191xxseeria

191xxseeria is a designation used to describe a family of modular industrial automation devices intended for distributed control and sensing tasks. The series is characterized by its modular hardware architecture, where different input/output (I/O) and communication modules can be combined to form a compact controller network. The name combines the numeric 191xx prefix, suggesting generation and variant coding, with seeria, a term used in catalogs to denote a product line.

Historical context: The 191xxseeria was introduced in the late 1990s as a bridge between traditional fixed-function PLCs and later, more flexible embedded controllers. Over the 2000s, its modular approach and support for standard industrial fieldbuses made it common in small-to-medium automation projects.

Design and features: The devices are built around a modular chassis hosting fieldbus interface modules, digital and analog I/O, and one of several CPU modules. Typical configurations run a real-time operating system, support software libraries, and provide web-based or SCADA-friendly interfaces. Common power supplies are 24V DC, with IP-rated enclosures.

Variants and coding: The 191xxseeria uses a naming scheme where the trailing digits indicate I/O count and feature set (for example, 19121, 19135). Available fieldbus options may include CAN, Modbus TCP/RTU, EtherNet/IP, Profibus, and EtherCAT, depending on model. Some variants emphasize safety or redundancy.

Applications: Widely used in manufacturing, packaging, water treatment, building automation, and process control where compact, scalable controllers are required. The series is valued for straightforward integration with existing automation layers and for its flexible I/O options.

See also: Industrial automation, Programmable logic controller, Fieldbus.