Yamatake MAH10-ME0100 ME-NET Communication Module (P:VT45)

The Yamatake MAH10-ME0100 (also referenced as P:VT45) is a network interface module for the ME-NET industrial control network. Designed for use with Yamatake controllers and field devices, this module enables high-speed data exchange and remote I/O management. It is part of the M-series or H-series control platforms.

ME-NET Protocol Features

ME-NET is a token-passing fieldbus operating at 1 Mbps. The MAH10-ME0100 acts as a master or slave station. Supports up to 64 nodes per segment. Maximum cable length: 500m per segment using shielded twisted pair. The protocol provides cyclic and acyclic data exchange. Error checking via CRC-16.

Technical Specifications

Communication speed: 1 Mbit/s. Isolation: 500V DC between network and logic. Power supply: 24V DC ±10% (consumption 150mA). Connector type: D-sub 9-pin female (screw lock). Indicators: 2 LEDs (RUN, NETWORK STATUS). Operating temperature: 0-55°C. Dimensions: 120 x 70 x 30 mm, DIN rail mount.

Compatibility

Compatible with Yamatake controllers such as C70, C75, DCP31, DCP30 series. Also works with select third-party gateways that support ME-NET. The module can interface to PLCs via a serial gateway. It is used in HVAC, boiler control, and process automation systems where legacy Yamatake networks are installed.

Configuration and Addressing

DIP switches for station address (1-64) and baud rate (1M fixed). Node ID must be unique on the segment. Termination resistors (120 ohm) required at both ends of the trunk line. Data mapping is configured via the host controller’s engineering software (e.g., Yamatake FIT or DCP Configurator).

Diagnostics

LED error codes: blinking RED indicates data collision or node conflict. Steady GREEN means normal operation. The module provides a self-test at power-up. Communication timeout can be configured from 10 to 255 ms. A watchdog output relay (normally closed) signals loss of communication.

Applications

Used in distributed control systems for industrial furnaces, environmental chambers, and food processing equipment. The ME-NET network allows remote setpoint control and data logging from multiple controllers. The MAH10 module retrofits older Yamatake systems needing network connectivity.

Environmental and Certifications

CE compliant, RoHS. IP20 protection. Pollution degree 2. Altitude<2000m. Storage: -20 to 70°C. Humidity 10-90% RH non-condensing. No cooling fan required.

Wiring Precautions

Use shielded twisted pair wire (Belden 9841 or equivalent). Ground shield at one point only. Keep network cable away from power cables. Maximum total trunk length 500m; stub length<1m per node for spur lines.

Conclusion

The Yamatake MAH10-ME0100 (P:VT45) provides reliable ME-NET network access for Yamatake controllers, enabling modern integration of legacy fieldbus systems into broader automation architectures.