Product Details

MODICON AS-BDAU-208 is an 8-channel analog output module built for Modicon Micro PLC platforms, functioning as a precise signal controller and voltage driver to convert digital commands from the PLC CPU into continuous analog voltage signals for field instruments. This analog output module generates standard +10V analog signals to drive proportional valves, variable speed actuators, control positioners and display meters in closed-loop process regulation. It communicates with the rack CPU through the dedicated backplane bus, receiving digital setpoint values and refreshing each channel output cyclically to maintain stable process variables. It adopts 11-bit digital-to-analog conversion to deliver smooth, high-resolution analog output and minimize signal jitter during dynamic adjustment. Individual channel protection prevents damage caused by short-circuit wiring or unexpected overvoltage on field loops. LED indicators on the front panel show module power status, bus communication health and channel fault alarms, helping maintenance technicians quickly locate faulty wiring or channel failures on site. Built-in EMI filtering and transient surge suppression circuits protect analog output channels from electromagnetic interference generated by inverters, contactors and heavy power cables inside control cabinets. Configuration of channel scaling and fault response is completed through Modicon programming software. As an obsolete industrial spare part, this analog output module is widely used for repair and retrofit of legacy Modicon Micro automation racks. Direct drop-in replacement keeps original field wiring, scaling parameters and control logic unchanged, reducing commissioning work and cutting production downtime.

Basic Parameters

Product type: analog output module

Part number: AS-BDAU-208

Brand: Modicon, Schneider Electric

Channel count: 8 independent analog output channels

Output signal: +10 V voltage output

Conversion resolution: 11-bit DAC

Compatible series: Modicon Micro 512 / 612 PLC

Interface: Modicon dedicated rack backplane

Channel protection: short-circuit and overvoltage protection

Mounting: single slot plug-in rack installation

Cooling: natural convection

Operating temperature: 0°C ~ +60°C

Protection grade: IP20

Supported Functions

Digital to analog conversion for 8 separate voltage channels

Cyclic analog output refresh following PLC setpoint commands

Backplane high-speed data exchange with host CPU

Short-circuit and overvoltage protection for each output loop

Module self-diagnosis and channel fault status indication

Noise filtering and surge suppression for analog signal wiring

Core Functions

Serve as a reliable analog output module for legacy process control

Visual LED indication for fast module and channel troubleshooting

Act as an accurate signal controller for proportional field devices

Work as a stable voltage driver for closed-loop regulation equipment

Modular I/O expansion for Modicon Micro PLC automation racks

Deliver continuous analog control for critical industrial production loops

Hardware Specifications & Environmental Features

Circuit design: integrated EMI filter and channel protection circuit

Storage temperature: -25°C ~ +70°C

Relative humidity: 5% to 95% non-condensing

Condition: obsolete original spare part, available stock

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm Modicon Micro rack compatibility, output load requirement and channel scaling setup before ordering.

This is from our current stock.

available stock.xlsx