Description
The FOXBORO SMI983 is an Electrical Position Transmitter designed to convert linear or rotary movement of valve actuators into a standard 4–20 mA feedback signal. It provides accurate valve position measurement for process control systems, allowing operators and control systems to monitor actuator position in industrial applications.
The SMI983 uses a two-wire current transmission design and supports direct or reverse signal configuration. It is commonly installed on control valves, diaphragm actuators, and rotary actuators in process industries such as chemical, oil & gas, power generation, and water treatment systems.
SMI983
⚙️ Product Features
• Converts valve actuator position into a load-independent 4–20 mA DC feedback signal.
• Supports linear stroke measurement from 5 to 100 mm and rotary angle measurement from 30° to 120° with suitable adapters.
• Two-wire loop-powered design for simplified field installation.
• Easy zero and span adjustment using push buttons.
• LED indicators provide operating and diagnostic status.
• Supports NAMUR mounting according to IEC 534 Part 6.
• Available with intrinsic safety protection options for hazardous environments.
• Suitable for valve position feedback and industrial process automation applications.
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | FOXBORO / Foxboro Eckardt |
| Model | SMI983 |
| Series | Foxboro Valve Positioner / Position Transmitter |
| Product Name | Electrical Position Transmitter 4–20 mA |
| Place of Manufacture | France / Germany |
| Product Status | New Surplus / Original Replacement Spare |
| Dimensions | Approx. 150 × 150 × 100 mm |
| Weight | Approx. 1.0 kg |
| Country of Origin | France |
| Power Requirements | 12–36 VDC (loop powered) |
| Discontinued | No, but commonly supplied through industrial spare parts channels |
❓ Frequently Asked Questions
🔹 Q: What is the main function of FOXBORO SMI983?
A: The SMI983 measures valve or actuator movement and converts the position into a 4–20 mA electrical feedback signal for process control systems.
🔹 Q: Is SMI983 a valve positioner?
A: It is a position transmitter used for position feedback. It can be installed with valve actuator systems but does not replace a complete pneumatic or intelligent positioner.
🔹 Q: What output signal does SMI983 provide?
A: It provides a standard 4–20 mA current output signal for industrial control and monitoring systems.
🔹 Q: What type of actuators can use this transmitter?
A: It can be used with linear stroke valves and rotary actuators with compatible mounting accessories.
🔹 Q: What power supply is required?
A: The unit operates from a DC loop supply, typically 12–36 VDC depending on system configuration.
🔹 Q: Can the output direction be adjusted?
A: Yes. The feedback signal can be configured for direct or reverse operation.
🔹 Q: What industries use the FOXBORO SMI983?
A: Typical applications include chemical plants, oil & gas facilities, power stations, water treatment plants, and industrial process control systems.
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