Overview of the Schneider BMXP3420302 Processor Module
The Schneider BMXP3420302 is a processor module from the Modicon M340 automation platform. It combines CANopen and Ethernet TCP/IP connectivity for flexible industrial control. Engineers can manage up to 1024 discrete I/O in a multi-rack configuration or 704 in a single-rack setup. For analog signals, it supports up to 256 I/O in multi-rack mode and 66 in single-rack mode. This module also handles 36 application-specific channels.
Key Technical Specifications
The BMXP3420302 includes a USB port at 12 Mbit/s and a CANopen master bus with SUB-D 9 connector supporting 20 kbit/s to 1 Mbit/s. The Ethernet TCP/IP port uses an RJ45 connector with 10/100 Mbit/s speed. It supports up to 63 CANopen slave devices and provides various communication services like NMT, PDO, and SDO. The processor memory includes 4096 kB internal RAM, with 256 kB for data and 3584 kB for program, constants, and symbols. A supplied memory card (BMXRMS008MP) backs up programs and activates the standard web server.
Performance metrics include an execution time of 0.12 µs for Boolean instructions and 1.16 µs for floating points. The module executes 8.1 Kinstructions per ms for 100% Boolean logic. It features one cyclic/periodic master task, one periodic fast task, and 64 event tasks. System overhead is 0.7 ms for the master task and 0.13 ms for the fast task.
Connectivity and Control Capabilities
This processor manages up to two Ethernet communication modules and four AS-Interface modules. It supports motion control for independent axes via CANopen. The CANopen bus uses M20 DS 301 V4.02 and other profiles, with devices linked by daisy-chaining or tap junctions using CSMA/CA. Transmission rates vary by distance, from 1 Mbit/s up to 20 m to 20 kbit/s up to 2500 m.
Additionally, the module includes embedded communication services for Ethernet TCP/IP, such as bandwidth management, data editor, Modbus TCP messaging, rack viewer, and SNMP network administrator. The front panel features multiple status LEDs for network activity, processor run, I/O faults, and memory card errors.
Environmental and Certification Details
The BMXP3420302 operates in temperatures from 0 to 60 °C and relative humidity up to 95% without condensation. It has an IP20 degree of protection and carries CE, UL, CSA, RCM, EAC, and Merchant Navy certifications. The module meets standards EN 61131-2, EN/IEC 61010-2-201, and others. It is suitable for hazardous locations Class I Division 2.
For power, the module consumes 135 mA at 24 V DC and receives internal supply via the rack. Its net weight is 0.474 lb (0.215 kg). The product is manufactured in France and is returnable.