XYCOM 81987-101B1805 Product Introduction

XYCOM 81987-101B1805 (referred to as 81987-101B) is a wide-temperature ruggedized high-density analog I/O board card of the 1805 series from XYCOM. It further enhances the extreme temperature adaptability, anti-electromagnetic interference and signal long-term stability based on the 101A model. It is positioned as a flagship product for demanding industrial scenarios such as energy, metallurgy, chemical industry, and rail transportation, featuring full temperature range stability, high-precision acquisition, strong anti-interference, and long-term maintenance-free operation.

1. Core Positioning and Design Philosophy

This board card is based on the core design concepts of extreme environment adaptation, high-precision analog input, hardware-level anti-interference, and long-term reliability. It is developed for the -40℃ to +75℃ ultra-wide temperature range and strong electromagnetic interference industrial sites. It has 16 AI channels + 8 AO channels for high-density analog input/output, along with enhanced digital input/output channels and redundant communication. It can complete process industrial parameter monitoring and precise control without the need for expansion modules; it is compatible with XYCOM's entire series of PLCs, industrial computers, and mainstream DCS/SCADA systems, suitable for centralized and distributed architectures, and focuses on ultra-wide temperature stability, high-precision acquisition, strong isolation and anti-interference, and maintenance-free long life.

2. Hardware Configuration and Interface Specifications

Analog Input (AI) - Ultra-wide Temperature High-Precision Core: Equipped with 16 isolated AI channels, supporting full-scale adaptive range: 0-5V/0-10V/±5V/±10V voltage, 4-20mA/0-20mA current, compatible with PT100/PT1000 thermoresistors, K/S/T/E type thermocouples (built-in high-precision cold junction compensation), directly connecting temperature, pressure, flow, level, vibration, pH and other sensors. Channel resolution 18 bits, sampling rate 250Hz/channel, supports 8th-order digital filtering, non-linear calibration, sensor open circuit detection, acquisition accuracy ±0.02% FS, within the -40℃ to +75℃ full temperature range, the accuracy drift ≤ ±0.005% FS/℃, capable of stably capturing μV-level tiny signals.

Analog Output (AO) - Wide Temperature Precise Adjustment: Configured with 8 isolated AO channels, output 0-10V/±10V voltage or 4-20mA current, supports fault-safe output customization (pre-set output value when power failure / fault), suitable for precision control devices such as regulating valves, frequency converters, servo proportional valves, heating / cooling actuators. Output accuracy ±0.05% FS, response time ≤ 0.8ms, full temperature range output stability ≤ ±0.01% FS/℃, built-in PID self-tuning algorithm, suitable for complex closed-loop control.

Digital Input (DI) - Enhanced State Acquisition: Equipped with 8 high-speed isolated DI channels, supporting 24V DC industrial level, response time ≤ 0.5ms, with overvoltage, reverse connection, surge protection, capable of directly connecting emergency stop buttons, limit switches, relay contacts, proximity switches, etc., for equipment status feedback and safety signal acquisition.

Digital Output (DO) - High-Reliability Logic Control: Integrated 8 isolated DO channels, MOSFET output type, single channel maximum load 1A, supports driving relays, solenoid valves, contactors, indicator lights, etc., with short circuit, overload self-protection, supports pulse / level output mode, suitable for equipment start-stop, alarm output, loop interlock. Communication Interface - Redundant Anti-Interference Networking: Equipped with four interfaces of dual RS-485 + RS-232 + optional Ethernet, supporting Modbus RTU, ASCII, and Modbus TCP (Ethernet optional). Dual RS-485 baud rates range from 9600bps to 1Mbps, with a transmission distance of 1200 meters. It supports master-slave redundant switching and has anti-static / surge protection capability of ±8kV; RS-232 is used for local debugging; Ethernet (optional) has a 10/100Mbps speed, supporting remote parameter configuration and firmware upgrade, and is suitable for stable communication in strong interference environments.

Expansion and Calibration Interfaces: Reserved 1 I2C (for external memory / calibration module), 1 dedicated calibration interface, supporting on-site channel calibration and data backup, suitable for long-term operation precision maintenance.

III. Electrical and Physical Characteristics

Power Supply: 24V DC ±20% wide industrial power supply, power consumption ≤ 22W, built-in EMI filtering, reverse connection prevention, overcurrent, surge, voltage transient protection circuits, capable of withstanding drastic fluctuations in industrial power grids and strong electromagnetic interference.

Electrical Isolation: Analog channel isolation voltage 3500Vrms, digital channel 3000Vrms, communication interface 2000Vrms, industry-leading isolation strength, completely blocking ground loop and common-mode interference, suitable for strong electromagnetic interference sites.

Size and Installation: 160mm×100mm×28mm (reinforced thick type), industrial standard DIN rail + panel screw dual installation mode, comes with anti-vibration clamps and anti-loosening washers, suitable for compact installation in control cabinets and vibration environments.

Environmental Adaptability: Operating temperature **-40℃~+75℃** (extremely wide temperature range), storage temperature - 55℃~+95℃, relative humidity 5%-95% (no condensation); the circuit board uses high TG FR-4 flame-retardant material + three-proof reinforced coating (anti-dust, anti-humidity, anti-corrosion, anti-salt fog), vibration resistance level 8g (10-1000Hz), impact resistance level 20g, capable of long-term stable operation in high-temperature, low-temperature, high-humidity, dust, salt fog, strong vibration, strong electromagnetic interference extreme industrial sites.

Reliability Indicators: Mean Time Between Failures (MTBF) ≥ 100,000 hours, supports 7×24-hour continuous operation, suitable for long-term uninterrupted production scenarios in energy, metallurgy, etc.

IV. Core Functions

Ultra-wide Temperature Domain High-Density Analog Signal Acquisition: 16 AI channels for synchronous parallel sampling, compatible with four types of signals, built-in cold junction compensation and break detection, high-precision stable acquisition in the entire temperature range, multi-level filtering to eliminate noise, accurately capturing minor changes in process parameters, providing high-reliability data support for the system.

8 Channels Wide-Temperature Precise Closed-Loop Control: AO channels for high-precision output in the entire temperature range, built-in PID self-tuning algorithm, fast response, no static error, strong stability, suitable for temperature, pressure, flow, level and other complex closed-loop control scenarios, meeting precise adjustment requirements in extreme conditions.

Redundant Anti-Interference Communication and System Integration: Dual RS-485 redundant design, automatic fault switching, strong anti-interference capability; multiple communication interfaces compatible with mainstream protocols, can be used with PLC, DCS, SCADA, HMI and other devices to build a distributed redundant control system, achieving data sharing, collaborative control and remote monitoring.

Intelligent Fault Diagnosis and Hardware-level Protection: Built-in hardware monitoring circuits, real-time monitoring of power supply, channels, communication, board temperature and other parameters, precise feedback of fault types (short circuit, open circuit, overvoltage, signal abnormality, communication failure, over-temperature, etc.) through LED indicator lights and fault registers, supports fault log storage, remote alarm and historical query; The channel has self-recovery protection, automatically resumes operation after the fault is resolved, and automatically reduces frequency protection when overheating occurs to prevent hardware damage.

Convenient calibration and full lifecycle maintenance: Equipped with dedicated configuration and calibration software, it supports parameterization configuration for channel range, filtering, PID parameters, fault safety values, etc., supports online/offline calibration, calibration data backup/restore, and online firmware upgrade, simplifying system integration and maintenance processes, reducing manual calibration errors, and adapting to long-term operation accuracy maintenance.

VII. Key Advantages

Extremely stable in a wide temperature range: Full high-precision operation in the -40℃ to +75℃ temperature range, with minimal temperature drift, triple protection reinforcement + anti-vibration design, making it the preferred choice for extreme condition analog quantity acquisition and control.

High-density and high-precision analog performance: 16 AI + 8 AO channels, 18-bit resolution, ±0.02% FS accuracy, full-range adaptive, built-in thermal resistance / thermocouple support, meeting the high-precision requirements of process industry.

Hardware-level strong anti-interference: High isolation voltage, redundant communication, EMI filtering, anti-static surge design, suitable for strong electromagnetic interference industrial sites, avoiding signal distortion and communication interruption.

Ultra-long life and maintenance-free: MTBF ≥ 100,000 hours, stable operation throughout the entire lifecycle, reducing maintenance costs during downtime, suitable for long-term uninterrupted production scenarios.

VI. Typical Application Scenarios

Energy industry: Temperature / pressure / vibration monitoring for power boilers / steam turbines, extreme environment parameter acquisition for oil and gas extraction, monitoring and control of high-temperature equipment in photovoltaic / wind power stations.

Metallurgical industry: Temperature / pressure / flow monitoring and control in high-temperature zones of blast furnaces, converters, and continuous casting machines, precise adjustment of vibration and tension in rolling mills.

Chemical industry: Parameter monitoring in high-temperature / high-pressure environments of reaction vessels, precise control of distillation towers, process parameter acquisition in salt spray / corrosion environments.

Rail transportation: I/O control for vehicle-mounted high-temperature environments in locomotives / EMUs, signal acquisition and redundant communication networking.

Extreme manufacturing: Temperature control in high-temperature chambers of semiconductor equipment, monitoring of extreme environment parameters in precision mechanical processing, closed-loop regulation of automated production lines.

V. Notes

Before installation, ensure the system is powered off to avoid live operation; when wiring, strictly distinguish signal types and polarities. Analog signals use shielded twisted-pair cables and single-ended grounding, keeping away from strong power lines and high-frequency equipment; thermal resistance / thermocouple wiring requires matching types and proper cold junction compensation; avoid corrosive gases, strong dust, and direct sunlight in the working environment, regularly clean dust, check interface and latch status; when calibrating the channel, use high-precision standard signal sources to ensure accurate calibration data; when configuring parameters, set filtering, PID, and fault safety values reasonably according to extreme conditions to ensure stable system operation. This board card is designed with core concepts of extreme environment adaptation, high-precision analog quantity, hardware-level anti-interference, and long-term reliable operation, developed for the -40℃ to +75℃ ultra-wide temperature range and strong electromagnetic interference industrial sites. 16 AI + 8 AO high-density analog quantity channels, equipped with enhanced digital quantity channels and redundant communication, can complete full parameter monitoring and precise control in process industry without the need for expansion modules; compatible with the entire series of XYCOM PLCs, industrial computers, and mainstream DCS/SCADA systems, suitable for centralized and distributed architectures, focusing on ultra-wide temperature stability, high-precision acquisition, strong isolation anti-interference, and maintenance-free long life.