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EX Series Limit Switch

Brand: A-T Controls, Inc.
The Triac EX Series hazardous location Limit Switch provides a compact design and low cost for both visual and remote electrical indication of rotary valve/actuator position. The heavy duty design and wide variety of options make the EX Series the ideal multi-purpose Limit Switch for use in NEMA 4, 4X, 7 and 9 applications.
Features
  • Aluminum housing: Polyester powder coating 
  • Twin shaft body design: The primary shaft is located in the housing base and connects to a mating shaft located in the housing cover. This twin shaft feature allows easy and accurate housing assembly by eliminating the blind-hole configuration associated with competitive switch boxes 
  • Multiple switch options: Wide variety of mechanical, proximit and inductive switch options provide the most effective and economical choice for each specific application 
  • Visual position indication: The 3D rotor provides high visibility confirmation of valve/actuator position. The splined retainer allows adjustment to coincide with the exact valve position 
  • "Easy-set" cams: Splined, spring loaded and independently adjustable. This design offers tool-free calibration and positive vibration resistant engagement 
  • Multiple cable entries: Standard with two 1/2" NPT cable entries with option for third 1/2" or 3/4" NPT cable entry. 
  • Standardized mounting: ISO F05 mounting pattern and VDI/VDE3845 shaft 
  • Options: AS-i digital communication interface card, 3-position dribble control, 4 to 20 mA feedback transmitter, special terminal strips, NAMUR mounting brackets 
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The Triac EX Series hazardous location Limit Switch provides a compact design and low cost for both visual and remote electrical indication of rotary valve/actuator position. The heavy duty design and wide variety of options make the EX Series the ideal multi-purpose Limit Switch for use in NEMA 4, 4X, 7 and 9 applications.
Features
  • Aluminum housing: Polyester powder coating 
  • Twin shaft body design: The primary shaft is located in the housing base and connects to a mating shaft located in the housing cover. This twin shaft feature allows easy and accurate housing assembly by eliminating the blind-hole configuration associated with competitive switch boxes 
  • Multiple switch options: Wide variety of mechanical, proximit and inductive switch options provide the most effective and economical choice for each specific application 
  • Visual position indication: The 3D rotor provides high visibility confirmation of valve/actuator position. The splined retainer allows adjustment to coincide with the exact valve position 
  • "Easy-set" cams: Splined, spring loaded and independently adjustable. This design offers tool-free calibration and positive vibration resistant engagement 
  • Multiple cable entries: Standard with two 1/2" NPT cable entries with option for third 1/2" or 3/4" NPT cable entry. 
  • Standardized mounting: ISO F05 mounting pattern and VDI/VDE3845 shaft 
  • Options: AS-i digital communication interface card, 3-position dribble control, 4 to 20 mA feedback transmitter, special terminal strips, NAMUR mounting brackets 

Specifications

Actuator Type

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

Approvals & Certifications

  • cUL, Class I, Division 1, Groups C, D, Class II, Division 1, Groups E, F, G
  • UL: Class I, Division 1, Groups C, D, Class II, Division 1, Groups E, F, G

Cable Entry

  • 1/2" NPT
  • 3/4" NPT

Communication

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

Conduit Connection

  • 1/2" NPT
  • 3/4" NPT

Cover Material

  • Aluminum

Electrical Connectors

  • 4-20 mA Transmitter
  • Terminal Strip

Electrical Contacts

  • Gold-Plated: SPDT
  • 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

Enclosure, Body Material

  • Aluminum

Environmental Protection

  • Hazardous Area
  • IP65
  • IP67
  • NEMA 4
  • NEMA 4X
  • NEMA 7
  • NEMA 9

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, Maximum
  • 4 A, Maximum

Mounting

  • ISO F05 Mounting Pattern
  • VDI/VDE 3845 Shaft

Operating Temperature

  • -25° to 80° C (-13° to 176° F) - for Division 1
  • -40° to 80° C (-40° to 176° F) - for Division 2

Output

  • 4-20 mA

Sensor, Probe Connection

  • 2-Wire, 5 to 200 mA, 20-140 V (AC or DC): Solid State Sensor
  • 3-Wire, PNP, 5 to 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 Type

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