ABB 1SNA031805R1200 BNMS T230V-1 Input Optocoupler Module

ABB 1SNA031805R1200 is an input optocoupler plug module identified as BNMS T230V-1 and designed for 230 V AC input applications. The component belongs to the ABB interface relay and optocoupler accessory range and is intended to provide electrical isolation between an input control circuit and the associated interface system. Its compact plug-in construction allows it to be incorporated into compatible interface relay assemblies used in industrial automation and electrical control applications.

ABB documentation identifies 1SNA031805R1200 specifically as the BNMS T230V-1 input optocoupler plug for 230 V AC. The same ABB technical documentation lists corresponding BNMS modules for other voltage levels, including 24 V AC, 48 V AC and 115 V AC, making the 230 V AC version identifiable by its complete part number and T230V-1 designation. :contentReference[oaicite:1]{index=1}

Product Overview

The primary purpose of ABB 1SNA031805R1200 is signal interfacing through optical isolation. An optocoupler transfers an electrical signal between two circuits by using an optical transmission path rather than a direct conductive connection. This arrangement helps separate the input side from the output side while allowing the signal state to be communicated to the connected interface relay or control circuit.

The BNMS T230V-1 is specifically associated with a 230 V AC input. ABB interface relay documentation places this module within the BNMS input optocoupler family. The product is therefore not simply a general terminal component; it is a dedicated plug-in interface element intended for compatible ABB interface relay assemblies.

The complete ordering reference, 1SNA031805R1200, is important when selecting the correct module because the BNMS family contains several versions with different input voltage ranges.

Technical Specifications

• Manufacturer: ABB
• Part number: 1SNA031805R1200
• Product type: Input optocoupler plug module
• Product designation: BNMS T230V-1
• Application voltage: 230 V AC
• Input voltage range: 195.5 to 253 V AC
• Maximum input current: 2 mA
• Typical triggering threshold at rated input current: 95 V AC
• Typical switching time: 6 ms / 10 ms
• Output maximum voltage/current: 58 V / 30 mA
• Input/output isolation: Up to 2.5 kV
• Technology: Optical isolation
• Product family: BNMS interface modules
• Application category: Interface relay and optocoupler systems

ABB’s interface relay documentation specifies the electrical characteristics of the BNMS T230V-1 module. The stated input voltage range is 195.5 to 253 V AC, corresponding to a nominal 230 V AC application. The documentation gives a maximum input current of 2 mA and a typical triggering threshold of 95 V AC at the specified input condition. :contentReference[oaicite:2]{index=2}

The same documentation specifies an output maximum of 58 V and 30 mA, together with input/output isolation up to 2.5 kV. These values describe the optocoupler interface characteristics and should be considered when designing or verifying the surrounding electrical circuit. :contentReference[oaicite:3]{index=3}

230 V AC Input Function

The T230V-1 designation identifies the module as the 230 V AC input variant within the BNMS family. The input circuit is intended to receive an AC control signal within the specified voltage range. When the input signal reaches the required triggering condition, the optical interface transfers the corresponding state to the isolated output side.

This configuration is useful in control systems where a higher-voltage AC field signal needs to be interfaced with a lower-voltage or electrically separated electronic control circuit. Instead of connecting the two circuits directly, the optocoupler provides a defined isolation barrier.

The 230 V AC capability distinguishes 1SNA031805R1200 from other BNMS input modules designed for lower AC voltages. Selecting the correct voltage variant is therefore essential for proper circuit operation.

Optical Isolation Principle

An optocoupler uses a light-emitting element and a light-sensitive receiving element to transfer information across an isolation barrier. The input electrical signal controls the optical element, while the receiving element responds to the generated optical signal on the isolated side.

This operating principle provides galvanic separation between the input and output circuits. In industrial automation systems, such isolation can help prevent the direct transfer of electrical potential differences and reduce the influence of disturbances between connected circuits.

ABB 1SNA031805R1200 is therefore suited to applications where an AC field signal must be coupled to an interface relay architecture while maintaining the specified input/output isolation.

BNMS Interface Module Family

The BNMS series includes multiple input optocoupler modules covering different control voltages. ABB’s selection documentation lists BNMS T24V-1, BNMS T48V-1, BNMS T115V-1 and BNMS T230V-1 for different AC input levels. The corresponding references include 1SNA031802R1700, 1SNA031803R1000, 1SNA031804R1100 and 1SNA031805R1200 respectively. :contentReference[oaicite:4]{index=4}

This family structure provides a straightforward way to select an interface module according to the available field signal. The 1SNA031805R1200 version is specifically associated with 230 V AC input operation.

When replacing or configuring a BNMS module, the input voltage should be checked against the electrical circuit rather than selecting a module only because its physical form is similar to another version.

Interface Relay Applications

Interface relays are commonly used between field devices and control systems to provide signal conversion, isolation and switching functions. The BNMS optocoupler modules form part of this interface architecture by providing a suitable optical input stage.

ABB 1SNA031805R1200 can therefore be applied where a 230 V AC control signal must be interfaced with compatible ABB equipment. Possible applications include industrial control cabinets, machine control panels, process automation systems and electrical interface assemblies.

The exact application depends on the compatible base or interface relay system, wiring configuration and electrical characteristics of the connected field device.

Electrical Isolation

One of the important characteristics of ABB 1SNA031805R1200 is its specified input/output isolation. ABB documentation gives an isolation value of up to 2.5 kV for the BNMS optocoupler modules. :contentReference[oaicite:5]{index=5}

Isolation is particularly useful when field-level circuits operate at a different electrical potential from the electronic control system. It can help maintain separation between the signal source and the receiving circuit while still allowing the control information to pass through the interface.

The specified isolation rating should not be interpreted independently of the complete installation. Wiring, enclosure design, environmental conditions and the surrounding circuit all influence the overall insulation performance of an industrial control system.

Input and Output Characteristics

The 230 V AC input side of the BNMS T230V-1 is designed for a nominal 230 V AC control signal. ABB specifies an operating input range of 195.5 to 253 V AC. The maximum input current is 2 mA, while the typical triggering threshold is stated as 95 V AC under the specified test condition. :contentReference[oaicite:6]{index=6}

On the output side, ABB specifies a maximum voltage and current of 58 V and 30 mA. The output is intended as an interface signal rather than as a high-power switching output. This distinction is important when determining what type of downstream circuit can be connected.

The switching time information provided by ABB is approximately 6 ms / 10 ms. Actual system response can also depend on the connected circuit and the operating conditions of the complete interface arrangement.

Industrial Automation Integration

ABB 1SNA031805R1200 can be incorporated into industrial automation systems where electrical signals from field equipment must be transferred to control or interface circuits. The optical isolation provided by the module makes it suitable for applications that require electrical separation between signal circuits.

Typical system-level uses can include control panels, machine automation equipment, process control cabinets and interface assemblies. The module can form part of a signal path between a 230 V AC field signal and an electrically isolated control circuit.

Because the BNMS T230V-1 is a specific interface component, compatibility with the associated interface relay or base should be confirmed before installation.

Product Identification

The primary identification reference for this component is ABB 1SNA031805R1200. ABB technical documentation associates this part number with BNMS T230V-1, the 230 V AC input optocoupler plug module. :contentReference[oaicite:7]{index=7}

Some product databases describe the same reference using the designation BNMS T230VAC-1. The difference in notation does not change the underlying ABB ordering reference. For technical documentation, procurement records and equipment identification, the complete part number should remain the principal reference.

The related family references are also useful when distinguishing this module from other voltage versions. For example, ABB lists separate part numbers for 24 V AC, 48 V AC and 115 V AC BNMS input modules.

Installation Considerations

The BNMS T230V-1 is a plug-in interface module and should be installed only in the compatible interface system specified for the product family. The electrical circuit should be de-energized and verified according to the applicable safety procedures before installation or removal.

The input voltage must remain within the specified range. Applying an unsuitable voltage variant can result in incorrect switching behavior or component damage. The output circuit should also remain within the specified maximum voltage and current characteristics.

For industrial installations, the complete interface assembly should be evaluated according to the applicable electrical standards, enclosure requirements and control system design.

Related ABB Interface Components

The BNMS T230V-1 belongs to a broader ABB interface relay and optocoupler product family. ABB documentation lists different optical modules according to their input or output function and voltage range. These components allow engineers to select an interface according to the electrical characteristics of the field signal.

The 1SNA031805R1200 reference should not be confused with BNMS modules designed for 24 V AC, 48 V AC or 115 V AC. Although the modules belong to the same product family, their electrical input specifications are different.

Accurate part-number identification is therefore particularly important when maintaining an existing interface system or preparing an electrical control panel design.

Typical Applications

ABB 1SNA031805R1200 can be used in applications such as:

• 230 V AC field signal interfacing
• Industrial automation control panels
• Interface relay systems
• Electrical signal isolation
• Machine control circuits
• Process automation systems
• Industrial electrical cabinets
• AC control signal conversion interfaces
• PLC-related interface circuits
• Control and monitoring signal paths

The module’s specific role depends on the complete interface assembly and the electrical architecture of the application. It should be selected according to the actual input voltage and compatible ABB interface equipment.

Conclusion

ABB 1SNA031805R1200 is the BNMS T230V-1 input optocoupler plug module designed for 230 V AC applications. ABB documentation identifies it as part of the BNMS optical interface module family and specifies an input range of 195.5 to 253 V AC, a maximum input current of 2 mA, a maximum output rating of 58 V and 30 mA, and input/output isolation up to 2.5 kV. :contentReference[oaicite:8]{index=8}

The module provides an optical isolation interface between the 230 V AC input circuit and the associated output circuit. Its function makes it suitable for industrial automation interface systems where field signals need to be electrically separated from control or relay circuits.

For accurate identification, ABB 1SNA031805R1200 should be referenced together with its BNMS T230V-1 designation. The complete electrical configuration and compatible interface assembly should be checked before integration to ensure that the 230 V AC input characteristics, output limits and isolation requirements correspond to the intended application.