Description

The 1734-OE2CK is a specialized 2-channel analog current output module belonging to the Allen-Bradley POINT I/O system (part of Rockwell Automation). The suffix “K” indicates that this module features a conformal coating, providing enhanced protection against corrosion, humidity, and harsh industrial contaminants, making it ideal for demanding environments like wastewater treatment, offshore platforms, and chemical processing.

This module converts digital control signals from a Logix controller (e.g., ControlLogix, CompactLogix) into precise 4-20 mA or 0-20 mA analog current signals to drive field devices such as control valves, positioners, variable frequency drives (VFDs), and electropneumatic transducers. It connects via a DeviceNet or EtherNet/IP adapter (like the 1734-ADN or 1734-AENTR) and mounts on a standard DIN rail using the 1734-TB series terminal bases.

Application Scenarios

In a coastal desalination plant, the high salinity and humidity caused frequent failures in standard analog output modules, leading to erratic control of intake valves. The engineering team replaced the corroded units with the 1734-OE2CK. The conformal coating on the 1734-OE2CK successfully shielded the internal circuitry from salt mist, eliminating corrosion-related failures. The module provided stable 4-20mA signals to critical pneumatic actuators, ensuring precise flow control even during extreme weather conditions. Its diagnostic features allowed the central SCADA system to detect open-loop conditions instantly, preventing potential overflow incidents.