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Bachmann BS203 Backplane Module

1. Product Description

A compact industrial backplane module designed for small-to-medium automation systems, serving as a centralized interconnection hub for Bachmann modules. The Bachmann BS203 enables stable power distribution and real-time signal transmission between controllers (e.g., MPC240), I/O modules (e.g., DIO264, AO202/SI), and communication modules. With a streamlined slot design, robust environmental adaptability, and compatibility with Bachmann’s industrial ecosystem, it provides a cost-effective, reliable solution for applications requiring simplified system integration in harsh industrial environments.

2. Detailed Specifications

2.1 Slot Configuration
- Number of Slots: 3 standard slots (compatible with Bachmann 32-bit industrial modules)
- Slot Compatibility: Supports processor modules, digital/analog I/O modules, and basic communication modules
- Slot Spacing: 15 mm per slot (compliant with EN 50022 DIN rail standard)
- Slot Isolation: 2.5 kV DC isolation between adjacent slots (reduces cross-signal interference)
2.2 Power Distribution
- Input Voltage: 24 V DC ±20% (single power input with surge protection)
- Power Output to Modules: 24 V DC (stable output per slot; 0.8 A maximum current per slot)
- Power Consumption: Typical 1.5 W (excluding power consumed by connected modules), Maximum 2.5 W
- Power Protection: Overcurrent, overvoltage, and short-circuit protection (centralized for the backplane + per-slot current limiting)
2.3 Signal Transmission
- Signal Bus Type: High-speed parallel data bus (optimized for small-system latency)
- Maximum Signal Transmission Rate: Up to 50 Mbps (sufficient for real-time data exchange in 3-slot systems)
- Signal Isolation: 2.5 kV AC isolation between signal lines and power lines
- Bus Protocol Support: Bachmann proprietary communication protocol; compatible with Modbus RTU (via connected modules)
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 (compliant with IEC 60068-2-6)
- Shock Resistance: 30 g acceleration, 11 ms duration (compliant with IEC 60068-2-27)
- EMC Compliance: EN 61000-6-2 (industrial immunity), EN 61000-6-4 (industrial emissions)
2.5 Physical Dimensions
- Size: 85×80×30 mm (Length×Width×Height)
- Mounting Type: DIN rail mounting (compatible with EN 50022 standard)
- Weight: Approximately 180 g
- Material: Flame-retardant ABS plastic (UL94 V-0 rating; lightweight yet durable)
2.6 Mechanical & Electrical Features
- Module Locking: Plastic snap-lock mechanisms (secure module fixation; easy insertion/removal)
- Connection Type: Tin-plated pin connectors (low contact resistance; minimum 8,000 insertion/extraction cycles)
- LED Indicators: 1 power indicator (green, for 24 V DC input status) and 3 slot status indicators (green, for module connection status)
3. Advantages & Features
1. Compact Design: 3-slot configuration suits small-to-medium systems; saves DIN rail space compared to larger backplanes.
1. Stable Power Delivery: Per-slot current limiting + centralized protection ensures safe power supply to connected modules.
1. Low Latency Signal Bus: 50 Mbps transmission rate meets real-time data needs for 3-module systems (e.g., PLC + DIO + AO).
1. Easy Integration: Compatible with Bachmann’s core controllers (MPC240) and I/O modules (DIO264, AO202/SI); no additional adapters required.
1. Cost-Effective: Streamlined functionality balances performance and cost, ideal for budget-conscious small-system deployments.
4. Application Fields
- Small-Scale Industrial Automation: Standalone machinery (e.g., packaging machines, small conveyors) requiring 1-2 I/O modules + a controller.
- Building Sub-Systems: Zone-specific HVAC control, lighting panels, or access control units (localized signal processing).
- Portable Test Equipment: Mobile industrial testers (e.g., sensor calibration tools) needing compact module integration.
- Water Treatment Units: Small-scale pump stations, chemical dosing units (connects PLC + analog I/O for process control).
- Retail & Logistics: Automated shelving systems, small-scale conveyor sorters (simplified control with minimal modules).
5. Precautions
1. Installation: Mount on EN 50022-compliant DIN rails; ensure 40 mm clearance on both sides for heat dissipation; avoid direct sunlight or oil splashes.
1. Module Handling: Power off the backplane before installing/removing modules; align module connectors with slot guides (do not force insertion to prevent pin bending).
1. Power Supply: Use a regulated 24 V DC power supply (ripple <50 mVpp); connect a 1 A slow-blow fuse in the power line for additional protection.
1. Wiring: Secure power input terminals with 0.5-1.5 mm² cables (torque: 0.4-0.6 N·m); keep power cables separate from signal cables to reduce interference.
1. Maintenance: Monthly checks of LED indicators (ensure no fault lights); clean dust from connectors with a dry, soft brush; do not disassemble the backplane (voids warranty).

The structure and details of the product：
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