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The Schneider Electric BMXAMO0802 is an 8-channel analog output module for the Modicon M340 platform, designed for current-loop control of valves, drives, and process actuators. Process plants standardized on M340 use the BMXAMO0802 wherever a single rack needs more than four analog outputs, and as M340 installations age, this module shows up frequently in spare-parts requests. This page consolidates the verified specifications, points out the difference between the BMXAMO0802 and the voltage-output BMXAMO0410, and lists the modules typically ordered alongside it.
BMXAMO0802 Technical Specifications
- Series: Modicon M340 analog output module
- Channels: 8 isolated current outputs
- Output range: 0-20 mA and 4-20 mA, software-selectable per channel
- Resolution: 16-bit (verify against the user manual revision)
- Load impedance: 0 to 600 ohm typical for current outputs
- Isolation: channel-to-channel and channel-to-bus isolation
- Conversion time: short cycle time per channel; refer to the M340 hardware reference for the exact value matching your firmware
- External power: 24 VDC required for the output stage, supplied through the front terminal block
- Connection: 28-pin terminal block (FCN connector) or telefast pre-wired cable
- Diagnostics: per-channel open-loop and out-of-range detection
- Backplane: BMXXBP rack series, occupies one slot
- Approvals: UL, CSA, CE, ATEX (verify against the date code on the unit)
For the exact resolution, conversion time, and diagnostic behavior on your firmware revision, always cross-check the Schneider M340 hardware reference manual that matches the date code printed on the side of the module.
Same-Series Comparison: BMX Analog Output Family
| Model | Channels | Signal | Typical use |
|---|---|---|---|
| BMXAMO0210 | 2 | Current and voltage | Small loop count, mixed signal |
| BMXAMO0410 | 4 | Current and voltage | Standard density, voltage drives |
| BMXAMO0802 | 8 | Current only (0-20 / 4-20 mA) | High-density current-loop output, slot-saving |
| BMXAMM0600 | 4 in / 2 out | Mixed analog | Balanced I/O on a single module |
The BMXAMO0802 is the right choice when the application is purely current-loop and the rack space is tight. If the project has voltage-driven actuators (0-10 V dampers, certain VFDs in voltage reference mode), the BMXAMO0410 is the right part because the 0802 does not output voltage. Mixing the two on the same rack is normal in process applications.
Compatible Components and Common Pairings
A BMXAMO0802 is rarely ordered alone; the typical M340 spare-parts list also covers:
- CPUs: BMXP341000, BMXP342020, BMXP3420302 — M340 processors that scan analog at the rates the AMO0802 supports
- Power supplies: BMXCPS2000, BMXCPS3500 (24 VDC) or BMXCPS3020 (24 VDC) for the rack 5 V bus
- Analog input pair: BMXART0814, BMXAMI0410 for closed-loop control where the AMO0802 drives the valve
- Backplane: BMXXBP0400, BMXXBP0600, BMXXBP0800, BMXXBP1200 racks
- Wiring: BMXFTA terminal blocks, BMXFCC pre-wired cables to telefast bases for industrial wiring
Common Use Cases
- Multi-loop process control where a single M340 rack drives 8 current-output devices (positioners, regulators, recorders)
- Replacement of a failed BMXAMO0802 in a brewery, food, or water-treatment cabinet
- OEM machinery with several drives or proportional valves controlled from one PLC
- Retrofit of legacy Quantum or Premium analog output cards to a consolidated M340 design
Why Buy the BMXAMO0802 from Rabwellplc
Rabwellplc keeps the BMXAMO0802 in US stock with date-code traceability, and the catalog covers the rest of the M340 family from CPUs to terminal blocks. When an analog output failure exposes wiring or terminal damage, ordering the matching Schneider M340 modules from one supplier shortens the rebuild. For systems where the M340 talks to a Quantum upstream, the catalog also covers the Quantum side, including the 140NOE77111 Ethernet bridge.
Need a BMXAMO0802 with a known date code? Check live stock on the BMXAMO0802 product page and request a quote with your terminal-block preference.
Frequently Asked Questions
What is the difference between the BMXAMO0802 and the BMXAMO0410?
The 0802 has 8 channels and outputs current only (0-20 mA, 4-20 mA). The 0410 has 4 channels and supports both voltage and current. Choose the 0802 for high-density current loops and the 0410 when voltage outputs are required.
Does the BMXAMO0802 require external 24 VDC?
Yes. The output stage is powered by an external 24 VDC supply wired to the front terminal block. Plan rack power so the 24 VDC bus has enough headroom for all output channels at full load.
Is the BMXAMO0802 compatible with Modicon M580?
Yes, the BMX series analog modules including the AMO0802 are reusable on M580 racks via the same BMXXBP backplanes. Verify the firmware compatibility matrix in your EcoStruxure Control Expert version before reusing the module.
Can the BMXAMO0802 channels be configured independently?
Yes. Each channel can be set to 0-20 mA or 4-20 mA in software, with per-channel diagnostics. The module is well suited to mixed-loop racks where each output drives a different actuator type.
What terminal block does the BMXAMO0802 use?
A 28-pin FCN-style connector. Schneider offers BMXFTA screw and spring-clamp terminal blocks, plus pre-wired BMXFCC cables to telefast bases for cabinet builds.