Description
Product Overview
The BACHMANN CM202 is a ruggedized communication interface module designed for mission-critical data exchange in rail and industrial automation systems. As part of Bachmann’s M1 control platform, this module establishes deterministic connectivity between controllers, HMIs, and field devices while operating flawlessly in extreme environments. The CM202 supports multiple industrial protocols simultaneously – including Ethernet POWERLINK, PROFINET IRT, and Modbus TCP – enabling seamless integration with traction control, signaling systems, and third-party equipment. Its dual-port switch architecture (with M12 X-coded connectors) ensures <1µs synchronization accuracy for real-time control loops, while integrated firewall and VPN capabilities meet IEC 62443 cybersecurity standards. Engineered to EN 50155 railway specifications, the BACHMANN CM202 withstands temperatures from -40°C to +85°C, 5g vibrations, and 50g shocks, making it indispensable for rolling stock, tunnel control, and heavy industrial applications where network reliability directly impacts operational safety.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | CM202 |
| Manufacturer | BACHMANN |
| Product Type | Communication Interface Module |
| Ports | 2x Gigabit Ethernet (M12 X-coded) |
| Supported Protocols | POWERLINK V2, PROFINET IRT Class C, Modbus TCP/IP, IEC 61850 |
| Real-Time Performance | <1µs jitter, 250µs cycle time (POWERLINK) |
| Time Synchronization | IEEE 1588 PTPv2 (Precision Time Protocol) |
| Isolation | 1500V AC port-to-backplane |
| Certifications | EN 50155 (Tx: -40°C to +85°C), EN 50121-3-2 (EMC), SIL 2 |
| Cybersecurity | Hardware firewall, VPN (IPsec), MAC address filtering |
| Configuration | Web-based management or M1 System Manager |
| Power Consumption | 4.5W (24VDC ±30%) |
| Dimensions | 35 x 126 x 117 mm (WxHxD) |
| MTBF | >350,000 hours at 40°C |
BACHMANN CM202
Main Features and Advantages
Deterministic Network Performance: The CM202 guarantees sub-microsecond synchronization for motion control and safety interlocks via hardware-accelerated POWERLINK/PN IRT. Dual-redundant ring topologies (MRP) ensure zero packet loss during single-failure events.
Rail-Hardened Resilience: Conformal coating and shock-mounted components exceed EN 61373 Category 1 requirements. Operating at -40°C to +85°C (Tx temperature grade), the CM202 maintains full bandwidth in locomotive engine rooms or desert installations.
Multi-Protocol Flexibility: Simultaneously manage POWERLINK real-time domains while routing PROFINET IRT motion data and Modbus TCP process values – eliminating gateway devices. The CM202 supports up to 256 nodes per network segment.
Cybersecurity by Design: Hardware-enforced port security blocks unauthorized access. Integrated VPN tunnels encrypt data between trains and control centers. Certificate-based authentication meets IEC 62443-3-3 SL2 requirements.
Diagnostic Intelligence: Real-time monitoring of switch load, latency spikes, and error frames via SNMPv3. Automatic traffic prioritization (DSCP/QoS) ensures critical control data bypasses network congestion.
BACHMANN CM202
Application Field
The BACHMANN CM202 excels in transportation and industrial networks demanding hardened connectivity:
Railway Vehicle Control: Implements Train Communication Network (TCN) over IP backbone for traction control, door systems, and passenger information displays on high-speed trains (EN 50155 compliance critical).
Tunnel Safety Systems: Provides deterministic communication between ventilation fans, fire alarms, and PLCs in subway tunnels, surviving 85°C emergency temperatures.
Power Substations: Meets IEC 61850-8-1 GOOSE messaging requirements for protection relays while isolating control traffic from enterprise networks.
Mobile Machinery: Synchronizes hydraulic controllers and IoT sensors in port cranes or mining trucks, resisting 5g vibrations and humidity.
Industrial Process Control: Enables microsecond-level coordination between M1 safety controllers and robot arms in automotive SIL 2 applications.
Related Products
PL300: POWERLINK master module for legacy M1 systems
CM204: Advanced version with 4 ports and TSN support
M1 CPU 072: Multi-core controller pairing with CM202
SW202: Layer 3 managed switch for backbone networks
PS500: EN 50155-certified 110VDC power supply
RT202: Ruggedized router for trackside-to-train communication
BC201: Base carrier for mounting CM202 in M1 racks
Installation and Maintenance
Pre-installation preparation: Verify DIN rail grounding (<0.1Ω impedance) per EN 50121-3-2. Use shielded CAT6A SF/UTP cables with M12-to-RJ45 adapters where required. Isolate Ethernet runs >200mm from 110V+ power lines.
Maintenance recommendations: Monitor port CRC errors monthly via System Manager software. Clean M12 connectors annually with IPA to prevent corrosion-induced packet loss. Update firmware during scheduled downtimes using signed packages. Replace units showing >10⁻⁵ BER (bit error rate).
Product Guarantee
BACHMANN provides a 36-month warranty covering defects under EN 50155 operating conditions, extendable to 10 years through service agreements. The company guarantees lifetime firmware security updates and 15-year repair support. All CM202 modules undergo 500-hour burn-in testing (-40°C/+105°C thermal cycling + 5g vibration) before shipment. Global technical support includes 24/7 critical failure response with 4-hour escalation for SIL 2 systems.
