AT SS2, RSS2 & SS2S Smart Valve Positioner

Brand: A-T Controls, Inc.
SS2 Linear / Rotary Smart Valve Positioner Smart performance with innovative and ever-strong coil drive even under harsh working environments.
Features
  • Easy and Quick Auto-calibration 
  • Detecting RA (Reverse Acting) or DA (Direct-Acting) Automatically Regardless of Wrong Air Connections 
  • Available to Use for Single or Double Acting without any Special Adjustments 
  • Compact Design Allowing to be Installed on Small Actuators 
  • Provide Error Messages Against Performance Failures 
  • Possible to Test the Actuator with any Fixed Signal Under a Test Mode 
  • Programmable Characteristic Curve with 17 Points 
  • Wide Operating Temperature Range -30° to 80° C 
  • Improved Control of High-friction Globe and Ball Valves by Eliminating Overshoot and Hunting 
  • Low Air Consumption 
  • Mounting Bracket to Meet IEC 60534-6-1 for Linear Valves 
  • Support a NAMUR Mounting Pattern VDI/VDE 3845 (IEC 60534-6-2) and Providing a Multi-size Mounting Bracket for Rotary Valves 
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SS2 Linear / Rotary Smart Valve Positioner Smart performance with innovative and ever-strong coil drive even under harsh working environments.
Features
  • Easy and Quick Auto-calibration 
  • Detecting RA (Reverse Acting) or DA (Direct-Acting) Automatically Regardless of Wrong Air Connections 
  • Available to Use for Single or Double Acting without any Special Adjustments 
  • Compact Design Allowing to be Installed on Small Actuators 
  • Provide Error Messages Against Performance Failures 
  • Possible to Test the Actuator with any Fixed Signal Under a Test Mode 
  • Programmable Characteristic Curve with 17 Points 
  • Wide Operating Temperature Range -30° to 80° C 
  • Improved Control of High-friction Globe and Ball Valves by Eliminating Overshoot and Hunting 
  • Low Air Consumption 
  • Mounting Bracket to Meet IEC 60534-6-1 for Linear Valves 
  • Support a NAMUR Mounting Pattern VDI/VDE 3845 (IEC 60534-6-2) and Providing a Multi-size Mounting Bracket for Rotary Valves 

SS2, RSS2 & SS2S

Model

Actuator Operation

Protection Class

Feedback Lever

Feedback Lever

Pressure Gauge

By-pass

Position Feedback

Communication

Connection Threads

Mounting Bracket

Feedback Pin Guide Lever Set

Cable Length

Specifications

Actuator Type

  • Linear (Direct-Acting, Reverse Acting)
  • Rotary (Spring Return, Double-Acting)

Air Consumption

  • 0.07 scfm (14 Nm³/hour) (2 L/minute) at psig: 20 to 90 (kPa: 137.9 to 620.5, bar: 1.37 to 6.20) Supply Pressure

Air Flow Capacity

  • 2.8 scfm (4.8 Nm³/hour) (80 L/minute) at psig: 20 (kPa: 138, bar: 1.38) Supply Pressure
  • 8.2 scfm (14 Nm³/hour) (233 L/minute) at psig: 20 (kPa: 138, bar: 1.38) Supply Pressure

Air Supply

  • psi: 20 to 100 (kPa: 140 to 700, bar: 1.4 to 7), Filtered, Compressed Dry & Non-Oiled to Meet Class 3 of ISO 8573-1

Alarm

  • High/Low

Ambient Temperature Range

  • -30° to 85° C (-22° to 185° F) - Micro Switches

Approvals & Certifications

  • ATEX Intrinsically Safe: Ex Ia IIC T5
  • CE
  • IEC 60534-6-1, 60534-6-2
  • IEC Ex Intrinsically Safe: Ex Ia IIC T5
  • ISO 8573-1
  • KC Intrinsically Safe: Ex Ia IIC T5

BSP Connection

  • 1/4" BSPT Female - Pneumatic Connection for 1/4" BSPT

Cable Length

  • 9.8 to 49.2 (3 to 15 meters) - RSS2

Communication

  • FOUNDATION Fieldbus
  • HART
  • Profibus

Current

  • 3.6 mA Minimum
  • 30 mA DC - Output Current Limit of Position Transmitter
  • 50 mA - Maximum

Deadband

  • 0 to 9.99%

Display

  • 4-Digit LCD

Electrical Connectors

  • 1/2" NPT
  • G 1/2"
  • M20 x 1.5

Electrical Rating

  • 10.1 A at 250 Vac - Micro Switches

Enclosure Finish

  • Powder Paint Coated

Enclosure, Body Material

  • 316 Stainless Steel - SS2S
  • Aluminum Die Cast

Environmental Protection

  • Weatherproof to IP66

Hysteresis

  • < 0.2% of Full Scale

Input Signal

  • 4-20 mA at 24 Vdc

Linearity

  • <± 0.3% of Full Scale
  • ± 0.5% of Full Scale - Position Transmitter

Linearization

  • User Set (17-Points) - Performance Characteristic

Mounting

  • Fork Lever - for Rotary Typical
  • NAMUR VDI/VDE 3845 (IEC 60534-6-2) - Rotary Typical

NPT Connection

  • 1/4" NPT Female - Pneumatic Connection

Operating Temperature

  • -30° to 80° C (-22° to 176° F)

Output

  • 20-4 mA
  • 4-20 mA, 2-Wire - Position Transmitter

Output Pressure

  • 0 to 100% of Supply Air Pressure psi: 20 to 100 (kPa: 140 to 700, bar: 1.4 to 7)

Power Supply

  • 12-30 Vdc - Position Transmitter

Pressure Range

  • psi: 150 (kPa: 1,000, bar: 10) - Gauge Block
  • psi: 90 (kPa: 620.5, bar: 6.205) - Gauge Block

Pressure Type

  • Gauge

Range

  • 0 to 10% of Position Signal - Shut-Off Value

Repeatability

  • < 0.2% of Full Scale

Scan Time

  • 2 milliseconds

Sensitivity

  • < 0.2% of Full Scale

Span & Zero Adjustments

  • 0 to 100% - Span Adjustment
  • 0 to 99% - Zero Adjustment

Switch Quantity

  • 2 Switches

Switch Type

  • Microswitch (SPDT)

Voltage Drop

  • 8.7 Vdc (435 ohms at 20 mA) - without HART
  • 9.4 Vdc (470 ohms at 20 mA) - with HART

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