SMC IITV23 Series Plug-in Electro-Pneumatic Regulator / Manifold Type

Introduction and Benefits

The SMC IITV23 Series offers a plug-in electro-pneumatic regulator designed for manifold mounting, significantly reducing wiring and piping labor. This system streamlines installation, decreases man-hours, and results in a more compact footprint compared to traditional setups. It connects electro-pneumatic regulators and fieldbus devices, such as PROFINET, to the same manifold.

Key advantages include:

• Wiring/Piping Reduction: Demonstrates substantial savings in wiring and piping compared to existing types, requiring only one power supply cable and fewer pipes for supply and output. For example, a new type might use 5 pipes total (1 SUP, 4 OUT) versus an existing type's 8 pipes (4 SUP, 4 OUT), with reduced wiring complexity.
• Compact Design: Achieves a 20% reduction in installation area and a 10% reduction in occupied volume when compared to existing products with equivalent features.

Product Features

The IITV23 Series provides stepless control of air pressure in proportion to electrical signals. It supports fieldbus systems, allowing up to 4 electro-pneumatic regulators to be connected. The system features connector connections that eliminate the need for separate wiring for each regulator.

Pressure Display: Equipped with an output-side pressure display, typically a 3-digit, 7-segment LED, with accuracy options such as ±0.018 MPa or less (±1 digit).

Gain and Sensitivity Settings: Users can adjust the response characteristics and pressure correction operations through gain and sensitivity settings. The operation manual, available on the SMC website, details these setting methods.

Remote Control and Monitoring:

• Via Network (PROFINET): Enables control, parameter setting, and monitoring directly from a PLC.
• Web Server Function: Allows status checks of the EX600 and electro-pneumatic regulators using standard web browsers.

A table summarizes the availability of control, parameter setting, and monitoring features via PROFINET and the web server function for items like Control Set pressure value, Gain setting, Parameter setting, Sensitivity setting, Accumulated energizing time, I/O status, and Diagnostic state.

Applications

The IITV23 Series is suitable for various industrial applications, including:

• Actuator Output Control: Used in applications like tension control for coil winding machines and wavy surface cutting.
• Flow Rate Control: Can control flow rates by managing liquid pressure feeding via tank pressurization, by fixing the nozzle orifice.

Variations and Specifications

The series includes models like ITV234 (0 to 0.7 MPa) and ITV235 (0 to 0.9 MPa), offering precise control with key specifications:

• Linearity: ±0.009 MPa or less (±1% F.S.)
• Hysteresis: 0.0045 MPa or less (0.5% F.S.)
• Repeatability: ±0.0045 MPa or less (±0.5% F.S.)
• Sensitivity: ±0.2% F.S. or more (Input signal variation: 8/4095 or more)
• Response Time: 0.3 s or less (for 0-90% step response)
• Enclosure: IP65
• Operating Temperature: 0 to 50°C
• Supply Voltage: 24 VDC ±10%

Detailed specifications for linearity, hysteresis, repeatability, pressure characteristics, flow rate characteristics, relief characteristics, and response characteristics are provided in graphical format, showing pressure versus input signal or time, illustrating performance curves.

How to Order

Ordering involves specifying the manifold configuration and the electro-pneumatic regulators. The manifold part number structure includes options for SI unit (PROFINET), end plates, I/O unit stations, electro-pneumatic regulator stations, and P/E port entry (including built-in silencer options).

Manifold Assembly Example: A typical manifold assembly part number (e.g., IITV23-S6F22-2D) indicates the configuration, including the number of regulator stations and end plate type. Specific regulators (e.g., ITV2350-2) and I/O units (e.g., EX600-DXPD) are ordered separately.

Electro-Pneumatic Regulators: Models like ITV2340 and ITV2350 are available with different pressure ranges (0.7 MPa, 0.9 MPa) and output units (MPa, bar, psi).

SI Units: The EX600-MPN1 is the PROFINET SI unit, supporting 100 Mbps communication and featuring a web server function.

End Plates: Various end plates (EX600-ED2, ED3, ED4, ED5) are available with different power supply connector types (M12, 7/8 inch) and pin arrangements.

I/O Units: A range of digital and analog I/O units (EX600-DXPB, DXPD, EX600-AXA, etc.) are compatible.

Construction and Components

The product comprises various components including body, intermediate body, cover, base plate, supply valve, exhaust valve, diaphragm, solenoid valve, and seals. Materials range from aluminum alloy and stainless steel to rubber and resin. Exploded views detail the assembly of the manifold system, including the SI unit, regulators, end plates, and valve plates.

Manifold Assembly: Consists of manifold block assemblies, SUP/EXH end block assemblies, tie-rods, and gaskets. Options for direct mounting or DIN rail mounting are available.

Accessories

A wide range of accessories are available to complement the IITV23 Series, including:

• Power supply cables (M12 and 7/8 inch connectors)
• Communication cables (for PROFINET)
• Field-wireable connectors
• Seal caps for unused connectors
• Markers for labeling
• Valve plates
• Reinforcing braces for stability with multiple units

Dimensions

Detailed dimension drawings are provided for various configurations, specifying lengths (L1, L2, L3, L4, L5, L6, L7), mounting hole patterns, port sizes, and overall product dimensions in millimeters. These tables and diagrams illustrate the physical layout for different station counts (2, 3, 4 stations) and end plate types (M12 B-coded, 7/8 inch, M12 A-coded).

Specific Product Precautions and Safety Instructions

Operating Environment: Avoid corrosive gases, chemicals, seawater, heavy vibration, direct sunlight, and excessive heat. Protect against moisture and dust, especially at the EXH port, by extending tubing to a safe location.

Air Supply: Use clean compressed air (5 µm filtration recommended). Avoid air containing chemicals, organic solvents, or excessive carbon dust. If using fluids other than compressed air, contact SMC.

Handling: Do not use lubricators on the supply side. If power is lost, output pressure is temporarily retained; ensure safe discharge if necessary. Shut off power when supply pressure is shut off to prevent solenoid valve wear. Output pressure cannot be fully released to 0 MPa without external means. Avoid disassembly without cause. Use caution when connecting cables to avoid damaging connectors.

Electrical Safety: Ensure proper grounding. Use UL-approved power supplies for specific circuits (e.g., Class 2 circuits, limited voltage/current circuits). Operate within specified voltage ranges (24 VDC ±10%).

Mounting: Use reinforcing braces for 6 or more stations. For environments with vibration or impact, direct mounting is recommended over DIN rail mounting to prevent rail breakage.

Maintenance: Solenoid valves are consumables and may require periodic maintenance in high-frequency operation environments.

General Safety: Follow all safety instructions, warnings, and cautions. Compatibility and safe operation are the responsibility of the equipment designer. Only trained personnel should operate the machinery. Confirm safety before servicing or removing products.