XYCOM 81987-001A1805 Product Detailed Report

I. Product Overview

XYCOM 81987-001A1805 is an industrial-grade VME bus I/O control board card under the 81987 series of the American XYCOM Automation Company. It is a standard signal acquisition and data preprocessing PCB board card, featuring high integration, stable signal transmission, universal compatibility, and basic reinforcement protection. Model disassembly: "81987" is the series code, "001" is the initial basic version, "A" represents the standard industrial-grade version, and "1805" is the substrate specification code (size and layer definition). This board card is specifically designed for VME bus industrial control systems, embedded control units, and on-site signal acquisition and data forwarding scenarios, undertaking multi-channel analog/digital signal acquisition, signal conditioning, photoelectric isolation, bus communication adaptation, and basic power supply management functions. It is widely compatible with XYCOM XVME series enclosures, industrial PCs, HMI panels, and third-party compatible industrial control devices, and is a core general-purpose I/O board card in manufacturing, process control, building automation, and other conventional working conditions.

II. Manufacturer Background

XYCOM (Xycom Automation) is headquartered in the United States and has over 35 years of experience in industrial-grade computing and control hardware research and manufacturing. It is one of the leading suppliers of industrial PCs, rugged HMI, VME bus modules, and specialized board cards in the world. The company focuses on high-reliability control solutions in harsh environments, with products covering industrial automation, process control, intelligent manufacturing, rail transportation, energy and power, etc. It is renowned for its wide temperature range, anti-vibration, strong EMI/EMC performance, and long lifecycle. It supports 7×24-hour continuous operation and is suitable for extreme temperature, dust, oil contamination, and strong electromagnetic interference sites. Its global cumulative installation volume exceeds 200,000 units, and it has deep technical accumulation and market reputation in the general industrial control and rugged hardware fields.

III. Core Specifications and Technical Parameters

(1) Hardware Architecture and Materials

It adopts industrial-grade high Tg multi-layer PCB, flame-retardant base material (UL94 V-0 grade), board surface coated with standard three-proof coating (anti-humidity, dust-proof, salt fog-proof), gold fingers with gold plating (thickness ≥ 5μm), anti-oxidation, and anti-plugging; board size follows VME standard 6U specification (233.4mm×160mm), compatible with standard VME chassis rails installation; uses lead-free wave soldering + selective wave soldering process, key solder joints are reinforced for vibration and impact resistance, meeting MIL-STD-810 basic-level standards, capable of withstanding industrial site regular vibration (5–200Hz, 0.1g²/Hz) and slight impact (10g, 11ms), structural strength meets general working condition requirements.

(2) Electrical Characteristics

Operating voltage: 24V DC industrial standard input, supports ±15% fluctuation adaptation, integrated reverse connection protection, overvoltage (36V)/overcurrent (3A)/surge (2kV) protection circuits, compatible with unstable power supply scenarios in industrial sites.

Power consumption: Low power consumption design, static power consumption ≤ 3.5W, full-load power consumption ≤ 8W, no need for additional heat dissipation modules, compatible with long-term continuous operation.

Operating temperature: Industrial standard wide temperature - 40℃ to + 75℃, compatible with conventional industrial workshops, indoor cabinets, and general outdoor shaded scenarios, meeting the temperature requirements of most non-extreme working conditions.

Insulation and Voltage Resistance: Line-to-line insulation resistance ≥ 200MΩ, withstand voltage ≥ 3000V AC/1min, meets high-voltage protection requirements, effectively preventing leakage and short-circuit risks. Electromagnetic Compatibility: On-board multi-stage EMI filtering circuit + shielding grounding design, compliant with EN 61000-6-2 (industrial environment anti-interference), EN 61000-6-4 (industrial environment emission) standards, capable of resisting electromagnetic interference generated by motors, frequency converters, relays, etc., with stable signals suitable for medium to strong interference environments.

(III) Function Interface Configuration

Bus Interface: Integrated VMEbus slave interface (IEEE 1014 standard), supports A16/D16 data transmission, maximum transmission rate 10MB/s, compatible with XYCOM XVME-212/540/957 etc. VME chassis, compatible with VME64 expansion protocol.

Industrial Communication: Equipped with a single RS-485 serial port (supports Modbus RTU) + 1 dedicated I/O expansion bus, realizes data interaction with PLC, upper computer, HMI and field instruments, RS-485 supports long-distance communication (maximum 1200m), compatible with distributed I/O networking.

I/O Channels:

Analog: 8 isolated analog input channels, compatible with 0–10V, ±10V, 4–20mA standard signals, sampling accuracy ±0.1% FS, sampling rate 100Hz/channel, supports single-ended/differential input switching.

Digital: 16 isolated digital input channels (24V DC, current sinking/current sourcing selectable), 8 relay outputs (contact capacity 24V DC/5A, 250V AC/3A), compatible with sensors, buttons, solenoids, indicator lights, etc. loads.

Expansion and Debugging: Reserved 1 I/O expansion slot (can be added with analog/digital expansion modules), JTAG debugging port, RS-232 maintenance serial port and dual-color status indicator lights (power, operation, fault, communication), clear layout, convenient for on-site diagnosis and maintenance.

(IV) Reliability Design

Component Screening: Core chips (CPU, ADC, optocoupler) use industrial-grade wide-temperature models, undergo 100% aging test (85℃, 48 hours), resistant to high temperatures and aging.

Isolation Protection: All analog/digital channels are fully optically isolated (isolating voltage 2500V AC), completely cutting off the transmission path of on-site interference signals, protecting the board and downstream equipment.

Power Failure Protection: On-board non-volatile memory (NV-RAM), can save key parameters and status data after power failure, with a retention time of ≥10 years, no need for backup batteries.

IV. Core Function Features

(1) Standard A Version Design, High Stability for General Conditions

As the core advantage of "A" version, standard reinforced protection, full-channel optical isolation, wide-temperature operation, in normal industrial conditions, stability is outstanding, can adapt to medium to strong electromagnetic interference, temperature fluctuations, mild dust environment, no additional protective measures are required, significantly reducing deployment costs, is the most versatile and reliable basic model in the 81987 series.

(2) 001 Initial Basic Version, Simple and Efficient Easy Maintenance

As the initial version of the series, the circuit layout is simple, the function focuses on I/O acquisition and communication, the standardization degree of components is high, reducing redundant design, reducing failure rate; standardized interfaces and common components, fault can be quickly located and replaced, maintenance cost is low, compatible with long-term continuous operation of conventional production lines and monitoring systems.

(3) 8-channel high-precision analog quantity acquisition, compatible with multiple types of sensors 8-channel isolated analog input, compatible with both voltage and current signal types, ±0.1% high-precision sampling + 100Hz high-speed acquisition, capable of accurately collecting sensor signals such as temperature, pressure, flow, level, displacement, etc.; single-ended/differential input switching, adaptable to different sensor wiring methods, highly flexible, meeting the precision requirements of conventional process control data acquisition.

(4) Strong anti-interference and wide temperature operation, suitable for complex industrial environments

Multi-level EMI filtering, full-channel optocoupling isolation, wide temperature (-40℃ to +75℃) design, can resist industrial site electromagnetic interference, temperature fluctuations, voltage instability, etc., MTBF ≥ 120,000 hours, supports 7×24-hour continuous operation, reduces the risk of failure shutdown, suitable for complex industrial conditions such as manufacturing, energy, water treatment, etc.

(5) Seamless compatibility with VME bus, easy integration and replacement

Fully compatible with VMEbus standard, can seamlessly adapt to XYCOM XVME series chassis, industrial PCs, and third-party VME devices; can directly replace the old version boards of the same series (such as 81987-001B), no need to modify system configuration and programs, plug-and-play, suitable for upgrading old systems, reducing upgrade costs.

Five, Typical Application Scenarios

(1) Process control and monitoring system

Used in process control scenarios such as chemical, water treatment, pharmaceuticals, food and beverage, as the core I/O acquisition board card, collecting analog signals such as temperature, pressure, flow, level, pH value, etc., while monitoring the on/off status of pumps, valves, motors, etc. (digital quantity), uploading to the control system via VME bus to achieve closed-loop control of process parameters, over-limit alarm and data recording, suitable for continuous production and high-stability requirements.

(2) Manufacturing production line control

Adapted to regular production lines such as automotive parts, electronic assembly, light industry manufacturing, etc., realizing sensor signal acquisition, conveyor belt/motor start-stop control, production status monitoring, abnormal alarm functions; wide temperature and anti-interference design, suitable for temperature fluctuations in workshops, motor frequency converter interference environment, ensuring continuous and efficient operation of the production line.

(3) Building automation and infrastructure monitoring

Used in commercial buildings, factory parks, municipal facilities, etc. building automation systems, collecting operating parameters and status signals of air conditioners, water supply and drainage, lighting, elevators, etc., achieving automatic control of equipment, energy consumption monitoring and remote management; low power consumption, stable operation characteristics, suitable for long-term indoor monitoring scenarios, reducing operation and maintenance energy consumption.

(4) VME bus embedded control system

Integrated into XYCOM XVME series VME chassis, as an embedded control slave board card, suitable for small industrial robots, intelligent devices, dedicated control devices, etc., undertaking I/O signal processing, bus data forwarding, equipment logic control functions; compact 6U specification, saves chassis space, suitable for embedded installation inside equipment.

(5) Industrial data acquisition and edge terminal

As the core board of the edge acquisition terminal, collecting data from on-site sensors, instruments, equipment operation, through RS-485 or VME bus uploading to SCADA/cloud platform, achieving remote monitoring, data storage analysis and production report generation; suitable for basic data acquisition of intelligent factories, energy management, environmental monitoring, etc., stable and reliable, easy to deploy.

Six, Product Advantages and Value

(1) Performance advantages

Compared with ordinary commercial I/O board cards, four advantages are prominent: wide temperature operation, full-channel isolation, strong anti-interference, high-precision acquisition; compared with the same series high-end version, simple design, low power consumption, high cost performance, easy maintenance, no performance redundancy, suitable for precise scenarios, optimal balance of stability and cost.

(2) Cost value Standard Version A design, with a lower procurement cost compared to the high-performance versions of the same series; low power consumption (full load ≤ 8W) reduces long-term energy consumption costs; standardized components and simple circuits reduce maintenance and replacement costs; strong compatibility reduces system integration and renovation debugging costs, and offers high long-term usage value.

(III) Ecological Value

Relying on the complete industrial automation ecosystem of XYCOM, it can be seamlessly linked with brand VME chassis, industrial PCs, and HMI, compatible with mainstream industrial protocols such as Modbus RTU and VMEbus, reducing the difficulty of system development, integration, and maintenance; long lifecycle support (XYCOM provides 10 years or more spare parts guarantee), ensuring the long-term stable operation of industrial systems, and meeting the upgrade needs of intelligent manufacturing infrastructure.

VII. Installation and Usage Precautions

(1) Installation Environment

Install in a ventilated, dry, non-corrosive gas-free, and non-vibrating standard VME industrial chassis, with the environmental temperature controlled at -40℃ to +75℃, humidity 5%–95% (no condensation); keep away from high-frequency furnaces, large-power frequency converters, relay cabinets, etc., with a distance of ≥30cm; avoid dust accumulation, regularly clean the surface dust of the board cards with dry compressed air, and prohibit the use of liquid cleaners.

(2) Power Supply Specifications

Use a 24V DC industrial-grade regulated power supply, with voltage fluctuation controlled within ±15%, ripple ≤ 100mV; use shielded twisted-pair cables (cable diameter ≥ 1.5mm²), single-ended grounding of the shielding layer; do not share the power circuit with large-power inductive loads (motors, frequency converters), to reduce interference; the power interface needs to be tightened to prevent vibration-induced poor contact, and do not use live insertion or removal of power connectors.

(3) Wiring Specifications

Analog signal wiring: use shielded twisted-pair cables (single-ended grounding) for voltage signals, two-core shielded wires for current signals, pay attention to the positive and negative polarity of differential signals, ensure firm connection, and avoid false connection.

Digital signal wiring: input signals connect to the positive/negative pole of 24V DC (select according to current injection/drawing), the load of output relay contacts must not exceed the rated capacity (24V DC/5A, 250V AC/3A), to avoid contact burnout.

Communication wiring: RS-485 interface uses dedicated shielded twisted-pair cables, clearly distinguish A/B lines, and connect the terminal resistor (120Ω) as needed; the gold fingers of the VME bus interface are lightly inserted and removed, to avoid scratching the gold layer.

(4) Maintenance and Care

Regular inspection: inspect once a month the firmness of interface connections, oxidation of gold fingers, and status of indicator lights, use dry compressed air to clean dust; inspect once a quarter for any burnout of relay contacts or cracking of solder joints.

Programs and data: regularly back up board card configuration parameters and programs to prevent data loss; do not insert or remove expansion modules, communication lines, and debugging interfaces live, wear an anti-static wristband during maintenance to prevent component breakdown by static electricity.

Long-term shutdown: when not in use for a long time, cut off the power supply, remove the board card from the chassis, store it in a dry, anti-static environment, to avoid moisture, oxidation, and static damage.

(5) Spare Parts Selection

When purchasing, confirm the complete model XYCOM 81987-001A1805, clearly specify the characteristics of the 001 basic version + A standard industrial version, avoid confusion with the same series B/C versions; it is recommended to reserve 10%–15% of spare parts based on the number of system nodes, prefer the same model, to ensure consistent system performance after replacement; for the renovation of old systems, direct replacement with the same series old version is possible, without significant program modification, reducing renovation costs.

VIII. Summary XYCOM 81987-001A1805 is a standard VME bus I/O board card specifically designed for routine industrial conditions, featuring wide temperature stability, full-channel isolation, high-precision acquisition, high cost-effectiveness, and ease of maintenance. It primarily meets the signal acquisition and control requirements for scenarios such as process control, production line monitoring, building automation, and embedded systems, addressing the shortcomings of insufficient stability in ordinary board cards and the high costs of high-end board cards. Its standard A version reinforced design, 001 version's simplicity and efficiency, 8 channels of high-precision analog quantities, strong anti-interference and wide temperature operation, seamless compatibility with VME bus, etc., perfectly match the 7×24-hour continuous operation and 10-year lifecycle requirements of industrial equipment, effectively reducing system deployment and operation costs, and is a highly versatile, reliable, and cost-effective core I/O board card choice in industrial automation VME control systems.