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ManualsBrandsSquare D ManualsCircuit BreakersMolded Case Circuit Breaker (600 VAC, 100 Amps)

100

PowerPact H-, J-, and L-Frame Circuit Breakers

Trip Units

Four Functional Levels

All PowerPact H-, J-, and L-frame circuit breakers devices can be equipped with the communication

function using a pre-wired connection system and a Modbus™ communication interface module. The

interface module can be connected directly or through the front display module (FDM121).

The PowerPact H-, J-, and L-frame circuit breakers can be integrated in a Modbus communication network.

Four functional levels can be used separately or combined to adapt to all supervision requirements.

Modbus Principle

The Modbus RS 485 (RTU protocol) system is an open bus on which communicating Modbus devices

(PowerPact and Masterpact circuit breakers, Power Meter PM700, PM800, etc.) are installed. All types

of PLCs and microcomputers may be connected to the bus.

Number of Devices

The maximum number of devices that may be connected to the Modbus bus depends on the type of

device (PowerPact circuit breaker with Modbus COM, PM700, PM800, Masterpact circuit breaker,

etc.), the baud rate (19200 is recommended), the volume of data exchanged and the desired response

time. The RS 485 physical layer offers up to thirty-two connection points on the bus (one master, thirty-

one slaves).

Length of Bus

The maximum recommended length for the Modbus bus is 3940 feet (1200 meters).

Bus Power Source

A 24 Vdc power supply is required (less than 20% ripple, insulation class II).

Level Function

Communication of status indications

Compatible with PowerPact H-, J- and L-frame circuit breakers and automatic

switches. Use the BSCM module to access the following information:

• ON/OFF position

• trip indication

• fault-trip indication

Communication of commands

Available on all circuit breakers and automatic switches with communicating motor

operators, the remote control can be used to:

• open

• closed

• reset

Communication of measurements with

Micrologic 5/6 A or E trip unit

This level provides access to:

• instantaneous and demand values

• maximums/minimums

• energy metering

• demand current and power

• power quality

Communication of operating assistance with

Micrologic 5/6 A or E trip unit

This level also provides access to:

• protection and alarm settings

• time-stamped histories and event tables

• maintenance indicators