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EW Series Limit Switch

Brand: A-T Controls, Inc
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The TRIAC® EX, EC/ES, EY, and EW Series Hazardous Area Limit Switches provide compact design and low cost for both visual and remote electrical indication of rotary valve/actuator position.

Their heavy duty design and wide variety of options make them ideal for multi-purpose limit switch applications.
Features
  • Twin Shaft Body Design
  • "Easy-set" Cams
  • Multiple Switch Options
  • Valve Position Indicator
  • 1/2" or 3/4" NPT Conduit Entries
  • Standard NAMUR Mounting Brackets
  • L316 Stainless Steel Housing
  • UL Listed Type 4, 4X, 7 and 9, Explosion-proof and Weather-proof
  • Up to Four Conduit Entries with Extra Terminal Options
The TRIAC® EX, EC/ES, EY, and EW Series Hazardous Area Limit Switches provide compact design and low cost for both visual and remote electrical indication of rotary valve/actuator position.

Their heavy duty design and wide variety of options make them ideal for multi-purpose limit switch applications.
Features
  • Twin Shaft Body Design
  • "Easy-set" Cams
  • Multiple Switch Options
  • Valve Position Indicator
  • 1/2" or 3/4" NPT Conduit Entries
  • Standard NAMUR Mounting Brackets
  • L316 Stainless Steel Housing
  • UL Listed Type 4, 4X, 7 and 9, Explosion-proof and Weather-proof
  • Up to Four Conduit Entries with Extra Terminal Options
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Specifications

Brand

Actuator Type

  • Double-Acting Actuator (3-Position)
  • Spring Return Actuator (3-Position)

Approvals & Certifications

  • cUL, Class I, Div. 1, Groups B, C, D, Class II, Div. 1, Groups E, F, G
  • UL: Class I, Div. 1, Groups B, C, D, Class II, Div. 1, Groups E, F, G

Communication

  • AS-Interface Protocol
  • DeviceNET Protocol: Two Inputs, 100 mA Output

Conduit Connection

  • 1/2” NPT
  • 3/4” NPT

Cover Material

  • Stainless Steel

Electrical Connectors

  • 4-20 mA Transmitter
  • Terminal Strip

Electrical Contacts

  • Gold-Plated: DPDT
  • Silver-Plated: SPDT & DPDT

Electrical Rating

  • 0.1 A at 120 Vac Resistive: Mechanical SPDT Gold-Plated
  • 0.25 A at 120 Vac, Resistance: Proximity Reed SPST, SPDT, DPDT
  • 0.416 A at 48 Vdc, Resistive: Proximity Reed SPST, SPDT, DPDT
  • 0.5 A at 24 Vdc Resistive/Inductive: Mechanical SPDT Silver-Plated
  • 0.55 A at 24 Vdc, Resistive/Inductive: Proximity Reed (Bifurcated) SPST
  • 1 A at 125 Vac, Resistive: Proximity Reed (with LED) SPST, Nova V3 Proximity SPDT Gold-Bifurcated Hermetically Sealed
  • 1 A at 30 Vdc: Nova V3 Proximity SPDT Gold-Bifurcated Hermetically Sealed
  • 1.5 A at 120 Vac: Proximity Reed (Bifurcated) SPST
  • 1/4 hp at 125 Vac Resistive/Inductive: Mechanical DPDT Silver-Plated
  • 5 A at 250 Vac Resistive/Inductive: Mechanical SPDT & DPDT Silver-Plated, Nova V3 Proximity SPDT Silver-Oxide Hermetically Sealed
  • 5 A at 28 Vdc: Nova V3 Proximity SPDT Silver-Oxide Hermetically Sealed

Enclosure Finish

  • Black Polyester Powder-Coated
  • Electro-Polishing

Enclosure, Body Material

  • 316 Stainless Steel

Environmental Protection

  • Explosion-proof
  • NEMA 4
  • NEMA 4X
  • NEMA 7
  • NEMA 9
  • Weatherproof

Indication

  • 3-Way Block Center
  • 3-Way Indicator [L or T Port]
  • Green Status Light
  • Red Status Light
  • Visual Indicator with Twin Shaft Design

Load

  • 0.5 A, Max.
  • 4 A, Max.

Mounting

  • ISO F05 Mounting Pattern
  • VDI/VDE 3845 Shaft

Output

  • 4-20 mA

Sensor, Probe Connection

  • 2-Wire, 5-200 mA, 20-140 V (AC or DC): Solid State Sensor
  • 3-Wire, PNP, 5-100 mA at 30 Vdc, Amplified: Solid State Sensor

Sensor, Probe Type

  • Solid State Sensor

Supply Voltage

  • 9-30 Vdc: Transmitter
  • NAMUR 2-Wire, 8 Vdc: Solid State Sensor

Switch Quantity

  • Up to 6 Switches

Switch Type

  • DPDT
  • Limit
  • Mechanical
  • Proximity Reed
  • Silver-Oxide & Gold-Bifurcated Hermetically Sealed
  • SPDT
  • SPST

Temperature Range

  • -40° to 80° C (-40° to 176° F)
  • -60° C (-76° F): Low Temperature Rating Down
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