Axiom AX Series Explosion-Proof Limit Switch

Brand: Valmet
StoneL Explosion-proof Limit Switch, AX Series
StoneL Explosion-proof Limit Switch, AX Series
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Axiom AX Series Explosion-Proof Limit Switch

Brand: Valmet
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The Axiom explosionproof platform, available in epoxy-coated anodized aluminum or stainless steel, will withstand your most challenging plant environments.

It features advanced position monitoring and integral pneumatic control.
Features
  • Universal burn out proof solenoid operates on less than 0.6 watts of power and standard version will accept 24 Vdc or 120 Vac, reducing stocking requirements
  • Prefiltered pilot valve provides additional protection from contaminants
  • Integral pneumatic valve operates on standard plant air, will cycle most actuators in less than two seconds, and is modularized for easy clean out if fouling occurs
  • Standard 5-way, 2-position valve operates both single- and double-acting actuators and features a standard rebreather to feed instrument air into spring side of actuator to keep out corrosives
  • Electronic components are sealed and potted inside function module to protect against residual moisture, vibration, and corrosives
  • No bushings or shafts will wear out. Electronic module, with magnetically driven position sensor, is fully isolated from the outside environment. Actuator wear causing shaft “wobble” will not affect monitoring performance

Specifications

Brand

Accuracy

  • Expeditor Intermediate Control Accuracy: ± 3° of Rotation
  • Expeditor Position Monitoring Accuracy: ± 1° of Rotation
  • HART with Diagnostics Pressure Accuracy: ± 1 % of Full Scale
  • Position Sensor System Accuracy: within 1°

Actuator Type

  • Double-Acting
  • Single-Acting

Approvals & Certifications

  • ATEX II 2 G Ex d IIC T4/T5/T6 Gb IP66/67
  • CE 1725
  • FM Class I, Div. 1, Groups B, C, D & Class II, Div. 1, Groups E, F, G
  • IEC 61508 Parts 1-7: 2010 & IEC 61511-1: 2003 + Corr. 1: 2004
  • IEC Ex d IIC T4/T5/T6 Gb IP66/67
  • INMETRO Ex d IIC T6 to T4 Gb
  • TR CU 1Ex d IIC T4/T5/T6 Gb x  IP66/67

Cap Material

  • 316 Stainless Steel

Conduit Connection

  • 3/4” NPT
  • M25

Configuration

  • 2-Wire Solid State Switches
  • 4-20 mA
  • Auxiliary Discrete Input
  • Discrete Position Sensor Input
  • Discrete Sensor Input
  • Dual Pilot
  • Low Air Supply Pressure Input
  • Modified Output Block
  • Multiple DI/DO Blocks
  • Parameter Bit Spring
  • Peripheral Fault Bit
  • Power Output
  • Remote Sensor Setting
  • Single Pilot
  • Solenoid Power Input
  • Stuck Valve/Actuator Input
  • Wink Feature

Current

  • HART with Diagnostics Current Output: 4-20 mA
  • NAMUR Sensor Current Rating: Target Off I > 2.1 mA
  • NAMUR Sensor Current Rating: Target on I < 1.0 mA
  • Stainless Steel Sensor 33 & 35 Min. on Current: 2 mA
  • Stainless Steel Sensor 33 & 35, Max.

Deadband

  • 6° from Set Point - Rotational Distance from Original Set Point where Switch Will De-Energize

Display

  • LEDs

Electrical Rating

  • Piezo Pilot Electrical Rating (_A Option): 2 mA at 6.5 Vdc
  • Solenoid Pilot Electrical Rating (_D Option): 0.5 W at 24 Vdc
  • Solenoid Pilot Electrical Rating (_E Option): 0.5 W at 12 Vdc (Intrinsically Safe)
  • Solenoid Pilot Electrical Rating (_H Option): 0.6 W at 22-250 Vac/Vdc

Enclosure, Body Material

  • Enclosure & Manifold / Mounting Plate: Epoxy Coated Anodized Aluminum
  • Enclosure & Manifold / Mounting Plate: Stainless Steel

Environmental Protection

  • IP66
  • NEMA 4
  • NEMA 4X

Filter

  • Piezo Pilot Filtration Requirements: Dried / 30 micron
  • Pneumatic Valves & Solenoid Pilot Filtration Requirement: 40 micron (Piezo, 30 micron)

Input

  • Expeditor Position Feedback Control (Analog Input): 4-20 mA Loop
  • Expeditor Position Feedback Control (Analog Input): 9-35 Vdc
  • Stainless Steel Sensor 33 Solenoid Input: 22-130 Vac/Vdc
  • Stainless Steel Sensor 35 Solenoid Input: 20-250 Vac
  • Stainless Steel Sensor 35 Solenoid Input: 20-60 Vdc
  • VCT with Extended Addressing Auxiliary Input: 24 Vdc at 2 mA (Self-Powered)

Loop Resistance

  • HART with Diagnostics Loop Resistance: 250 ohms (Min) to 400 ohms, Max.

Materials of Construction

  • Pneumatic Valve Spool (Stainless Steel Enclosure): Nickel-Plated Teflon Coated Stainless Steel
  • Pneumatic Valve Spool Seals (Aluminum Enclosure): Nitrile Compound
  • Visual Indicator Lens: Lexan Polycarbonate

Maximum Current

  • Stainless Steel Sensor 33 & 35, Max.
  • VCT with Diagnostics, Max.
  • VCT with Extended Addressing, Max.
  • VCT, Max.

Mounting

  • 316 Stainless Steel
  • NAMUR VDI/VDE 3845

O-Ring Material

  • Nitrile

Operating Pressure

  • psi: 40 to 120 (kPa: 275.8 to 827.4, bar: 2.8 to 8.3)

Operating Temperature

  • Piezo Pilot Operating Temperature: -10° to 60° C (14° to 140° F)
  • Solenoid Pilot Operating Temperature Extended (0.7 CV): -40° to 80° C (-40° to 176° F)
  • Solenoid Pilot Operating Temperature Standard (0.7 CV): -18° to 50° C (0° to 122° F)
  • Solenoid Pilot Operating Temperature Standard (1.2 CV): -10° to 50° C (14° to 122° F)

Operation

  • NAMUR Sensor Operation: Normally Closed (Solid State)
  • Stainless Steel Sensor 33 & 35 Operation: Normally Open (Solid State)

Output

  • 4 W at 24 Vdc
  • Expeditor Intermediate Position Control (Analog Output): 4-20 mA Loop
  • Expeditor Intermediate Position Control (Analog Output): 9-35 Vdc
  • VCT Bus Powered Output: 2 mA at 6.5 Vdc Each, Current Limited to 2 mA (Bus Powered)
  • VCT with Diagnostics Output, Voltage: 24 Vdc
  • VCT with Diagnostics Output: 0.5 W at 24 Vdc
  • VCT with Extended Addressing Output: 2 W at 24 Vdc

Override

  • External Latching
  • External Momentary
  • Internal Momentary Standard

Port

  • 1/4” NPT
  • 3/8”

Power

  • 0.02 A at 24 Vdc
  • 0.04 A at 12 Vdc

Range

  • NAMUR Sensor Voltage Range: 7-24 Vdc
  • Stainless Steel Sensor 33 Voltage Range: 20-125 Vac / 125 Vdc

Rating

  • 0.70 CV
  • 1.2 CV

Repeatability

  • 1°

Rotation

  • 120°

Seat / Seal Material

  • Nitrile
  • Polysulfone

Set Point Range

  • 4° from Set Point - Rotational Distance from Original Set Point where Switch Will Energize on Return Stroke

Supply Pressure

  • psi: 40 to 120 (kPa: 275.8 to 827.4, bar: 2.7 to 8.2)

Temperature Range

  • Expeditor Temperature Rating (Extended): -20° to 80° C (-4° to 176° F)
  • Expeditor Temperature Rating (Standard): -18° to 50° C (0° to 122° F)

Voltage

  • 21-26 Vdc
  • 24 Vdc
  • Expeditor Solenoid Voltage (Intrinsic Safety Models): 12 Vdc
  • HART with Diagnostics Voltage: 14-35 Vdc (24 Vdc Nominal)
  • Stainless Steel Sensor 35 Voltage Range: 20-250 Vac
  • Stainless Steel Sensor 35 Voltage Range: 8-250 Vdc

Voltage Drop

  • Stainless Steel Sensor 33 & 35, Max.

Documentation

Data Sheets

Certifications & Approvals

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