Integrator note — channel assignment and isolation
The BMXAMO0410 is a 4-channel isolated analog output module for the Modicon X80 rack. Each channel is configurable for current (0...20 mA or 4...20 mA) or voltage (+/- 10 V) outputs, with isolation between channels, between channels and ground (1400 V DC), and between channels and bus (1400 V DC). Conversion completes in ≤1 ms, supporting loop update rates typical of process and motion applications.
Accuracy and stability
Full-scale measurement error is 0.1 % at 25 °C, with temperature drift held to 45 ppm/°C across both current and voltage ranges. Common-mode rejection is 100 dB, and crosstalk attenuation between channels stays above 80 dB — figures that matter when the module drives multiple loops in electrically noisy cabinets. Resolution is 15 bits plus sign, with a maximum conversion value of 0...21 mA or +/-10.5 V.
Diagnostics and fallback
Each channel has a green diagnostic LED; a shared red I/O fault LED covers module-level errors. Open-wire detection is built in for current loops, and short-circuit detection for voltage outputs. Fallback mode is configurable to a predefined value — useful for holding a safe state during bus interruption. The module draws power from the rack backplane (150 mA at 3.3 V DC, 140 mA at 24 V DC), so no separate supply wiring.