Product Overview

The Schneider Electric BMXP3420102CL powers your Modicon M340 automation system. This processor module requires a separate memory card for operation. It supports up to 1024 discrete I/O points in multi-rack configurations. The BMXP3420102CL includes a built-in CANopen master for motion control. You get integrated Modbus serial ports and USB connectivity. This CPU suits mid-sized machine control and process applications.

Critical Note – Memory Card Required

The BMXP3420102CL will not operate without a memory card. This processor has no internal non-volatile storage. You must purchase a compatible BMX XBP memory card separately. Supported card types include BMXRMS008GP, BMXRMS032GP, or BMXRMS064GP. Insert the card into the front slot before applying power.

Technical Specifications

Processor Performance

• Instruction Speed (Boolean): 0.12 µs

• Instruction Speed (Double-length words): 0.17 µs

• Instruction Speed (Single-length words): 0.25 µs

• Instruction Speed (Floating points): 1.16 µs

• Execution Rate (100% Boolean): 8.1 Kinstructions per ms

• Rate (65% Boolean + 35% arithmetic): 6.4 Kinst/ms

• System Overhead (Master Task): 0.7 ms

• System Overhead (Fast Task): 0.13 ms

Application Structure

• Master Task: 1 cyclic/periodic

• Fast Task: 1 periodic

• Event Tasks: 64 maximum

• Auxiliary Tasks: None

The BMXP3420102CL executes Boolean logic quickly for high-speed applications. Its 0.12 microsecond speed handles fast interlocks and positioning routines. The processor supports up to 64 event-triggered tasks for complex sequencing.

Memory Architecture

• Internal RAM Total: 4096 kB (4 MB)

• Program, Constants, and Symbols: 3584 kB

• Data Memory: 256 kB

• Unlocated Internal Data: 256 kB maximum

Object Areas (Default Sizes)

I/O Capacity

Discrete I/O

• Multi-rack Configuration: 1024 I/O maximum

• Single-rack Configuration: 704 I/O maximum

Analog I/O

• Multi-rack Configuration: 256 I/O maximum

• Single-rack Configuration: 66 I/O maximum

Application Specific Channels

• Total Channels: 36 maximum

• Includes: Counting, motion, serial, HART, and SSI functions

The BMXP3420102CL supports up to 4 racks with 11 slots each. This configuration provides substantial I/O capacity for most machine applications.

Rack and Slot Configuration

Use BMX XBP backplanes for rack interconnection. The BMXP3420102CL automatically recognizes all connected racks during startup.

Communication Ports and Capabilities

Integrated Ports Summary

Serial Communication Details

• Non-isolated serial link (RS232C): 2 twisted shielded pairs, full duplex at 0.3…19.2 kbit/s

• Non-isolated serial link (RS485): 1 twisted shielded pair, half duplex at 0.3…19.2 kbit/s

• Modbus Protocol: RTU or ASCII

• Character Mode: Asynchronous baseband

• Address Range: 0…248 for both Modbus and character mode

CANopen Master Specifications

• Protocols Supported: DS 301 V4.02, DS 303-2, DS 405

• Topology: Daisy-chain or tap junctions with CSMA/CA

• Number of Servers: 63 CANopen devices maximum

• Network Management (NMT): Supported

• PDO (Process Data Object): Supported

• SDO (Service Data Object): Supported

• Special Functions: SYNC, EMCY, TIME

CANopen Transmission Rates and Distances

Select the appropriate baud rate for your BMXP3420102CL CANopen network based on cable length. Use twisted shielded pair cable with 120 ohm termination resistors at both ends.

Communication Module Expansion

• Ethernet Communication Modules: 2 maximum

• AS-Interface Modules: 4 maximum

Add communication modules to the BMXP3420102CL for Ethernet or AS-i connectivity. The processor handles up to 6 total communication modules.

Monitoring and Diagnostics

The BMXP3420102CL includes embedded diagnostic capabilities:

• Modbus Diagnostic Counters: Monitor serial communication health

• Modbus Event Counters: Track transmission errors and retries

• CRC Checking (RTU): On each frame

• LRC Checking (ASCII): On each frame

Power Requirements

• Current Consumption: 90 mA at 24V DC

• Power Supply: Internal via M340 rack backplane

• Power Dissipation: Approximately 2.2 W typical

The BMXP3420102CL draws power directly from the rack. No separate power connection is required. Ensure your power supply has sufficient capacity for all installed modules.

Status LEDs

The Schneider Electric BMXP3420102CL provides seven diagnostic indicators:

Environmental Specifications

Operating Conditions

• Temperature (Operation): 0…60°C (32…140°F)

• Relative Humidity: 10…95% non-condensing

• Protection Rating: IP20

• Protective Treatment: TC (conformal coating)

Altitude and Directives

• Directives: 2014/35/EU (LVD), 2014/30/EU (EMC)

• Standards: EN 61131-2, EN/IEC 61010-2-201, UL 61010-2-201, CSA C22.2 No 61010-2-201, IACS E10, EN/IEC 61000-6-5 (type 1 and 2), EN/IEC 61850-3 (location G)

• Hazardous Location: Class I Division 2

Certifications

• CE

• UL

• CSA

• RCM

• EAC

• Merchant Navy

The BMXP3420102CL carries Merchant Navy certification for marine environments. Use this processor on ships, offshore platforms, and port equipment with confidence.

Installation Guidelines

Follow these steps to install the BMXP3420102CL processor:

1. Turn off power to the M340 rack completely.

2. Insert a compatible BMX XBP memory card into the front slot.

3. Slide the BMXP3420102CL into the dedicated CPU position.

4. Push firmly until the module seats in the backplane connector.

5. Secure the module with the retaining clip at the bottom.

6. Connect programming USB cable to the mini B port if needed.

7. Connect CANopen devices to the SUB-D 9 port.

8. Attach Modbus serial devices to RJ45 ports as required.

9. Apply 24V DC power to the rack backplane.

10. Wait for the RUN LED to become steady green.

Do not operate the Schneider Electric BMXP3420102CL without a memory card. Always use shielded cables for CANopen and serial connections. Terminate both ends of the CANopen bus with 120 ohm resistors.

Programming Software

Use the following software to program the BMXP3420102CL:

The BMXP3420102CL supports all five IEC 61131-3 programming languages. Control Expert provides the best programming experience with this processor.

Packaging List

• 1 x Schneider Electric BMXP3420102CL processor module

• 1 x protective cover for memory card slot

• 1 x quick start installation guide

• Note: Memory card not included (sold separately)

Common FAQs

Q1: Why does my BMXP3420102CL not start after power up?
A1: The BMXP3420102CL requires a memory card to operate. Insert a BMX XBP memory card into the front slot before applying power.

Q2: What memory cards work with the BMXP3420102CL?
A2: Compatible cards include BMXRMS008GP (8MB), BMXRMS032GP (32MB), and BMXRMS064GP (64MB). The BMXP3420102CL does not accept other card types.

Q3: Can the BMXP3420102CL control servo drives directly?
A3: Yes, the built-in CANopen master on the BMXP3420102CL controls Lexium 32 and other CANopen servo drives. Use the CANopen SUB-D 9 port.

Q4: How many Modbus devices can I connect to the BMXP3420102CL?
A4: The BMXP3420102CL supports up to 32 Modbus devices on RS485. You can also connect 2 point-to-point Modbus devices on RS232.

Q5: Does the BMXP3420102CL support Ethernet communication?
A5: The processor has no built-in Ethernet port. Add BMX NOE 0100 or BMX NOC 0401 modules to give the BMXP3420102CL Ethernet connectivity.