Discontinued
Intrinsic Safety Explosion-proof Barrier Zener-barrier(for Transducer)
Zener-barrier series MTL761ac / MTL764ac
- Explosion-proof rate:: ia2G3
Applicable Sensor | VPRF, VPRQ(F), VPRNP |
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Measured medium | Media that will not corrode SUS630 and 15-5PH (precipitation-hardened stainless steel), SUS316L (Refer to the individual specifications.) |
Measured Range | VVPRNP: 100 to 1700kPa or 100 to 1700kPa abs / VPRQ, VPRF: 1 to 50MPa / VPRQF: 1 to 100MPa (Refer to the individual specifications.) |
Specifications
Explosion-proof Rating | ia2G3 | |
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Installation | Class A (1) grounding | |
Operation Voltage | ±2.5V or 5V | |
Ambient Temperature | Applicable Sensor | VPRF, VPRQ, VPRQF: -20–60°C VPRNP: -20–50°C |
Zener-barrier | −20–60°C | |
Rating of Intrinsically Safe Circuit | Maximum voltage 24V / Maximum current 224mA / Maximum power 0.522W | |
Allowable Inductance for External Lines | 1mH or less | |
Allowable Capacitance for External Lines | 0.1µF or less | |
Measured medium | Media that will not corrode SUS630 and 15-5PH (precipitation-hardened stainless steel), SUS316L (Refer to the individual specifications.) |
Individual specifications
System model (Certification) | SA-010-00 | SA-010-00 | ||
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TIIS Certification Number | No. T68568 | No. T68670 | ||
Zener-barrier form | MTL761ac / MTL764ac | MTL761ac / MTL764ac | ||
Applicable sensor series | VPRF | VPRQ | VPRQF | VPRNP |
Rated capacity | 1–50MPa | 1–50MPa | 1–100MPa | 100–1700kPa 100–1700kPa(abs) |
Accuracy (Applicable Sensor element) Non Linearity / Hysteresis |
±0.5%R.C. | ±0.8%R.C. | ±0.8%R.C. (100MPa: ±1%R.C.) |
±0.25%R.C. |
Connection Screw | G3/8 | R3/8 | G3/8 (100MPa: G1/2) |
R3/8, G3/8 |
Material | SUS630 or 15-5PH (precipitation-hardened stainless steel) | SUS316L | ||
Accessories | 1 Aluminum packing (50MPa: 1 Copper packing) |
- | 1 Copper packing | - |
Zener-barrier model
MTL761ac / MTL764ac | (Accessories: Bus bar IS-BB-2P Clip for a flat mounting SMC7(Set of 4)) |
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Model Selection
Photo | ①Model | ②Rated Capacity(R.C.) | ③Cable Connection | ④Connection Screw | ⑤Other length | Link | |
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VPRF | 1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 50MP(50MPa) |
Blank (Standard connector) W (Waterproof connector) |
G3/8 | 3m(Standard) 5m 10m □□m If you prefer other length(*3) |
VPRF | ||
VPRQ | 1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 35MP(35MPa) 50MP(50MPa) |
R3/8 | VPRQ, VPRQF |
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VPRQF | 1MP(1MPa) 2MP(2MPa) 5MP(5MPa) 10MP(10MPa) 20MP(20MPa) 35MP(35MPa) 50MP(50MPa) 100MP(100MPa) |
G3/8 (100MPa: G1/2) |
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VPRNP | Guage Pressure | 100(100kPa) 200(200kPa) 700(700kPa) 1700(1700kPa) |
R3/8 G3/8 Specify thread size. |
VPRNP | |||
Absolute Pressure | 100A(100kPa abs) 200A(200kPa abs) 700A(700kPa abs) 1700A(1700kPa abs) |
- Note
- *1 Always use in combination with VALCOM amplifier.
Models are subject to change in part due intrinsic safety or explosion-proof purpose. Always contact our sales office for confirmation. - *2 Please order the cable length between VALCOM amplifier and Zener-barrier.
- *3 Between Conformity sensor and Zener-barrier use dedicated to cable for safe explosion-proof. (Max 200m / VPRNP guage pressure · W(Waterproof connector): Max 100m)
Examples of explosion-proof construction
①Ignition temperature | ||
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Ignition temperature | Ignition point | Limit of temperature rise (°C) |
G1 | Over 450°C | 320 |
G2 | Over 300°C up to 450°C | 200 |
G3 | Over 200°C up to 300°C | 120 |
G4 | Over 135°C up to 200°C | 70 |
G5 | Over 100°C up to 135°C | 40 |
G6 | Over 85°C up to 100°C | 30 |
②: Flame-proof grade explosion class (Minimum gap width to allow transmission of flame) |
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1: Over 0.6mm | ||
2: Over 0.4mm up to 0.6mm | ||
3: 0.4mm or less | ||
③: Explosion-proof construction | ||
i: Meets the requirements of intrinsically safe explosion-proof construction. | ||
d: Meets the requirements of flameproof enclosure. |
Ignition degree | G1 | G2 | G3 | G4 | G5 | G6 |
1 (Over 0.6mm) | Over 450°C | Over 300°C up to 450°C |
Over 200°C up to 300°C |
Over 135°C up to 200°C |
Over 100°C up to 135°C |
Over 85°C up to 100°C |
1 (Over 0.6mm) | Acrylonitrile Acetonitrile Acetone Ammonia Carbon monoxide Isobutyl methyl ketone 1,1-Dichloroethene 1,2,4-Trimethylbenzene Ethane Ethyl methyl ketone m-Xylene Isopropyl chloride O-Xylene Chlorobenzene Acetic acid Ethyl acetate Methyl acetate Hydrogen cyanide Ethyl bromide Styrene Toluene P-Xylene Propane Benzene Benzotrifluoride Methanol Methane |
Ethyl acrylate Eethyl acrylate Acetylacetone Trioctanoic Isobutanol Isopentane 1,2-Dichloroethane 1-Butanol 1,4-Dioxane Ethanol Epichlorohydrin Polyvinyl chloride Isoamyl acetate Isopentyl acetate Vinyl acetate Butyl acetate Propyl acetate Pentyl acetate Diisopropyl ether Cyclohexanone Thiophene 2-Propanol Butane Furan Propylene Acetic anhydride Methyl methacrylate |
1-Hexanol 1-Pentanol Butyl chloride Octane Gasoline 3-Methylhexanoic acid Cyclohexane Dimethyl ether Decane Tetrahydrofuran 2-Methylhexane Butyraldehyde Hexane Heptane Pentane |
Acetaldehyde (di) ethyl ether Dibutyl ether |
Ethyl nitrite | |
2 (Over 0.4mm up to 0.6mm) |
Coal gas (trans-)1.2-Dichloroethene |
1,3-Butadiene Ethylene Ethylene oxide Propylene oxide |
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3 (Up to 0.4mm) | Water gas Hydrogen (a) |
Acetylene (c) | Carbon bisulfide (b) | Nitric acid Ethyl |
External dimensions (Unit: mm)
Wiring diagram
Specifications | ||
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Target gas | ia2G3 | |
Operation Voltage | ±2.5 or 5V | |
Allowable voltage | AC250V 50/60Hz DC250V | |
Ambient temperature | Sensor | −20 to +60°C (VPRF, VPRQ, VPRQF) -20 to +50°C (VPRNP) |
Zener-barrier | −20 to +60°C | |
Rating of this intrinsically safe circuits | ||
Maximum voltage | 24V | |
Maximum current | 224mA | |
Maximum power | 0.522W |
Pressure Sensor