In complex industrial environments such as oil refining, petrochemical production, and process control, real-time monitoring, data consistency, and equipment reliability are crucial. The BLIIoT BL191 OPC UA IO Module is designed to meet these exact demands, bridging field-level data acquisition with secure, standardized communication to SCADA, MES, and cloud platforms.
The BL191 supports multi-channel digital and analog IO, allowing direct connection to temperature sensors, pressure transmitters, flow meters, and valve actuators commonly used in refineries and chemical plants.
Its industrial-grade design ensures reliable performance under extreme temperature, vibration, and electromagnetic interference, making it ideal for hazardous and outdoor installations.
Key features:
8-channel configurable DI/DO or AI interface
High-precision 16-bit ADC for accurate analog signal acquisition
Galvanic isolation for each channel to prevent field interference
In modern process automation, OPC UA has become the preferred protocol for secure, interoperable communication across devices and systems.
The BL191 integrates native OPC UA server capabilities, enabling:
Direct data exchange with PLC, DCS, and SCADA systems
Role-based authentication and encrypted data transfer
Seamless integration with Siemens, ABB, Honeywell, and Yokogawa systems
This eliminates the need for complex middleware, reducing system latency and simplifying data flow from field IO to the enterprise level.
The BL191 supports edge logic functions, allowing it to perform local decision-making before data transmission. For example:
Automatically triggering alarms when tank pressure exceeds thresholds
Opening or closing valves based on real-time sensor feedback
Performing PID control loops directly at the edge
With Ethernet and Modbus RTU/TCP interfaces, the BL191 can act as both a Modbus slave or OPC UA node, enabling flexible integration in hybrid industrial networks.
(1) Oil & Gas Production
In upstream extraction and midstream transport, the BL191 monitors pressure, flow, and temperature in pipelines. It transmits key parameters to SCADA systems via OPC UA, enabling real-time anomaly detection and predictive maintenance.
(2) Petrochemical Plants
Used to monitor reactor temperature, flow rate, and pump status. Edge-based control ensures rapid response to process changes, improving safety and reducing downtime.
(3) Process Automation Systems
Acts as a field IO extension for DCS or PLC systems, enabling precise data collection and logic control in batching, mixing, and energy management systems.
Designed to meet industrial-grade standards, the BL191 offers:
Wide power input range (10–36V DC)
Operating temperature from -40°C to +85°C
DIN-rail mounting and compact design for control cabinet installation
Its rugged enclosure and EMC protection make it suitable for high-noise environments like refineries, compressor stations, and chemical reactors.
The BLIIoT BL191 OPC UA IO Module delivers a perfect balance between field-level reliability and cloud-ready intelligence. By combining flexible IO configuration, secure OPC UA communication, and edge computing capabilities, it becomes a key component in building smart, connected, and autonomous oil & chemical process systems.
