Sixnet ST-AO-20M-08 Analog Output Module

Sixnet ST-AO-20M-08 Analog Output Module is an eight-channel analog output module in the SixTrak family, designed to plug into Sixnet's ST-Bus backplane. It provides eight current-output channels with a per-channel capability of up to 20 mA and a maximum load voltage of 30 VDC, making it suitable for driving analog process instrumentation and actuators in industrial control systems. The model is identified as ST-AO-20M-08 and is described by the manufacturer as Six Trak; dimensions are 4.5 inches long, 1.5 inches wide, and 4.0 inches tall, yielding a compact footprint for cabinet installations. This particular variant is listed as discontinued by the manufacturer, so it may appear in refurbished or surplus inventories. In legacy Sixnet deployments now associated with Red Lion Controls, the ST-AO-20M-08 family remains a reference point for eight-channel analog output capability. Typical applications include converting digital controller outputs into analog signals to drive valves, transducers, and other instrumentation that accepts loop-powered current signals, enabling straightforward integration with common 4-20 mA loop equipment and legacy process-control architectures.