ABB LDGRB-01 (3BSE013177R1) Dual Ethernet RNRP Redundant Communication Module for AC800M DCS

ABB LDGRB-01 with material code 3BSE013177R1 is a rack-mounted dual Ethernet communication card for ABB AC800M controller under System 800xA platform. It runs ABB 

proprietary RNRP redundant network protocol, realizing fault-tolerant redundant data transmission between CPU, local I/O racks, HMI and upper SCADA system. Equipped with two 

independent RJ45 Ethernet ports, it supports automatic network switching when one link fails, avoiding system communication interruption. Plug-in hot-swap design, powered by rack backplane, 

widely used in power, petrochemical DCS cabinets as core network maintenance spare part.

Technical Specifications

PN: LDGRB-01, Material No.: 3BSE013177R1, Origin: Sweden

Network Ports: 2× 10/100Mbps RJ45 Ethernet

Protocol: RNRP redundant network, TCP/IP, Modbus TCP

Matching Rack: AC800M standard backplane, compatible PM864/PM865/PM866 series CPU

Power Supply: 24VDC via rack backplane, low power consumption ≤5W

Mount: Plug-in rack module, hot swappable

Operating Temp: -25℃ ~ +70℃; Storage -40℃ ~ +85℃

Humidity: 5%–95% non-condensing; Protection IP20

Status Indicator: Front LED for power, link, fault, redundant channel status

Weight: ~0.32kg; Configuration Tool: Compact Control Builder M

Key Features

Dual independent Ethernet ports with RNRP redundancy, seamless link switch without process interruption.

Hot-swap support, online replacement without shutting down controller.

Front panel LED indicators for quick network fault diagnosis.

Full compatibility with all mainstream AC800M CPU models for easy spare interchange.

Industrial anti-interference circuit design, stable operation in strong EMC control room environment.

Compact single-slot rack design, saves cabinet layout space.

Supports multi-node network construction for large-scale distributed DCS systems.

Conformal coated PCB optional for high humidity and dusty industrial sites.

Application Scope

Redundant network communication expansion for thermal power plant boiler/turbine AC800M DCS control cabinets

Petrochemical refinery, chemical plant distributed process control system redundant network card

Metallurgy, cement, papermaking factory production line automation communication spare replacement

Water treatment, flue gas desulfurization & denitrification DCS network expansion unit

Offshore platform, LNG terminal process control system redundant communication module

Global aging System 800xA DCS renovation, spare inventory and network fault maintenance