Description

The A1S68DAV is a high-density, 8-channel analog output module designed for the Mitsubishi Electric MELSEC-A Series of programmable logic controllers (PLCs). This specialized module serves as a critical interface between the digital control world of the PLC and the analog actuation devices in the field, converting digital values written by the CPU into precise analog voltage or current signals. The primary function of the Mitsubishi A1S68DAV is to command and regulate final control elements such as proportional valves, variable frequency drives (VFDs), servo controllers, and electronic pressure regulators, enabling precise control over process variables like speed, flow, pressure, and position. As part of the extensive MELSEC-A I/O system, it is engineered for reliability and accuracy in demanding industrial environments. The module’s high channel count allows for a significant reduction in cabinet space and cost per point compared to using multiple lower-channel modules, making it an efficient and powerful solution for complex automation systems requiring extensive analog control.

A1S68DAV MITSUBISHI

Technical Specifications

Parameter Name	Parameter Value
Product Model	A1S68DAV
Manufacturer	Mitsubishi Electric
Product Type	Analog Output Module
Number of Channels	8
Output Signal	Voltage: 0 to ±10 V DC (External load resistance: 2 kΩ to 1 MΩ) / Current: 4 to 20 mA DC (External load resistance: 0 to 600 Ω)
Digital Input	16-bit signed binary (for voltage: -4096 to +4095, for current: 0 to +4095)
Resolution	1/4000 (12-bit plus sign)
Accuracy	±0.5% (of full scale) for voltage output, ±0.5% (of full scale) for current output
Conversion Speed	2 ms/channel (8 channels require 16 ms)
Isolation	Photocoupler isolation between analog circuits and PLC internal circuits
Power Consumption	5 V DC, 0.35 A (supplied from the base unit’s backplane)
Operating Temperature	0°C to 55°C

Main Features and Advantages

The Mitsubishi A1S68DAV module offers a compelling set of features centered on precision, flexibility, and ease of use. Its most significant advantage is the high channel density, which consolidates control of eight analog devices into a single module slot, optimizing control cabinet layout and reducing overall system cost. Each channel can be individually configured for either voltage or current output, providing exceptional flexibility to interface with a wide array of actuators without being locked into a single signal type. The 16-bit resolution ensures fine-grained control, allowing for smooth and precise manipulation of process variables, which is essential for applications requiring high-quality regulation.

The module incorporates high noise immunity through photocoupler isolation, protecting the sensitive internal electronics of the PLC from electrical noise commonly found on factory floors, such as that generated by motor drives and welding equipment. This ensures stable and accurate signal output, which is critical for process consistency and product quality. Configuration and scaling are straightforwardly handled through the GX Developer programming software, allowing engineers to easily set the output range and scaling parameters for each channel. The A1S68DAV also features a transparent design with helpful LED indicators for monitoring the operational status, facilitating quick diagnostics and simplifying maintenance procedures.

Application Field

The A1S68DAV is deployed in a vast range of industrial automation applications where precise analog command signals are required. In the chemical and petrochemical industries, it is used to control the opening of proportional valves for precise dosing and flow control of raw materials. In automotive manufacturing, it commands the speed of variable frequency drives on conveyor systems and controls the pressure in robotic clamping circuits. Plastic injection molding machines utilize this module to regulate barrel backpressure and hydraulic pressure via proportional pressure valves.

It is also essential in water and wastewater treatment plants for controlling the speed of pumps and the position of flow control valves. In HVAC systems for large buildings, the A1S68DAV can modulate damper actuators and control fan speeds. Food and beverage production lines use it for analog control in blending and mixing processes. Essentially, any MELSEC-A controlled system that requires stable, multi-point analog output for continuous process control is a prime application for the Mitsubishi A1S68DAV module.

A1S68DAV MITSUBISHI

Related Products

A1S68AD: An 8-channel analog input module, the complementary partner to the A1S68DAV for reading process sensors.

A1S62DA: A 2-channel analog output module for applications requiring fewer points.

A1S64AD: A 4-channel analog input module.

A1SCPU: A typical MELSEC-A Series CPU module (e.g., A1SCPU, A1SJCPU) that commands the A1S68DAV.

A1S35B / A1S38B: 5-slot and 8-slot main base units to house the CPU and I/O modules.

A1S61PN: The standard power supply module required for the base unit.

GX Developer: The Mitsubishi software used to configure and program the module.