Schneider Electric BMXAMO0802H Modicon X80 Analog Output Module

Configured for analog current signal generation in Modicon X80 I/O architectures, the Schneider Electric BMXAMO0802H (BMXAMO0802H analog output module) provides 8 non-isolated 0-20 mA or 4-20 mA output channels through the rack power and backplane interface. The module provides 16-bit resolution, conversion time of <= 4 ms, and configurable fallback behavior.

Hardware Specifications

Modicon X80 Backplane and Analog Signal Characteristics

The BMXAMO0802H receives its internal supply through the Modicon X80 rack and exchanges I/O data through the rack backplane. The eight output channels generate either 0-20 mA or 4-20 mA current signals with 16-bit resolution. Each channel is non-isolated from the other output channels at the signal interface.

The specified load impedance is <= 350 Ohm for both current ranges. The module provides a minimum 80 dB crosstalk attenuation and 80 dB common mode rejection. Open-circuit detection applies to the 4-20 mA range, while short-circuit detection applies to the 0-20 mA range. Output conversion time is <= 4 ms.

The H suffix identifies the ruggedized version with conformal coating and an extended operating range of -25 to 70 deg C. The module is intended for installation in compatible Modicon X80 racks used with Modicon M340 and M580 controllers.

Frequently Asked Questions

Q: Is the BMXAMO0802H output channel interface isolated?

A: No. The eight analog output channels are specified as non-isolated. The module nevertheless specifies 1400 VDC isolation between channels and ground and between channels and the bus.

Q: What current ranges can the BMXAMO0802H generate?

A: Each analog output supports 0-20 mA and 4-20 mA current operation. The maximum conversion value is specified as 0-21 mA for both configured ranges.

Q: How is the module powered in an X80 system?

A: The module receives its internal power through the Modicon X80 rack. Specified consumption is 3.6 W typical and 3.9 W maximum at 24 VDC.

Field Installation Guidelines

Install the BMXAMO0802H on the designated Modicon X80 rack position and secure the module with the specified two mounting screws. Verify that the rack and removable 20-way terminal connection are correctly seated before energizing the system.

Route analog current wiring separately from high-voltage power conductors and high-current switching circuits where practical. Use appropriate shielded instrumentation cable when required by the installation environment. Terminate cable shields according to the plant grounding scheme and avoid creating unintended ground loops.

Verify that each connected load remains within the specified <= 350 Ohm impedance. For 4-20 mA circuits, check loop continuity before enabling the output. Confirm channel configuration, fallback behavior, and output range in the controller configuration before placing the channel into service.

The BMXAMO0802H is IP20 and is intended for installation inside a suitable enclosure. The conformal-coated H version supports the specified -25 to 70 deg C operating range and environmental resistance characteristics stated by the manufacturer.