YOKOGAWA SNB10D-425/CU2N

Description

1. Detailed parameter table

YOKOGAWA SNB10D-425/CU2N

2. Product introduction

The YOKOGAWA SNB10D-425/CU2N is a high-channel-density industrial digital input module designed for large-scale status monitoring in automation systems. Unlike the central control-focused SCP401-11 PLC, this module specializes in collecting discrete status signals from field devices, serving as a critical interface between sensors, switches, and the main control system (such as the SCP401-11).

Featuring 32 channels that support both dry and wet contacts, the SNB10D-425/CU2N can connect to a wide range of devices, including limit switches, emergency stop buttons, and relay contacts in industrial facilities. With a response time of ≤1ms, it ensures rapid detection of status changes, which is essential for timely intervention in critical processes. The module’s robust isolation design and wide operating temperature range (-20°C to 70°C) make it suitable for harsh environments in industries such as automotive manufacturing, heavy machinery, and logistics. As a key data acquisition component, the YOKOGAWA SNB10D-425/CU2N provides real-time status information to the control system, enabling quick decision-making and enhancing the safety and efficiency of industrial operations.

3. Core advantages and technical highlights

High channel density for extensive monitoring:

With 32 channels, the SNB10D-425/CU2N offers twice the channel count of many standard digital input modules. In a large warehouse automation system, it can monitor the status of 32 conveyor section sensors, 32 pallet position detectors, and 32 door interlocks—all through a few modules. This reduces the number of modules needed in the control cabinet, saving space and simplifying wiring compared to using multiple lower-channel modules, which is crucial for optimizing cabinet layout in large-scale systems.

Ultra-fast response time:

The ≤1ms response time ensures that even the quickest status changes are captured instantly. In a high-speed packaging line, it can detect when a product reaches a sealing station and send the signal to the SCP401-11 PLC, which then triggers the sealing mechanism within milliseconds. This rapid response prevents misalignment and ensures precise synchronization, reducing product waste and improving production efficiency.

Dual contact type support:

The module’s ability to handle both dry and wet contacts eliminates the need for external signal conditioning. In a manufacturing plant, it can directly connect to dry contact limit switches on machinery and wet contact sensors in washdown areas (where 24V DC is readily available) without additional adapters. This versatility simplifies system design and reduces potential points of failure, enhancing overall reliability.

Enhanced environmental resilience:

Operating reliably in -20°C to 70°C, the SNB10D-425/CU2N outperforms many modules in extreme temperatures. In an outdoor solar panel manufacturing facility, it can monitor equipment status in freezing winter conditions and hot summer heat, ensuring continuous data collection regardless of weather. Its resistance to vibration (15g peak, 10-2000Hz) also makes it suitable for installation on mobile equipment like automated guided vehicles (AGVs).

YOKOGAWA SNB10D-425/CU2N

4. Typical application scenarios

In an automotive assembly plant’s body shop, the SNB10D-425/CU2N monitors the status of 32 robotic welding guns, including whether each gun is in the home position, has completed a weld, or has a wire feed error. The module sends these status signals to the SCP401-11 PLC, which coordinates the robots’ movements to prevent collisions and ensure proper sequencing. The fast response time ensures that if a gun malfunctions, the PLC can stop the process immediately, preventing damage to the vehicle body.

In a water treatment plant, the module monitors the status of 32 valve position switches, 32 pump run/stop indicators, and 32 level switch contacts. It sends real-time data to the SCP401-11 PLC, which uses this information to control the S2BN5D-121 DO digital output modules and adjust valve positions or pump operations. The wide temperature range allows it to operate in the unheated pump rooms during winter, ensuring uninterrupted monitoring of critical equipment.

In a logistics distribution center, the SNB10D-425/CU2N tracks the status of 32 conveyor diverters, 32 barcode scanner triggers, and 32 package presence sensors. The SCP401-11 PLC uses the module’s input data to route packages to the correct destinations, with the fast response time ensuring that diverters switch positions quickly enough for high-speed package flow. The high channel density simplifies the connection of numerous sensors throughout the large facility, reducing installation complexity.

5. Related model recommendations

• SNB10D-212/CU2N: A 16-channel variant of the SNB10D-425/CU2Nfor smaller systems, offering the same performance but with fewer channels for cost optimization.
• SCP401-11: The central PLC that processes the data from the SNB10D-425/CU2N, using the input signals to execute control logic and coordinate with output modules.
• S2BN5D-121 DO: The digital output module that acts on the control decisions from the SCP401-11, which are based on the input data from the SNB10D-425/CU2N.
• PW482-10 S2: The dual-input power supply that provides stable 24V DC to the SNB10D-425/CU2N, ensuring reliable operation even in fluctuating power conditions.
• SAI533-H33: The analog input module that can be used alongside the SNB10D-425/CU2Nto provide a comprehensive data acquisition solution, combining discrete and continuous signal monitoring.
• F3PU50-0N: The HMI panel that displays the status of the SNB10D-425/CU2N‘s input channels, allowing operators to visualize equipment status and diagnose issues.

6. Installation, commissioning and maintenance instructions

Installation preparation

Before installing the SNB10D-425/CU2N, ensure the mounting rail is securely fastened in a control cabinet with ambient temperature between -20°C and 70°C. Prepare tools including a torque screwdriver (0.5-1.5Nm), wire strippers, and a multimeter.

Verify that the 24V DC power supply (from PW482-10 S2) is within the ±10% tolerance range. Use 18-22 AWG shielded cables for all input connections, with the shield grounded at the module end to minimize electromagnetic interference. For wet contact inputs, ensure proper polarity when connecting to the 24V DC supply, and for dry contacts, connect the signal wires directly to the input terminals. Label each channel clearly to correspond with the connected device, simplifying troubleshooting.

Maintenance suggestions

Perform quarterly visual inspections of the SNB10D-425/CU2N to check for loose connections, dust accumulation, or signs of corrosion on the terminals. Clean the module’s surface with a dry, lint-free cloth if necessary, taking care not to disturb the wiring. Test each input channel semi-annually by manually activating the connected device and verifying that the status is correctly reflected in the SCP401-11 PLC’s monitoring software.

Monitor the module’s status indicators: a steady green LED indicates normal operation, while a red LED signals a fault (e.g., overvoltage, backplane communication error). Use the PLC’s diagnostic tools to identify specific faulty channels, which may indicate a problem with the connected device or wiring rather than the module itself.

When replacing the SNB10D-425/CU2N, transfer the wiring to the new module and verify that all channels function correctly by testing each connected device. Store spare modules in anti-static packaging in a dry environment (10-60% RH) to prevent damage to sensitive components.

7. Service and guarantee commitment

YOKOGAWA provides a 5-year warranty for the SNB10D-425/CU2N, ensuring reliable performance in industrial applications. Each module undergoes rigorous testing, including temperature cycling (-20°C to 70°C), vibration testing, and isolation resistance verification, to meet strict industrial standards.

Our technical support team offers 24/7 assistance for installation, configuration, and troubleshooting, with specialists experienced in digital input systems. On-site support is available in major industrial regions with a 48-hour response time for non-critical issues, ensuring minimal downtime in case of problems.

YOKOGAWA provides detailed wiring diagrams and application notes specific to the SNB10D-425/CU2N, helping customers integrate it effectively with the SCP401-11 PLC and other system components. Training programs cover module maintenance, troubleshooting, and integration best practices, ensuring customers can maximize the performance and lifespan of the module in their automation systems.