801429-SE RELIANCE

Reliance 801429-SE Relay Input Module

Brand：RELIANCE Model number：801429-SE

Country of origin: United States Product weight：0.55kg

HS code：9032899099

Product Details：

Product Dimensions：

A RELIANCE Relay Input Module is an industrial electronic component designed to convert signals from various field devices that utilize dry contact (potential-free) or energized relay contacts into a format suitable for a Programmable Logic Controller (PLC) or other control system's input. The primary function of such a module is to provide electrical isolation between the high or noisy voltages/currents of field devices and the sensitive low-voltage electronics of the control system.

Functionality:

It receives input signals from external devices, where these signals are typically in the form of a change in state of a relay contact (open or closed).
The module then conditions these signals, often converting varying voltages or currents into a standardized digital logic level (e.g., 5V DC, 24V DC) that the control system can directly process.
Crucially, the use of internal relays within the input module provides galvanic isolation, meaning there's no direct electrical connection between the field wiring and the control system's backplane. This protects the control system from voltage spikes, ground loops, and other electrical disturbances from the field.
Many models include LED indicators for each input channel to visually show the status (on/off) of the corresponding field device, aiding in troubleshooting and commissioning.

Construction:

Typically housed in a robust industrial enclosure, designed for mounting on a DIN rail or within an industrial control panel.
Features screw terminals or quick-connect terminals for easy and secure wiring of field devices.
Internal components include opto-isolators or small signal relays for isolation, conditioning circuitry, and digital logic gates.

Product Parameters (Typical)

Specific parameters can vary significantly between different models and series (e.g., Reliance AutoMate, Shark XL). The following are general characteristics:

Number of Inputs: Common configurations include 4, 8, 16, or 32 input channels per module.
Input Voltage Range:

DC Inputs: Commonly 5V DC, 12V DC, 24V DC, 48V DC.
AC Inputs: Commonly 120V AC, 230V AC.
Some modules are multi-voltage capable.

Input Current: Minimal current draw, typically in the milliampere (mA) range, required to activate the internal relay or opto-coupler.
Isolation Voltage: The dielectric strength (e.g., 1500V AC, 2500V AC) indicating the voltage difference the isolation barrier can withstand.
Response Time: The time taken for the input signal to be registered by the module, typically in milliseconds (ms).
Indicators: LED status indicators for each channel.
Mounting: DIN rail mount, panel mount.
Operating Temperature: Standard industrial range, typically -20°C to 60°C (-4°F to 140°F).
Humidity: Non-condensing, typically 5% to 95%.
Communication Interface: For modules that are part of a larger I/O system, they would connect to a backplane or network adapter using proprietary or standard industrial protocols (e.g., Modbus, Ethernet/IP if part of a modern system). For standalone "Relay in a Box" type modules, they might only have the input terminals and relay outputs.

Product Advantages

Electrical Isolation: The most significant advantage. It protects sensitive control electronics from high voltages, current surges, and electrical noise from the field. This increases the overall reliability and lifespan of the control system.
Signal Conditioning: Converts varying field signals into clear, standardized digital logic levels for the control system.
Noise Immunity: Relays provide excellent noise immunity, making them suitable for environments with significant electrical interference.
Versatility: Can interface with a wide variety of field devices, regardless of their specific output voltage or current (within the module's rating), as long as they provide a dry contact or an appropriate energized signal.
Robustness: Designed to withstand harsh industrial conditions, including temperature fluctuations, vibration, and dust.
Diagnostic Indicators: On-board LEDs simplify troubleshooting by allowing quick visual confirmation of input status.
Safety: By isolating high voltage from low voltage control circuitry, they enhance operator and equipment safety.

Important Considerations

Input Type Compatibility: Ensure the module's input type (e.g., DC voltage, AC voltage, dry contact) matches the output of your field device.
Voltage and Current Ratings: Verify that the module's voltage and current specifications align with your application to prevent damage or unreliable operation.
Channel Density: Choose a module with enough input channels for your current and future needs.
Wiring Practices: Adhere strictly to proper industrial wiring practices, including correct grounding, shielding, and cable routing, to maintain signal integrity and safety.
Response Time: For high-speed applications, consider the module's response time to ensure it can keep up with the process.
Environmental Factors: Install the module in an enclosure that protects it from excessive heat, cold, humidity, vibration, and corrosive elements, as per its specifications.
System Compatibility: If part of a larger control system, ensure the module is compatible with the specific PLC or PAC series and its communication architecture.

Product Applications

RELIANCE Relay Input Modules are widely used across various industrial and commercial sectors wherever discrete (on/off) signals from field devices need to be reliably interfaced with a control system.

Industrial Automation:

Monitoring the status of limit switches, pushbuttons, emergency stops, and proximity sensors on machinery.
Receiving feedback from motor starters, contactors, and protective relays (e.g., "motor running," "overload trip").
Interfacing with safety circuits and interlocks.

Process Control:

Monitoring level switches, pressure switches, flow switches, and temperature switches in tanks, pipes, and vessels.
Receiving status from solenoid valves and pump control circuits.

Building Automation:

Monitoring the status of door contacts, window sensors, fire alarm panels, and HVAC equipment (e.g., "fan running," "filter dirty").
Integrating with security systems for alarm inputs.

Power Generation and Distribution:

Receiving status from circuit breakers, protective relays, and switchgear.
Monitoring alarm conditions in substations.

Any application where robust, isolated digital input is required.

801429-SE RELIANCE

We have the same series of models in stock. If you don't find the model you need, please contact us and we will provide you with an official quotation！