Description
Schneider NW-BM85C002
Technical Specifications: Model: NW-BM85C002 Module type: PLC Ethernet communication interface module Backplane interface: Schneider proprietary PLC chassis backplane bus External port: Industrial Ethernet port Power supply: Supplied from PLC chassis backplane Operating temperature range: 0℃ ~ +60℃ Storage temperature range: -40℃ ~ +85℃ Relative humidity: 5% to 95%, non-condensing Form factor: Single slot rack plug-in module Protection grade: IP20 when installed inside control cabinet
Functional Features: Bidirectional data communication between Modicon PLC backplane and external Ethernet network. Protocol packaging and parsing for process data exchange with HMI and SCADA systems. Internal data buffer to smooth data transmission burst from controller. Real-time communication status monitoring and link fault detection. Front panel LED indicators for module power, Ethernet link, data traffic and hardware fault. Non-volatile memory stores network configuration parameters after power loss. Power-on self-test to check internal hardware circuit automatically. Support multiple concurrent Ethernet client connections for data access.
Application Scenarios: Legacy Modicon PLC system network retrofit, water treatment plant automation system, building management control system, food and beverage production line control, material handling conveyor control, mining auxiliary process control, power plant auxiliary equipment PLC remote monitoring.
Performance Parameters: Stable cyclic data exchange between PLC controller and Ethernet host devices. Fast detection of Ethernet cable disconnection and communication timeout. Continuous operation: 24 hours uninterrupted operation in industrial control cabinet. Data buffer prevents data loss during short communication fluctuation.
Material Composition: PCB substrate: Multi-layer FR4 glass fiber epoxy printed circuit board. Core components: Network communication processor, Ethernet physical layer chip, backplane bus interface IC, non-volatile memory chip. Front panel: Black flame retardant ABS plastic panel with silk screen marking and LED transparent windows. Backplane connector: Gold plated copper alloy contact pins with anti-oxidation treatment. Ethernet connector: Shielded RJ45 connector with gold plated contact pins.
Structural Features: Standard single slot rectangular plug-in board structure matching Schneider Modicon chassis. Front panel equipped with shielded RJ45 Ethernet port and multiple status LED indicators. Internal circuit layout separated into backplane bus interface area, data processing area and Ethernet transceiver area. Built-in mechanical locking latch to fix module securely in chassis slot. Signal isolation circuit to protect PLC backplane from surge interference coming from Ethernet cable.
Working Principle: Module receives operating power from Schneider PLC chassis backplane. It communicates with Modicon CPU controller via proprietary backplane bus. Controller process data is packaged into Ethernet protocol frames and sent to remote HMI, SCADA or engineering workstation through RJ45 port. Incoming read and write requests from Ethernet network are parsed, converted into backplane bus commands and transmitted to PLC CPU. On-board monitoring circuit continuously checks Ethernet link status and communication error rate. When communication failure is detected, fault indicator is activated and fault status is uploaded to PLC. All network parameters such as IP address and connection settings are saved into non-volatile memory.
Installation Requirements: Cut off PLC chassis power before inserting or removing NW-BM85C002 module. Insert module into empty designated chassis slot and lock mechanical latch. Connect industrial shielded Ethernet cable to RJ45 connector on module front panel. Set IP address, communication protocol and connection parameters via Schneider engineering software. Ensure control cabinet protective earth ground connection is reliable. Leave enough air gap between adjacent modules for heat dissipation. Separate control Ethernet cables and office network cables in different cable trays.
Usage Notes: Hot swap operation is forbidden when PLC chassis backplane is energized. Backup network configuration file before modifying IP settings or firmware upgrade. Use industrial grade shielded twisted pair Ethernet cable for field wiring. Regularly inspect RJ45 connector tightness and LED indicator status during maintenance. Wear anti-static wristband when handling module. Do not operate module outside rated temperature and humidity range. Prevent conductive dust, metal debris and liquid from entering module circuit area.
