The MC0312 from Microcyber is a compact, high-performance embedded core module designed to bridge legacy Modbus-RTU devices with modern Ethernet-APL (Advanced Physical Layer) networks. Compliant with the 10BASE-T1L (IEEE 802.3cg) standard, it enables seamless upgrade of existing Modbus-based field instruments (such as temperature, pressure, flow, level transmitters, and actuators) to HART-IP protocol over Ethernet-APL.
This module supports bus-powered operation, 10 Mbps communication speeds, and cable lengths up to 1,000 meters—making it ideal for hazardous process automation environments requiring long-distance, two-wire Ethernet connectivity.
By integrating the MC0312, manufacturers can quickly transform traditional Modbus devices into HART-IP-compatible instruments, enabling high-speed digital communication, remote diagnostics, and integration with Industry 4.0 systems.
Key Features of the MC0312 Module
The MC0312 stands out in Microcyber’s MC series for its standardization and flexibility:
- Compact and Uniform Design: Measures 35mm × 35mm—identical across the MC series for easy integration.
- Standardized Interface: Uses 2.0mm pitch double-row 28-pin connectors (14 pins per row) for full compatibility with other MC modules.
- Easy Protocol Upgrades: Swap with other MC series modules to support different protocols without redesigning hardware.
- User-Friendly Configuration: Configured via Microcyber’s dedicated HRT MPT tool for simple setup and operation.
- Versatile Peripheral Interfaces: Includes UART, I2C, SPI, multiple GPIOs, and power outputs for expanded development.
- Protocol Support: Acts as Modbus-RTU master and HART-IP slave, converting Modbus register data to HART dynamic variables.
- Ethernet-APL Compliance: Full support for 10BASE-T1L with bus power supply and intrinsic safety potential.
These features make the MC0312 an efficient solution for developing next-generation APL-enabled field devices.
Physical Dimensions and Pinout
The MC0312 maintains a miniaturized footprint of 35mm (L) × 35mm (W), ideal for embedding in space-constrained instruments.
Pinout Description (28-Pin Double-Row Connector)
| Pin | Name | Description |
|---|---|---|
| 1 | TDO | Debug interface (leave floating) |
| 2 | TDI | Debug interface (leave floating) |
| 3 | RESET | Module reset |
| 4 | GND | Ground |
| 5 | TMS | Debug interface (leave floating) |
| 6 | RXD | UART receive |
| 7 | TXD | UART transmit |
| 8 | TCK | Debug interface (leave floating) |
| 9 | SPISTE | GPIO / SPI chip select |
| 10 | SPISOMI | GPIO / SPI master in |
| 11 | SPISIMO | GPIO / SPI master out |
| 12 | SPICLK | GPIO / SPI clock |
| 13 | VCC-3.3V | 3.3V power output |
| 14 | VCC-5V | 5V power output |
| 15–21, 24–25 | GPIO | General-purpose I/O pins |
| 22 | I2CSCL | GPIO / I2C clock |
| 23 | I2CSDA | GPIO / I2C data |
| 26 | GND | Ground |
| 27 | APL+ | Bus power positive |
| 28 | APL- | Bus power negative |
How the MC0312 Works: Modbus to HART-IP Conversion
Embedded directly into a Modbus-RTU device via TTL UART, the MC0312 acts as a Modbus master to poll data from registers (e.g., input and holding registers). It then maps this data to corresponding HART dynamic variables and exposes it as a HART-IP slave over the Ethernet-APL physical layer.
This enables:
- High-speed Ethernet communication in process fields.
- Seamless integration with HART-IP masters for digital diagnostics and configuration.
- Preservation of existing Modbus instrumentation while upgrading to modern IP-based networks.
Ethernet-APL System Topology
Ethernet-APL extends standard Ethernet to the field level using two-wire cabling, supporting power and data over distances up to 1,000 meters. The MC0312 enables field devices to connect directly to APL networks, integrating with switches, proxies, and higher-level systems like DCS or cloud platforms.
Typical applications include hazardous areas (with intrinsic safety) in oil & gas, chemicals, and pharmaceuticals.
Why Choose Microcyber’s MC0312?
Microcyber is a pioneer in Chinese fieldbus technology, with multiple “firsts” including internationally certified protocol stacks, instruments, and wireless products. As a key participant in national industrial IoT projects, Microcyber delivers reliable, innovative solutions backed by strong R&D expertise.
The MC0312 accelerates time-to-market for Ethernet-APL devices, reduces development costs, and future-proofs instrumentation in evolving process automation landscapes.
For detailed specifications, configuration tools, or integration support, visit Microcyber’s official resources or contact their team.