Description
Key Technical Specifications
- Core Function: Records changes in digital input signals with accurate time-stamping to realize sequence of events tracking, which helps technicians trace the cause of system abnormalities.
- Input Channels: 32 digital input channels, capable of simultaneously collecting and recording digital signals from multiple field devices.
- Input Voltage: 24VDC, matching the common power supply standard for industrial field sensors and switches.
- Environmental Adaptability: Operating temperature ranges from 0°C to +60°C, and storage temperature from -40°C to +85°C; it can operate stably in an environment with 5%-95% relative humidity without condensation. The conformal coating on the circuit board can resist the corrosion of moisture and most chemical gases, improving reliability in harsh industrial environments.
- Physical Dimensions & Weight: Measures 450mm×45mm×150mm and weighs 0.3 lbs, featuring a compact design that saves space in control cabinets.
- Certifications: Has passed UL 508, CSA, and TUV certifications, meeting strict safety and quality standards for industrial control components.
- Warranty: Generally comes with a 12-month warranty when purchased new.
Honeywell 51402625-176
Field Application & Problem Solved
In complex industrial sites such as chemical plants, power stations, and oil refineries, UCN systems are widely used as the core communication network for process control. A major pain point in such scenarios is the difficulty of quickly locating the root cause when equipment malfunctions or process anomalies occur—traditional modules often fail to record the exact timing and sequence of signal changes.
The 51402625-176 solves this problem by precisely time-stamping each digital input change. For example, in a chemical reaction workshop, if a reactor’s safety valve trips unexpectedly, the module can record the sequence of signals such as pressure switch triggers and valve position changes before the trip. This allows technicians to quickly determine whether the trip was caused by abnormal pressure or a faulty valve feedback signal. Additionally, its compatibility with the UCN network ensures seamless integration with the overall control system, enabling real-time transmission of event data to the central control platform without additional communication conversion devices. Its conformal coating also makes it suitable for use in humid or chemical gas-prone environments such as coastal power plants and chemical workshops.
Installation & Maintenance Pitfalls (Expert Tips)
- Distinguish from Similar Model to Avoid Misconfiguration: It is highly similar to the 51402625-175 module. Although both are used in the MC-PD IS 12 system, they are different version models. Do not directly use the configuration parameters of 51402625-175 for this module. Otherwise, it may lead to incompatible communication with the UCN network. Confirm the module model in the system configuration software first during installation.
- Ensure Stable UCN Network Connection: As a UCN-compatible module, its communication stability depends on the network connection. When wiring, ensure the tightness of the UCN bus connection terminals. Avoid parallel routing with high-voltage cables, as electromagnetic interference may cause delays in event data transmission. It is recommended to use shielded cables for UCN bus wiring and ground the shield layer.
- Avoid Damaging the Conformal Coating: The conformal coating on the module’s circuit board is crucial for corrosion resistance. During maintenance, do not use sharp tools to scrape the board surface, and avoid cleaning it with corrosive solvents such as strong acids and alkalis. Use a dry and clean brush to remove dust to prevent damage to the coating and loss of corrosion protection.
- Verify Voltage Stability Before Power-On: The module uses a 24VDC power supply. Before power-on, use a multimeter to check whether the input voltage is within the stable range of 24VDC. Fluctuations or overvoltage may burn out the internal circuit. It is advisable to configure a voltage-stabilized power supply for the module to ensure stable operation during long-term use.
Honeywell 51402625-176
Technical Deep Dive & Overview
The core advantage of the Honeywell 51402625-176 lies in its precise SOE recording capability, which fills the gap of unclear event sequencing in traditional digital input modules. Its internal circuit is designed with high-precision timers, ensuring that each input signal change is marked with an accurate time stamp. This is critical for analyzing chain reactions in industrial processes. The module’s conformal coating is a key design for harsh environments—it forms a thin protective film on the circuit board to isolate moisture and chemical gases, effectively reducing the risk of circuit failure due to corrosion.
In terms of system integration, it perfectly adapts to Honeywell’s UCN network. The UCN network, with a data transmission rate of up to 5 Mbps, can quickly transmit the recorded event sequence data to the central controller. This enables real-time monitoring of the production process. Moreover, its compact size allows for flexible installation in standard control cabinets, and its compliance with multiple international industrial certifications means it can be applied in various industrial fields worldwide without compatibility issues with regional safety standards.
Overall, this module is a key component for ensuring the traceability of industrial control systems. It provides reliable data support for process optimization and fault handling, and is a cost-effective choice for maintaining the stable operation of UCN-based industrial automation systems.
