SCHNEIDER PowerPact ™ H. Modbus Communication User Guide for J and L-type Circuit Breakers

SCHNEIDER PowerPact ™  H. Modbus Communication User Guide for J and L-type Circuit Breakers

Overview of Document Core

(1) Document positioning and scope of application

This guide is PowerPact ™  H. The comprehensive technical manual for Modbus communication of J and L-type circuit breakers is suitable for equipment installation personnel, maintenance personnel, and technical operators. Its core purpose is to provide full process guidance for the installation configuration, communication operation, data acquisition, remote control, and other aspects of Modbus protocol applications for this series of circuit breakers. The applicable equipment must meet specific firmware version requirements, such as MicroLogic 5 and 6 trip unit firmware ≥ V001.003.00 in IMU module, IFE Ethernet interface firmware ≥ V004.007.00, etc. Its core value lies in achieving remote monitoring and control of circuit breakers, including reading measurement data, diagnostic information, status conditions, remote operation of circuit breaker opening and closing, configuration of protection parameters, synchronization of date and time, etc. All operations must be carried out by qualified electrical personnel and strictly comply with password management and permission control requirements to ensure operational safety.

(2) Compliance and Safety Standards

International standards: Follow international electrical standards such as IEC/EN 60947-4-1, UL 508, CSA C22.2 No.14, etc.

Network security: The default password must be changed for the first use, and unused ports, services, and default accounts must be disabled; Networking devices require the deployment of multiple layers of network defense, such as firewalls and network segmentation; Adopting network security best practices such as minimum privilege and separation of responsibilities to prevent illegal access, data leakage, or service interruption.

Related documents: Need to be used in conjunction with PowerPact circuit breaker user guide, MicroLogic trip unit user guide, ULP system user guide and other related documents. The latest version can be downloaded from Schneider Electric's official website.

Detailed explanation of communication interface

(1) IFM interface (Modbus SL)

Core parameters

Part number: LV434000 (completely replacing TRV0021/STRV00210), compatible with MasterPact MTZ circuit breaker, while the old part number TRV0021/STRV00210 is not compatible with this model of circuit breaker.

Communication interface: equipped with RJ45 Modbus SL port and optional stacking interface (TRV00217), supporting multi interface expansion connection.

Address setting: The address is defined through the two rotary switches on the front panel, ranging from 1-99. The default address is 99, and address 0 is reserved for broadcasting and cannot be used for setting individual device addresses.

Power requirements: A 24Vdc power supply is required, and it is recommended to use UL certified/approved limited voltage/limited current level 2 power supply (maximum 3A). Only copper wires are allowed for wiring.

Padlock function: The arrow points to enable remote control commands when opening the padlock (factory settings); Disabled when pointing to the closed padlock, only the 'Set absolute time and get current time' command is not restricted.

Configuration method: default automatic configuration, can automatically detect baud rate (4800/9600/19200/38400) and parity; Network parameters can also be manually configured through the EcoStruxure Power Commission software.

Hardware Description and Installation

Hardware composition: including 24Vdc power terminal block, Modbus address rotary switch, Modbus flow status LED, Modbus padlock, ULP status LED, test button, mechanical lock, QR code (product information), RJ45 Modbus SL port, stacked additional interface, 2 RJ45 ULP ports.

Installation method: Installed on a DIN rail, stacking accessories can connect multiple IFM interfaces to each other without additional wiring. The IFM interface stacked on the IFE server is powered by the IFE server; When there is no IFE server, stacked IFM interfaces only require one power supply, and a single IFM interface needs to be powered separately.

Circuit diagram and connection specifications

Connection configuration: Depending on the type of circuit breaker, it can be connected to MicroLogic trip units, BSCM modules, or both simultaneously; Insulated NSX cables are required for systems with voltages greater than 480 Vac.

Port protection: The RJ45 port of the IFM interface is only suitable for ULP modules. The unused second ULP RJ45 connector needs to be sealed with a ULP line terminator to avoid equipment damage.

(2) IFE interface (Ethernet)

Core parameters

Type and Part Number: Divided into single circuit breaker Ethernet interface (LV434001/LV434010) and Ethernet server (LV434002/LV434011), LV434001 replaces LV434010, LV434002 replaces LV434011, the new part number has real-time clock (RTC) function, and the ULP connection distance with MasterPact MTZ circuit breaker can reach 20 meters, while the maximum connection distance with the old part number is 5 meters.