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Floating Point to Pneumatic Output Transducer for 20 to 25 psig Air Supply Pressure
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PTS4-1

Floating Point to Pneumatic Output Transducer for 20 to 25 psig Air Supply Pressure

  • Converts floating point control to pneumatic output: PTS4.1 modules convert digital increase/decrease signals into proportional pneumatic pressure for pneumatic actuators.
  • Selectable pressure ranges: Jumper-selectable outputs support 0-10 psig, 5-15 psig, or 0-15 psig to match common pneumatic damper and valve actuator requirements.
  • Closed-loop pressure control: Onboard microprocessor and solid-state pressure transducer help maintain the last commanded branch line pressure.
  • Ideal for HVAC pneumatic control: Useful for pneumatic damper motor control, pneumatic valve actuator control, compressor staging, and electric control of pneumatic actuators.
  • Smooth output resolution: Full-scale pressure change occurs in 90 seconds with 255 steps of resolution for controlled pneumatic positioning.
  • Flexible input compatibility: Accepts relay contact closures, transistor outputs, or triac inputs without additional accessories.
  • Power-loss pressure behavior: On power failure, both valves close to shut off main air and branch line bleed, helping hold branch pressure if the line does not leak.
  • Optional gauge model: PTS4.1G includes gauge capability for local branch pressure indication during setup and service.
  • Panel-friendly installation: Snaptrack mounting, 90° pluggable screw terminals, removable brass fittings, and 1/4" OD poly tubing compatibility simplify installation.
  • Backed by ACI quality: RoHS2 and WEEE compliant, with ACI’s two-year limited warranty.
PTS4-1
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PTS4-1Data Sheet

Data Sheet
Floating Point to Pneumatic Output Transducer for 20 to 25 psig Air Supply Pressure PTS4-1 PTS4-1
Product Overview
  • Accuracy ± 2 %
  • Accuracy Detail Gauge Pressure Accuracy (Gauge Models): ± 2.5% Midscale (± 3.5% Full Scale)
  • Air Consumption 2300 SCIM
  • Air Supply Pressure, Max 25 psi
  • Air Supply Pressure, Min 20 psi
  • Applications Building and Maintenance, Pneumatic Systems
  • Approvals RoHS2, WEEE
  • Contact Fail-Safe No failsafe
  • Control Valve 2 Valve
  • Electrical Connection Screw Terminal
  • Filter Furnished with integral-in-barb 80-100 micron lter (Part # PN004)
  • Gauge Type No Gauge
  • Height 2.95 in
  • Input Note Digital Input Signal Source: Two (2) Relay Contact Closures, Transistors or TRIACs (no accessories required); Digital Input Signal Trigger Level (@ Impedance): 9-24 VAC @ 750Ω
  • Input Type Floating Point
  • Length 3.25 in
  • Materials PVC
  • Operating Humidity 10 to 95% RH, non-condensing
  • Operating Temperature, Max 120 °F
  • Operating Temperature, Min 35 °F
  • Output Pressure Range 0 to 10 psi, 0 to 15 psi, 5 to 15 psi
  • Power Consumption 3.6 VA
  • Pressure Note Gauge Pressure Range (Gauge Models): 0-30 psig (0-200 kPa)
  • Pulse Measurement Range 90 sec
  • Sampling Rate 90 Seconds
  • Series ID PTS4-1
  • Spec Sheet QR URL https://www.dwyeromega.com/en-us/floating-point-to-pneumatic-output-transducer-for-20-to-25-psig-air-supply-pressure/PTS4-1/p/PTS4-1?guid=701a700000ulrduaaq&utm_source=spec-sheet&utm_medium=qr-code&utm_campaign=prd-sku-spec-sheet&utm_content=auto-generated-sku-level-spec-sheet
  • Storage Temperature, Max 150 °F
  • Storage Temperature, Min -10 °F
  • Supply Voltage 24 Vac/Vdc
  • Tightening Torque 0.5 Nm (Minimum); 0.6 Nm (Maximum)
  • Tube Size 1/4 in OD x 1/8 in ID
  • Weight 0.61 lb
  • Width 2.18 in
  • Wire Gauge 26 to 16 AWG

Supported Applications

The ACI PTS4-1 Floating Point to Pneumatic Output Transducer converts two digital signals from relay contact closures, transistors, or triac inputs into a proportional pneumatic signal. The series is designed for applications including:

  • Pneumatic Damper Motor Control
  • Pneumatic Valve Actuator Control
  • Compressor Staging
  • Electric control of any Pneumatic Actuator

The device utilizes a closed-loop electronic design where an on-board microprocessor measures signal input and a solid-state pressure transducer measures branch line pressure to automatically increase or decrease air pressure.

Operating Conditions & Performance

The PTS4-1 operates with a supply voltage of 24 VAC +/-10% at terminals | 50 or 60 Hz. It requires an air supply pressure between 20 psig (138 kPa) minimum and 25 psig (172 kPa) maximum. The pneumatic output changes full scale in 90 Seconds with a resolution of 255 steps.

Accuracy is specified as 2% @ room temperature or 3% @ full range of operating temperature. For models equipped with an optional gauge, the Gauge Pressure Range is 0-30 psig (0-200 kPa) with a Gauge Pressure Accuracy of ± 2.5% Midscale (± 3.5% Full Scale). The unit operates within an ambient temperature range of 35 to 120°F (1.7 to 48.9°C) and humidity from 10 to 95% non-condensing.

In the event of a power failure, both valves close, shutting off main air and branch line bleed. During a power brown-out, pressure output remains constant while the processor shuts down; upon restoration of proper power levels, the processor reboots and defaults the branch pressure output to 0 psig.

Configuration Options

The series supports three jumper-selectable pneumatic output ranges:

  • 0-10 psig (0-68.95 kPa)
  • 5-15 psig (34.47-103.43 kPa)
  • 0-15 psig (0-103.43 kPa)

Pneumatic connections utilize removable brass barbed fittings for Main and Branch in a machined aluminum manifold, compatible with 1/4" O.D. nominal (1/8" I.D.) polyethylene tubing. The unit is furnished with an integral-in-barb 80-100 micron filter (Part # PN004). Electrical connections are made via 90° Pluggable Screw Terminal Blocks accepting wire sizes from 16 AWG to 26 AWG.

Available options and accessories include:

  • Gauge installed at additional cost
  • DIN Rail Adapter Kit (A/DRC 2.7 X 2.18)
  • Transient Voltage Suppressor, Bi-directional, 56 VAC/DC, 1500W (A/D0008)
  • Replacement Filter Media in Barb Fitting (A/PN004)
  • 20 Gauge Metal Enclosure (ENC1)

The Snaptrack material is Polyvinyl Chloride (PVC) with a UL94 V-0 flammability rating. Agency approvals include RoHS2 and WEEE.

Key Product Differences

The series includes two primary configurations:

  • PTS4.1: Floating Point to Pneumatic Output Transducer without gauge (Dimensions: L 3.25" x W 2.18" x H 1.87").
  • PTS4.1G: Floating Point to Pneumatic Output Transducer with Gauge installed (Dimensions: L 3.69" x W 2.30" x H 2.95").

The PTS4.1 output is factory calibrated in all jumper selectable pressure output ranges; adjustments to zero or gain potentiometers are not permitted.

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