This universal analog input board collects standard industrial analog signals transmitted by on-site transmitters and converts them into digital signals for transmission to the DCS main controller. It supports mainstream input types: 4–20mA DC current, 0–5V / 0–10V voltage signals. Each channel adopts independent A/D conversion and isolated sampling design to eliminate cross-channel signal crosstalk. The module integrates loop power supply for two-wire transmitters, and supports real-time diagnosis of open circuit, short circuit and over-range faults of field signal loops, feeding fault status back to the control system.
As the original basic version of the analog input series, G01 is equipped with standard linear A/D sampling circuit and single-stage isolation design, which can meet the conventional pressure, flow, liquid level and other process parameter collection requirements of thermal power, petrochemical, metallurgy and other industries. Low-temperature drift sampling chips are used to ensure stable acquisition accuracy under normal cabinet working temperature.
The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with basic electromagnetic shielding layout. Each input channel realizes 1000V AC/DC galvanic isolation between field signal terminals and internal logic circuits, effectively isolating surge and common-mode interference from on-site transmitter loops. All finished modules pass complete factory reliability tests: 72-hour high-low temperature cyclic aging test, full-channel full-range linearity calibration, long-term full-load MRC Link bus communication burn-in test, and comprehensive signal loop open/short-circuit fault simulation test.
It supports single-slot hot-swappable online replacement without powering off the entire remote I/O station, and each channel integrates multi-layer hardware protection functions: surge suppression, overvoltage protection, reverse polarity prevention, overcurrent automatic locking protection. Independent LED diagnostic indicators separately display power supply status, MRC bus communication link status and single-channel signal loop fault alarm information, facilitating rapid on-site inspection and maintenance.
Technical Specifications
PCB Substrate: Multi-layer high heat-resistant FR-4 industrial printed circuit board
Operating Temperature Range: -25℃ ~ +75℃
Storage Humidity: 5% ~ 90% RH, non-condensing
EMC Compliance: Industrial Class II, CE certified, compliant with EN 61000 series anti-interference standards
Communication Bus: Dedicated MRC Link differential bus for Ovation remote I/O racks
Channel Isolation Withstand Voltage: 1000V AC/DC galvanic isolation per independent input channel
Supported Input Signals: 4–20mA DC, 0–5V DC, 0–10V DC; built-in two-wire transmitter loop power supply, linear error ≤ ±0.05%FS
On-board Integrated Protections: Surge suppression, overvoltage protection, overcurrent protection, reverse polarity prevention, loop short-circuit self-locking protection
Installation Mode: Single-slot hot-swappable plug-in module matched with standard Ovation DCS rack backplane
Quality Warranty: Genuine original Emerson/Westinghouse product, equipped with independent factory inspection test report, 12-month official warranty
Application Fields
Medium and super-large thermal power plant Ovation WDPF distributed control systems, multi-unit integrated petrochemical flow, pressure and liquid level signal acquisition cabinets, metallurgical furnace process parameter monitoring stations, large municipal waste incineration plant flue gas parameter collection systems, pulp & paper factory production line process signal acquisition racks, multi-rack redundant central control rooms of traditional heavy industry, continuous production line analog parameter monitoring automation platforms for energy and chemical industry, centralized DCS monitoring and control systems for large-scale distributed energy storage power stations
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