FOXBORO L0130AD L0130AE-0H Digital Input Module

FOXBORO L0130AD L0130AE-0H Digital Input Module

Product Overview

The FOXBORO L0130AD L0130AE-0H digital input module is a high-precision signal acquisition unit developed by FOXBORO specifically for industrial automation control systems. It consists of the L0130AD main module and the L0130AE-0H signal adaptation submodule, and is a core front-end component of the FOXBORO I/A Series distributed control system. This module has the core function of precise acquisition of digital signals, specifically designed to receive discrete signals from industrial field equipment (such as switch status, start stop signals, fault alarm signals, etc.), which are then converted into standard digital signals through photoelectric isolation and noise filtering and transmitted to the upper control system, providing reliable data support for status monitoring and logic interlocking in the production process.

The combination architecture of "main module+submodule" realizes flexible separation of signal acquisition and adaptation. L0130AE-0H can quickly switch adaptation modes according to the on-site signal type (NPN/PNP), while L0130AD is responsible for signal processing and communication transmission, and can adapt to different scenarios without replacing the overall module. The product is widely used in industries such as petrochemicals, power generation, metallurgy and steel, and automobile manufacturing. It can seamlessly integrate with the FOXBORO I/A Series DCS system and is compatible with third-party PLC and SCADA equipment. It is a key component for discrete signal monitoring in industrial production.

Specification parameters

Module splitting parameters

L0130AD main module: 16 channels (dual group 8 channels); Communication interface: FOXBORO proprietary bus; Power supply voltage: 5V DC (provided by the system backplane); Data update cycle: ≤ 1ms; equipped with channel level fault diagnosis function

L0130AE-0H submodule: Signal type: NPN/PNP compatible (software configuration); Input voltage range: DC 10-30V; Input current: 2-10mA (active state); Response time: ≤ 10 μ s; Support switching between dry and wet contact inputs

Input characteristics

High level threshold: ≥ 7.5V DC; Low level threshold: ≤ 2V DC; Open circuit detection threshold: ≤ 1V DC; Input impedance: ≥ 10k Ω; supports channel grouping isolation (8 independent isolation channels per group)

Anti-interference performance

Common mode rejection ratio (CMRR): ≥ 150dB@50 /60Hz; Differential Mode Rejection Ratio (DMRR): ≥ 120dB@50 /60Hz; Surge protection: ± 2kV (IEC 61000-4-5); Electrostatic protection: ± 8kV (contact discharge), ± 15kV (air discharge)

Power supply and power consumption

Main power supply: DC 24V ± 10% (external auxiliary); Backboard power supply: DC 5V ± 5% (provided by the system); Single module power consumption: ≤ 3W (when 16 channels are fully activated)

environmental conditions

Working temperature: 0 ° C to 60 ° C; Storage temperature: -40 ° C to 85 ° C; Relative humidity: 5% -95% (no condensation); Protection level: IP20 (module level), IP65 (with protective casing)

Security and Authentication

Safety level: SIL 2; Isolation voltage: 2.5kVrms/1min between input output power supply; Certification standards: UL 508, CSA C22.2 No.14, IEC 61131-2, CE

physical parameters

Installation method: Installation of system backplane guide rail; Dimensions (length x width x height): 160mm x 80mm x 30mm; Weight: approximately 180g; Indicator lights: 16 channel status lights+1 power light+1 fault light

Performance characteristics

1. High reliability signal acquisition and adaptation

The L0130AE-0H submodule adopts a software configurable design, and can switch between NPN/PNP signal types through FOXBORO configuration software without changing hardware wiring, adapting to the signal output modes of different brands of sensors. The 16 channels are divided into two independent isolation groups, each with independent power and signal circuits to avoid interference between channels. They also support switching between dry contacts (passive) and wet contacts (active) inputs, and are compatible with various on-site devices such as mechanical switches and proximity switches.

2. Ultra high speed response and real-time data transmission

The response time of the module input signal is as low as 10 μ s, which can accurately capture the state changes of high-speed equipment (such as the on/off signals of high-speed solenoid valves), avoiding signal leakage or delay. The L0130AD main module communicates with the upper system through the FOXBORO dedicated backplane bus, with a data update cycle of ≤ 1ms, ensuring that the on-site signal status can be fed back to the control system in real time, providing time guarantee for fast logic interlocking and fault handling.

3. Industrial grade anti-interference and isolation design

The entire module adopts a three-level optoelectronic isolation design of "channel group system", with an isolation voltage of 2.5kVrms between input and output, effectively blocking the propagation path of grounding loop and electromagnetic interference. Combined with EMC electromagnetic compatibility circuit and surge protection design, it can resist strong electromagnetic radiation and power grid surge impact generated by industrial field frequency converters and high-power motors, and maintain signal stability in complex interference environments with an error rate of less than 1 × 10 ⁻.

4. Flexible compatibility and system integration features

Perfectly compatible with FOXBORO I/A Series distributed control system, it can be directly plugged into the system standard rack and seamlessly integrated with power supply and communication through the backplane bus, without the need for additional communication modules. At the same time, it supports converting to Modbus TCP protocol through a gateway and interfacing with third-party PLCs and SCADA systems (such as Siemens WinCC and Rockwell FactoryTalk) to meet the automation upgrade needs of new and old factories.

5. Channel level fault diagnosis and operational convenience

The module has a comprehensive channel level self diagnostic function, which can monitor the input signal status, line continuity, and isolation circuit integrity of each channel in real time. When an open circuit, short circuit, or signal abnormality occurs, it immediately prompts locally through the channel status light (red/green dual color) and sends a fault code containing the channel number to the upper system. The main module integrates a fault summary indicator light, which facilitates operation and maintenance personnel to quickly locate the problem channel and shorten the troubleshooting time.

6. Low power consumption and wide voltage adaptation

The optimized circuit design ensures that the power consumption of the module remains ≤ 3W even when all 16 channels are fully activated, effectively reducing the overall energy consumption of the system. The L0130AE-0H submodule supports a wide range of DC 10-30V input and can directly adapt to common 12V and 24V DC power supplies in industrial sites without the need for additional power converters, simplifying on-site wiring and power supply design.

Working principle

The FOXBORO L0130AD L0130AE-0H digital input module has the core workflow of "signal access isolation conditioning state judgment data transmission", and achieves precise acquisition and reliable transmission of discrete signals through the cooperation of the main module and sub modules. The specific principle is as follows:

1. Signal access and adaptation stage

The digital signals (NPN/PNP or dry contact signals) output by on-site equipment (such as proximity switches and limit switches) are connected to the L0130AE-0H submodule through terminals. The submodule switches the internal adaptation circuit according to the preset configuration (software settings): for active signals, the input current and voltage are limited by current limiting resistors and clamping diodes to prevent damage caused by overcurrent and overvoltage; For passive dry contact signals, automatically activate internal pull-up/pull-down resistors to form a loop, ensuring effective signal acquisition.

2. Isolation and noise filtering stage

The connected signal first enters the optoelectronic isolation unit, which achieves electrical isolation between the input circuit and the internal processing circuit through an optocoupler, blocking the propagation of external interference signals. Subsequently, through RC filtering circuit and Schmitt trigger processing, high-frequency noise and signal jitter are filtered out, and irregular input signals are shaped into standard square wave signals to ensure the accuracy of signal state judgment. Two sets of 8-channel channels use independent isolated power supplies and filtering circuits to avoid cross interference between channels.

3. Signal status judgment and digitalization stage

The conditioned signal is transmitted to the signal detection unit of the L0130AD main module, and the high-speed comparator compares the signal voltage with the preset threshold (high level ≥ 7.5V, low level ≤ 2V) to determine whether the signal status is "1" (high level, device activated) or "0" (low level, device not activated). At the same time, the detection unit monitors the input current of the channel in real time. When the current is ≤ 0.5mA, it is determined that the line is open and generates an open circuit fault signal. The judgment result is temporarily stored in the data register in the form of digital levels.

4. Data transmission and fault feedback stage

The communication control unit of the main module reads 16 channel status data from the data register according to the system set update cycle (≤ 1ms), and transmits it to the upper controller through the FOXBORO dedicated backplane bus. At the same time, the fault diagnosis unit conducts real-time inspections of the isolation circuit, power supply voltage, and signal integrity of each channel. When abnormalities are detected, the fault information is packaged with the channel number, synchronously uploaded through the communication bus, and the corresponding channel status indicator light is driven to switch to a red alarm state.

5. Power supply and system coordination stage

The module obtains 5V DC working power through the system backplane to supply power to the internal logic circuit and communication unit; The external auxiliary 24V DC power supply provides energy for the photoelectric isolation unit and input adaptation circuit, achieving independent supply of isolation power and working power. The main module receives configuration instructions (such as signal type and threshold adjustment) issued by the upper system through the bus, updates internal parameters in real time, and ensures the collaborative work between the module and the system.