Single-channel analogue output for FX1N backplane
The Mitsubishi FX3G-1DA-BD is a single-channel analogue output module that mounts directly onto the MELSEC FX1N series PLC backplane. It provides one configurable output channel supporting either a 4-20 mA current loop or a 0-10 VDC voltage signal, giving you the flexibility to drive analogue actuators, valve positioners, or VFD speed references from a single point. With only one I/O point, this module is sized for applications needing exactly one analogue output — no wasted channels, no unused terminals. The 4-20 mA loop is the industrial standard for noise-immune signal transmission over longer distances, while the 0-10 VDC range suits local panel connections to drives or displays.
What the output ratings mean for your control loop
The 4-20 mA output means the module drives a current loop where 4 mA represents the zero-scale value and 20 mA represents full scale. This is the preferred signalling method in plants with electrical noise or long cable runs — the loop is inherently less susceptible to voltage drop and induced interference than a voltage signal. The 0-10 VDC output, by contrast, is simpler to scale in software and works directly with many VFDs and panel meters that accept a voltage reference. Because the module offers both output types on a single channel, you select the range that matches your field device. There is no need for external signal converters or isolators for basic compatibility — the choice is made at configuration time, not with jumpers or add-on boards.
This module snaps onto the FX1N series PLC base unit or expansion bus, occupying the space of a single expansion module. No external power supply is needed — it draws its operating power from the PLC backplane. The terminal block accepts standard analogue cabling; shield grounding at the panel end is recommended for the 4-20 mA loop to keep common-mode noise out of the analogue input card.