BACHMANN BES212N

Product Name

M1 System Bus Expansion Slave Module

Product Overview

The Bachmann BES212/N is a high-speed bus expansion slave module designed for the M1 automation system. It integrates an on-board 24 VDC power supply and supports daisy-chain topology to extend distributed I/O stations with ultra-low latency real-time data transmission.

Category:
Description

Technical Specifications

Daisy-chain topology with up to 6 substations; up to 15 M200 standard modules per substation; maximum 3 m distance between adjacent stations; access latency below 1.5 µs; supply voltage 18–34 VDC, maximum 1.2 A at 24 V; auxiliary outputs +5 V/2 A, +15 V/250 mA, –15 V/200 mA; 2× RJ45 ports for CAT7 dedicated cables.

Functional Features

Extremely low signal delay; integrated power supply reduces external wiring; RJ45 connectors simplify cabling; transparent access to extended modules without dedicated protocol; supports hot-swap maintenance.

Application Scenarios

Wind turbine control systems, distributed I/O in factory automation, multi-station machine control, energy management systems.

Performance Parameters

Operating temperature range –30 °C to +60 °C; storage temperature range –40 °C to +85 °C; protection class IP20; weight 0.5 kg.

Material Composition

Industrial flame-retardant plastic housing, metal shielding layer, gold-plated contact connectors.

Structural Features

Compact DIN-rail mount design; front panel with PWR status indicator; RJ45 interfaces on both sides; spring-loaded terminals at the bottom.

Working Principle

Acting as a bus expansion repeater, it extends the main backplane bus signal to remote substations via high-speed serial link. It maps I/O data transparently so the main controller accesses extended modules as if they were local devices.

Installation Requirements

Install on DIN rail with reliable grounding; use shielded CAT7 dedicated cables between stations; do not exceed 3 m cable length per segment; ensure power supply meets ripple requirements.

Usage Notes

Do not plug or unplug communication cables under power; avoid routing signal cables together with power cables in the same duct; check terminal tightness periodically; do not operate in strong EMI environments without shielding.

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