Serial Device Server MOXA A-812PG CR — 8-port 10/100 Mbps, CR model

MOXA A-812PG CR is an 8-port serial device server that provides 10/100 Mbps Ethernet connectivity for serial equipment. Designed to centralize communication of multiple RS-232/RS-422/RS-485 devices over a wired LAN, this device server allows remote access and management of legacy equipment without changing existing serial interfaces. The compact unit supports stable data transmission and integrates into industrial automation, building management, and remote monitoring systems to reduce wiring complexity and enable centralized control.

Advantages

The MOXA A-812PG CR consolidates multiple serial ports into a single Ethernet connection, simplifying network topology and lowering maintenance effort. With support for standard 10/100 Mbps Ethernet, the device ensures reliable throughput for typical serial-to-IP applications. Its design focuses on uninterrupted serial data forwarding and remote configuration, enabling centralized monitoring and easier integration with modern networked systems while preserving existing serial devices.

Suitable for (tasks / use cases)

• Connecting PLCs, sensors and meters to an IP network for centralized supervision
• Remote monitoring and control of serial-based equipment in industrial sites
• Integrating legacy RS-232/RS-422/RS-485 devices into building management systems
• Replacing extensive point-to-point serial wiring with networked access

Key specifications

• Number of serial ports: 8
• Ethernet interface: 10/100 Mbps
• Serial interface types: RS-232/RS-422/RS-485 (as supported by the model)
• Mounting: compact form factor suitable for DIN-rail or panel mounting (verify mounting option for specific setup)
• Protocols and features: serial-to-Ethernet data forwarding and remote configuration support

How to use

Install the MOXA A-812PG CR within the network rack or panel and connect its Ethernet port to the facility LAN switch using a standard Cat5e/Cat6 cable. Attach serial devices to the appropriate serial ports using compatible cabling and configure the serial interface type and communication parameters through the device’s web console or management utility. Assign an IP address that matches the network scheme and use the provided drivers or TCP/UDP socket connections to access each serial device from a host application or SCADA system.

Recommendations

Place the device in an environment with controlled temperature and humidity within the manufacturer’s operational limits and protect it from electrical noise sources. Verify serial wiring polarity and termination for RS-485/RS-422 links and use surge protection in installations prone to transients. Regularly update firmware and back up configuration settings to maintain secure and reliable remote access.