb Ex tb [ia Da] IIIC T135°C Db
	Zone	Zone 0/20 (when using an Isolated barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier with a flameproof enclosure) Zone 1/21
	Electrical ratings	U_i: 35 VDC / I_i: 142.4 mA / P_i: 1000 mW / L_i: 26.2 nH / C_i: 79 nF (when using an Isolated barrier) U_m: 250 VRMS / U_o: 26.78 VDC / I_o: 115.307 mA / P_o: 772 mW / L_o (IIC): 0.2 mH / C_o (IIC): 0.092 μF / L_o (IIB): 0.2 mH / C_o (IIB): 0.72 μF (when using a Zener barrier) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF (when using a Zener barrier with a flameproof enclosure) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF
	Temperature	-30°C ≤ Ta ≤ 60°C / -30°C ≤ Tp ≤ 85°C (when using an Isolated barrier) ─ (when using a Zener barrier) ─ (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure: -30°C ≤ Ta ≤ 60°C
NRTL/ACO	Explosion-proof performance	Class I, Zone 0, AEx ia IIC T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups A, B, C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1 or Class I, Zone 0, AEx ia IIB T4 Ga/Zone 20, AEx ia IIIC T135°C Da/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1 (when using an Isolated barrier) [AEx ia Ga] IIC or [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups A, B, C, D or Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1 (when using a Zener barrier) [AEx ia Ga] IIB/[AEx ia Da] IIIC Intrinsically safe circuit for Class I, Division 1, Groups C, D/Class II, Division 1, Groups E, F, G/Class III, Division 1 (when using a Zener barrier with a flameproof enclosure) Class I, Zone 1, AEx db [ia Ga] IIB T4 Gb/Zone 21, AEx tb [ia Da] IIIC T135°C Db/Class I, Division 1, Groups C, D, T4/Class II, Division 1, Groups E, F, G, T135°C/Class III, Division 1
	Zone/Division	Zone 0/20 Division 1 (when using an Isolated barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier) Do not install in a hazardous location (associated apparatus^5) (when using a Zener barrier with a flameproof enclosure) Zone 1/21 Division 1
	Electrical ratings	U_i: 35 VDC / I_i: 142.4 mA / P_i: 1000 mW / L_i: 26.2 nH / C_i: 79 nF (when using an Isolated barrier) U_m: 250 VRMS / U_o: 26.78 VDC / I_o: 115.307 mA / P_o: 772 mW / L_o (IIC): 0.2 mH / C_o (IIC): 0.092 μF / L_o (IIB): 0.2 mH / C_o (IIB): 0.72 μF (when using a Zener barrier) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF (when using a Zener barrier with a flameproof enclosure) U_m: 250 VRMS / U_o: 34.33 VDC / I_o: 112.007 mA / P_o: 961.3 mW / L_o: 1.0 mH / Co: 0.37 μF
	Temperature	-30°C ≤ Ta ≤ 60°C / -30°C ≤ Tp ≤ 85°C (when using an Isolated barrier) ─ (when using a Zener barrier) ─ (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure: -30°C ≤ Ta ≤ 60°C
Enclosure rating		IP67 (IEC60529), Enclosure Type 4X (NEMA250) (when using an Isolated barrier) Barrier: Not specified (when using a Zener barrier) Barrier: Not specified (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure : IP67 (IEC60529) Enclosure Type 4X (NEMA250)
Protection circuit		Reverse power connection protection, power supply surge protection
Weight		Approx. 920 g (when using an Isolated barrier) Barrier: Approx. 320 g (when using a Zener barrier) Barrier: Approx. 100 g (when using a Zener barrier with a flameproof enclosure) Flameproof enclosure + barrier (without cable glands): Approx. 1300 g
^1 Guaranteed value in water with the recommended installation. In still water, measurement is possible with water up to the edge of the lens. An undetectable area is present at short range owing to the environment and measurement medium. The maximum measuring range is also reduced. ^2 Measurement may not be possible depending on the environment and shape of the target. ^3 Guaranteed value from verification performed at KEYENCE inspection facilities. Measurement errors may occur depending on the customer’s environment. ^4 Guaranteed value from verification performed at KEYENCE inspection facilities with a load resistance of 250 Ω. Measurement errors may occur depending on the customer’s environment. ^*5 Associated apparatus are devices that comprise both intrinsically safe and non-intrinsically safe circuits. The FR-LEX20 meets the requirements for intrinsically safe construction when used in conjunction with associated apparatus.

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