Schneider BMXAMO0802 Replacement for Modicon M340

Product Overview

Schneider BMXAMO0802 Replacement for Modicon M340: Seamless Analog Output Upgrade

The Schneider Electric BMXAMO0802 is an 8-channel analog output module designed for the Modicon M340 PLC platform. As aging M340 systems approach end-of-life or face discontinued spare part availability, facilities running continuous process control, HVAC automation, water treatment, or manufacturing lines increasingly require a reliable, drop-in replacement strategy that minimizes engineering rework and production downtime.

TOPNLMS supplies the BMXAMO0802 as a direct replacement module for existing Modicon M340 racks. Whether your plant is migrating from an older Modicon Quantum or Modicon Premium architecture to the M340 platform, or simply replacing a failed or aging BMXAMO0802 in an existing installation, this module slots directly into the BMX XBP rack (4-slot, 8-slot, or 12-slot configurations) without requiring rack or backplane modifications.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful BMXAMO0802 replacement or system migration rarely involves a single module swap. In most M340-based control architectures, the analog output module works in close coordination with several other components that may also require attention during a retrofit or upgrade project.

For sites migrating from Modicon Premium, the first challenge is typically the wiring interface. The legacy TSX AEY 800 or TSX AEY 1600 analog output modules used HE10 connectors, while the BMXAMO0802 uses a 20-pin removable screw terminal block. Field wiring must be re-terminated accordingly, and a BMX FTB 2010 or equivalent terminal block adapter can simplify this transition in panel-constrained environments.

On the controller side, the BMXAMO0802 is managed by an M340 CPU such as the BMXP342020 or BMXP342030, which run EcoStruxure Control Expert (formerly Unity Pro). If the existing program was written in PL7 Pro for a Modicon Premium CPU, the I/O channel configuration and function blocks for analog scaling will need to be rewritten — the BMXAMO0802 uses the IODDT T_ANA_OUT_GEN derived data type for channel management in Control Expert.

Power integrity is critical for analog output accuracy. The M340 rack is powered by a dedicated power supply module such as the BMXCPS2000 or BMXCPS3500A. When adding or replacing analog output modules, verify that the rack power budget accommodates the additional load — the BMXAMO0802 draws approximately 0.8 W from the backplane. In high-channel-count installations, a second rack with its own power supply module may be required.

For distributed I/O architectures where the BMXAMO0802 is installed in a remote rack connected via Ethernet/IP or Modbus TCP, the communication head module — typically a BMXNOE0100 or BMXNOE0110 Ethernet module — must be correctly configured to map the analog output channels to the controller’s I/O image table. Ensure the remote rack’s BMX XBP backplane is compatible with the communication head in use.

In applications where signal isolation is required between the PLC output and field devices (such as variable frequency drives, control valves, or positioners), a signal isolator or loop-powered transmitter barrier may be installed between the BMXAMO0802 terminal block and the field instrument. This is common in hazardous area installations or where ground loop interference is a concern.

Finally, for sites that also need to upgrade their HMI layer as part of the modernization project, the Magelis HMIGTO or Magelis HMISTU series touchscreen panels integrate natively with the M340 platform over Modbus TCP or Ethernet/IP, providing a consistent upgrade path for both the control and visualization layers without requiring a full system replacement.

Retrofit Guidance FAQ

Q: Can the BMXAMO0802 replace a TSX AEY 800 from a Modicon Premium system directly?
A: Not as a direct slot-in replacement — the rack backplane and connector types differ. You will need to install a BMX XBP M340 rack and re-terminate field wiring to the BMXAMO0802’s screw terminal block. The channel count (8 channels) is equivalent, but the programming environment changes from PL7 Pro to EcoStruxure Control Expert.

Q: Is the output signal range configurable per channel?
A: Yes. Each of the 8 channels on the BMXAMO0802 can be independently configured for either voltage output (0–10 V or ±10 V) or current output (0–20 mA or 4–20 mA) via the I/O configuration in EcoStruxure Control Expert. No hardware jumpers are required.

Q: What communication protocol does the BMXAMO0802 use?
A: The module communicates with the M340 CPU via the proprietary X-bus backplane — it does not require a separate fieldbus connection. For remote rack installations, the rack’s communication head module (e.g., BMXNOE0100) handles the Ethernet/IP or Modbus TCP link to the main CPU rack.

Q: How much physical space does the BMXAMO0802 occupy in the rack?
A: The BMXAMO0802 occupies one slot in a BMX XBP rack. Its dimensions conform to the standard M340 module form factor (approximately 100 mm H × 30 mm W × 115 mm D with terminal block). No additional slot spacing is required.

Q: Can I use the existing field wiring from my old analog output module?
A: In most cases, yes — provided the field wiring gauge and insulation rating are compatible with the BMXAMO0802’s screw terminal block (0.5–2.5 mm² conductors). If migrating from an HE10 connector-based module, a wiring adapter or re-termination at the terminal block will be required.

Q: What happens to the analog outputs during a CPU stop or communication fault?
A: The BMXAMO0802 supports configurable fallback behavior per channel — outputs can be set to hold last value, go to a preset safe value, or go to zero on CPU stop or communication loss. This is configured in the I/O channel properties within EcoStruxure Control Expert.

Warranty Assurance

Every BMXAMO0802 shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes functional verification including backplane communication check, channel output calibration verification, and visual inspection for physical integrity.

In the event of a confirmed defect within the warranty period, TOPNLMS will arrange a replacement unit or issue a refund based on the customer’s preference and stock availability. Our average response time for warranty claims is within 2 business days. Replacement units are dispatched from our Xiamen warehouse with priority shipping to minimize your system downtime.

We maintain buffer stock of the BMXAMO0802 and related M340 modules to support urgent replacement orders. Express air freight is available to most destinations worldwide, with typical transit times of 3–7 business days for international shipments. All units are shipped with ESD-protective packaging and include a test report upon request.

For procurement teams requiring documentation, we can provide a commercial invoice, packing list, certificate of origin, and product datasheet with each order. OEM and volume pricing is available for system integrators and MRO distributors managing multi-site M340 installations.

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