Siemens 6ES7216-2BD23-0XB0 SIMATIC S7-200 CPU 226 Compact Unit

Description

The Siemens 6ES7216-2BD23-0XB0 is a SIMATIC S7-200 CPU 226 central processing unit designed for standalone or networked automation architectures. Functioning as a high-performance compact controller, this device integrates a multi-voltage AC power supply, 24 digital inputs, and 16 digital relay outputs within a single robust housing. It provides a reliable core for small-to-medium industrial control applications, utilizing an efficient integrated work memory system configured for up to 24 kbytes of program execution memory (or 16 KB when run-time editing is active) alongside 10 kbytes of dedicated data memory.

Equipped with two integrated RS-485 interfaces, the 6ES7216-2BD23-0XB0 enables simultaneous communication configurations. Both ports function as MPI slaves for coordinated data exchange with primary MPI masters such as S7-300 or S7-400 controllers, operator panels, and touch terminals. Additionally, they fully support the proprietary PPI protocol for comprehensive programming functions and device-to-device CPU communications. For third-party peripheral system integration, either interface can be deployed as a freely programmable interface with interrupt capabilities supporting standard ASCII serial protocol transfers at communication rates up to 115.2 kbps. Complete program structures are maintained maintenance-free on the internal EEPROM, while vital runtime variables are securely retained via a high-performance capacitor or an optional external battery backup module.

Features

• Integrated I/O Architecture: Built-in configuration featuring 24 digital inputs (24V DC) and 16 digital relay outputs to handle localized automation tasks directly.
• Dual Serial Ports: Two independent RS-485 serial interfaces supporting PPI, MPI slave, and user-programmable ASCII modes for flexible communication loops.
• High-Speed Processing: Fast execution speeds with bit logic processing times clocked at 0.22 microseconds maximum.
• Advanced Technological Functions: Includes six high-speed hardware counters rated at 30 kHz each, allowing seamless connection of up to two incremental quadrature encoders.
• Flexible Modular Expansion: Supports the addition of up to seven expansion modules from the SIMATIC S7-22x product line to scale I/O capabilities up to a maximum of 148 digital channels or 35 analog channels.
• Maintenance-Free Storage: Program and data blocks are automatically backed up to internal EEPROM, minimizing system downtime caused by complete power failures.

Applications

• Distributed control architectures in factory automation lines
• Packaging, material handling, and conveyor tracking control
• Machine tool automated systems with encoder feedback processing
• Pumping stations, water treatment facilities, and HVAC control loops
• SCADA system integration utilizing localized ASCII communication links

Technical Specifications

Installation Guidelines

• Mounting Configuration: The unit supports both horizontal and vertical mounting orientations on standard subpanels or DIN rails. For maximum thermal dissipation, horizontal placement is recommended to support up to 55 Celsius operational ambient conditions.
• Clearance and Ventilation: Maintain adequate spacing above, below, and adjacent to the device housing to facilitate natural convection cooling and prevent premature thermal stress.
• Potential Separation: The internal digital optocoupler inputs are isolated from internal logic circuits. The circuit configuration allows a maximum potential difference of 500 V DC between 24 V DC and 5 V DC paths, and 1500 V AC between 24 V DC and 230 V AC paths.
• Wiring Specifications: Utilize plug-in I/O terminals for field wiring connections. Ensure that all high-speed signals or encoder lines employ shielded cabling limited to a maximum length of 50 m to prevent electromagnetic degradation. Standard inputs can use up to 500 m of shielded cable or 300 m of unshielded cable.
• External Protection: External short-circuit protection must be provided externally for the relay outputs to protect contacts from inductive voltage spikes or current overloads.

Compliance and Certifications

• CE 
• EAC 
• China RoHS 
• FM (For use in hazardous locations) 
• DNV 
• GL 
• Lloyd's Register (LRS) 
• NK (Nippon Kaiji Kyokai) 
• RMRS 
• BUREAU VERITAS (BV) 
• CCS (China Classification Society)