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Bachmann BES202 Bus Extension Slave Module

1. Product Description

An industrial-grade bus extension slave module designed to extend the transmission distance and expand node capacity of industrial fieldbus networks. The Bachmann BES202 operates as a slave device, seamlessly connecting to master controllers (e.g., Bachmann MPC240) or bus masters (e.g., DPM200 DP Master) via standard fieldbus protocols. It features dual bus ports for daisy-chain or star topology, signal amplification, and electrical isolation—enabling reliable data transmission in large-scale distributed systems. Ideal for harsh industrial environments where bus signals degrade over long distances or additional slave nodes need to be added beyond the master’s native capacity (e.g., large factories, outdoor infrastructure).

2. Detailed Specifications

2.1 Bus Extension Performance

Supported Protocols: PROFIBUS DP, Modbus RTU/TCP, Bachmann FAST BUS (compatible with mainstream industrial fieldbuses)

Transmission Distance Extension: Extends bus range by up to 1000 meters (twisted-pair cable); up to 2000 meters (fiber optic cable, optional adapter)

Node Expansion: Adds up to 32 additional slave devices per extension module (supports cascading of 4 BES202 modules for maximum 128 extra nodes)

Signal Amplification: Built-in signal booster (gain adjustable: 1-3 dB) to restore degraded signals over long distances

Latency: <1 ms (end-to-end signal delay, ensuring real-time data transmission)

2.2 Interface Configuration

Bus Ports: 2×fieldbus ports (RJ45 for twisted-pair; SFP slot for fiber optic, optional) – supports input/output bus signal separation

Diagnostic Interface: 1×USB 2.0 port (for local configuration, fault logging, and firmware updates)

Status Output: 2×digital output channels (configurable for alarm triggering, e.g., bus fault, power failure)

Power Input Port: 24 V DC terminal block (redundant power input option for critical systems)

2.3 Electrical Performance

Isolation: 3 kV AC isolation between input and output bus ports; 5 kV AC isolation between bus lines and power lines (prevents cross-interference)

Common-Mode Rejection Ratio (CMRR): ≥100 dB (at 50/60 Hz, reduces noise in industrial environments)

Input Voltage Range: 24 V DC ±20% (compatible with industrial power supplies)

Power Consumption: Typical 3 W, Maximum 5 W (excluding slave device power)

Surge Protection: EN 61000-4-5 compliant (6 kV contact, 10 kV air discharge) for bus and power ports

2.4 Operating Environment

Operating Temperature: -40°C ~ +70°C

Storage Temperature: -40°C ~ +85°C

Relative Humidity: 5% ~ 95% (non-condensing)

Vibration Resistance: 10-500 Hz, 2 g acceleration (IEC 60068-2-6)

Shock Resistance: 30 g acceleration, 11 ms duration (IEC 60068-2-27)

EMC Compliance: EN 61000-6-2 (industrial immunity), EN 61000-6-4 (industrial emissions)

2.5 Physical & Software

Dimensions: 110×75×28 mm (Length×Width×Height)

Mounting: DIN rail (EN 50022 standard); compatible with Bachmann BS203/BS204/BS210 backplanes

Weight: ~140 g

Software Support: Bachmann Studio (v4.0+; protocol selection, signal gain adjustment, fault diagnostics)

LED Indicators: 2×bus status LEDs (green: normal; red: fault) per port; 1×power LED (green); 1×amplification LED (yellow: active); 2×digital output LEDs (green: active)

3. Advantages & Features

Long-Distance Transmission: Extends bus range up to 2000 meters (fiber optic), solving signal degradation issues in large facilities (e.g., automotive plants, warehouses).

Node Expansion: Adds 32+ slave nodes per module, eliminating master node capacity limits (ideal for distributed sensor/actuator networks).

Dual-Port Flexibility: Twisted-pair + optional fiber optic ports support diverse installation environments (indoor/outdoor, high-EMI areas).

Robust Isolation & Protection: 3 kV port isolation + surge protection ensure reliability in noisy industrial electrical environments.

Easy Integration: Works with Bachmann masters/backplanes and third-party fieldbus devices—no proprietary adapters needed.

4. Application Fields

Large-Scale Manufacturing: Automotive assembly plants, electronics factories (extending bus to remote production lines, adding sensors/robots).

Outdoor Infrastructure: Water treatment plants, oil pipelines (extending bus to outdoor pumps/valves; fiber optic option for harsh weather).

Warehouse Logistics: Automated storage and retrieval systems (AS/RS) – extending bus to remote conveyor zones, adding barcode scanners.

Smart Buildings: Large commercial complexes, data centers (extending bus to floor-level HVAC units, lighting controllers, and security sensors).

Renewable Energy: Wind farms, solar parks (extending bus to remote inverter stations, weather monitoring sensors).

5. Precautions

Installation:

Mount on DIN rail or backplane; ensure 50 mm clearance for heat dissipation.

For fiber optic use, select industrial-grade SFP transceivers (compatible with Bachmann-recommended models).

Bus Configuration:

Set unique node ID for each BES202 (avoids conflicts); test bus latency after installation (ensure <1 ms for real-time systems).

Cascading limit: Max 4 modules per bus segment (prevents excessive latency).

Wiring:

Use shielded twisted-pair cables (CAT5e/CAT6) for electrical bus; ground shields at both ends.

For fiber optic, use single-mode/multi-mode cables based on distance (single-mode for >1000 meters).

Power Supply:

Use redundant 24 V DC power inputs for critical systems (e.g., power plants); avoid sharing power with high-current devices.

Maintenance:

Inspect bus cables/connectors quarterly (clean fiber optic connectors with lint-free cloth); check signal gain levels via Bachmann Studio.

Do not disassemble the module (voids warranty; risks damaging isolation components).

The structure and details of the product：
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