MERAK 681H10078 681K10078 681K10079 Industrial Control Modules
The MERAK 681H10078, 681K10078, and 681K10079 are industrial automation control modules belonging to the safety and process control unit series. These modules are designed for high-reliability applications in power generation, petrochemical processing, rail transportation, and other critical infrastructure sectors. They provide core functions including logic control, safety interlocking, data acquisition, and real-time control with fault-tolerant design. The 681H10078 is the base model, the 681K10078 is an enhanced model with additional I/O, and the 681K10079 is a redundant model with dual-CPU architecture.
Technical Specifications
681H10078 (Base Model): ARM Cortex-M4 processor (160MHz with FPU), 128KB Flash/32KB RAM, 8DI/4DO (24V DC), RS485 (Modbus RTU) + 1 Ethernet, 24V DC ±10%, ≤5W, 90×60×30mm, approx. 0.2kg
681K10078 (Enhanced Model): ARM Cortex-M4 processor (160MHz with FPU), 256KB Flash/64KB RAM, 16DI/8DO (24V DC) + 4AI (12-bit), dual RS485 + dual Ethernet (Modbus TCP/RTU), 24V DC ±10%, ≤8W, 90×60×30mm, approx. 0.2kg
681K10079 (Redundant Model): Dual ARM Cortex-M4 processors (160MHz with FPU each), 512KB Flash/128KB RAM, 16DI/8DO (24V DC) + 4AI (12-bit) + redundant I/O, dual RS485 + dual Ethernet (redundant ring network), 24V DC ±10% with redundant power supply, ≤10W, 90×60×30mm, approx. 0.25kg
Communication Protocols: Modbus RTU, Modbus TCP (support for multiple protocols)
Mounting: DIN rail (35mm) with metal housing
Operating Temperature: -20°C to +70°C
Storage Temperature: -40°C to +85°C
Humidity: 5% to 95% RH (non-condensing)
Applications: Logic control, safety interlocking, data acquisition, multi-axis motion control, process control
High-Reliability Control for Critical Applications
These MERAK control modules feature a modular design for easy installation, maintenance, and expansion. The 681K10079 redundant model implements dual-CPU architecture and redundant power supply for fault-tolerant operation in mission-critical systems. The modules incorporate safety protection features to prevent abnormal conditions from causing harm to equipment and personnel. They support high-precision multi-axis motion control and process control with advanced control algorithms. The compact dimensions (90×60×30mm) and DIN rail mounting allow efficient use of control cabinet space.
Flexible Communication and Integration
All three modules support multiple communication protocols including RS485 with Modbus RTU and Ethernet with Modbus TCP, facilitating easy data transmission and control with various industrial devices. The enhanced 681K10078 and redundant 681K10079 models feature dual RS485 and dual Ethernet ports for increased connectivity and network redundancy. The redundant ring network support ensures continuous communication even if a network segment fails.
Application Domains
These control modules are used in power generation plants for turbine control and monitoring, petrochemical facilities for safety interlocking systems, rail transportation for signaling and control, industrial automation for production line control, and robotic systems for motion control and coordination.
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