FULL TECHNICAL SPECIFICATION

SAMSON 3730-3 Digital Positioner (HART Capable)

GENERAL INFORMATION

Manufacturer: SAMSON AG

Manufactured In: Frankfurt, Germany

Product Type: Electro-Pneumatic Digital Valve Positioner

Communication Protocol: HART (Highway Addressable Remote Transducer Protocol)

Model Number: 3730-3100000400000000.01

Var-ID: 2894657

Serial Number: 2109627

Application: For linear and rotary control valves in process automation systems

ELECTRICAL SPECIFICATIONS

Input Signal Type: 4–20 mA DC (two-wire, loop-powered)

HART Communication: Superimposed on 4–20 mA analog signal

Electrical Connection: Terminal block connection inside enclosure

Operating Voltage: Derived from input current loop

Power Consumption: Low-power operation, loop-powered design

PNEUMATIC SPECIFICATIONS

Max. Supply Pressure: 7 bar / 105 psi

Air Supply Quality: Clean, dry, oil-free instrument air as per ISO 8573-1

Pneumatic Output: Continuously variable, modulating actuator position

Air Connections: Typically G 1/4 or NPT 1/4 (configurable per order)

OPERATING CONDITIONS

Ambient Temperature Range:

Standard: −20°C ≤ Ta ≤ +60°C

Extended Option: −45°C ≤ Ta ≤ +60°C

Storage Temperature: Typically same as operating limits

Temperature Classifications:

T6 (gas) — up to +60°C

T80°C (dust)

EXPLOSION PROTECTION / CERTIFICATIONS

Gas Atmospheres:

II 2 G Ex ia IIC T6*

Dust Atmospheres:

II 2 D Ex tD A21 IP66 T80°C

Ingress Protection (IP Rating): IP66 (Dust tight and protected against powerful water jets)

Compliance:

ATEX Certified (PTB 02 ATEX 2174)

CE Marked

Conforms to European Directives

ENCLOSURE / MECHANICAL

Protection Class: IP66 (in accordance with EN 60529)

Material: Corrosion-resistant, industrial-grade housing

Enclosure Type: Weatherproof, suitable for harsh industrial and outdoor environments

Weight: Varies by mounting type (typically between 2.5–3.5 kg)

Mounting:

NAMUR standard for rotary actuators

Direct mounting for linear actuators (per SAMSON guidelines)

DISPLAY / INTERFACE

Local Display (Optional): LCD display with configuration buttons

LED Status Indicators: Visual operational status (varies by model option)

Manual Configuration: Local keys or via HART handheld communicator

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