Product Overview

The Reliance Electric 586-501-109​ is a genuine factory-defined spare part from the Reliance Electric industrial automation portfolio, supplied in the trade as a programmable temperature transmitter and signal conditioning module for legacy process and drive control systems. Reliance Electric, whose control and drive lines passed to Rockwell Automation and subsequently to Baldor Electric, built a vast installed base of DC drives, AC drives and distributed control hardware, and part numbers of this 586-series form the index by which maintenance teams identify the exact field-replaceable unit inside that equipment.Functionally, the Reliance Electric 586-501-109​ converts a low-level temperature sensor signal — from a thermocouple or an RTD — into a standardised 4-20 mA current loop that a PLC analogue input card, a drive regulator board or a DCS I/O channel can read directly. The 4-20 mA standard is chosen because it is largely immune to voltage drop over long cable runs and because a reading below 4 mA immediately signals a broken loop rather than a valid low temperature, which is exactly the diagnostic behaviour a process interlock requires.In an automation architecture, the Reliance Electric 586-501-109​ sits at the boundary between the field instrument and the control system. It is the component that makes a bearing temperature, a motor winding temperature or a process temperature visible to the controller that must act on it. Because it is a programmable transmitter, range, sensor type and output scaling are configured to the application rather than fixed at manufacture, which gives maintenance teams the flexibility to reuse the same part number across several measurement points.The Reliance Electric 586-501-109​ is supplied today primarily as new surplus or professionally tested stock, since the host systems it serves have been discontinued. Its value is therefore precise and specific: it is the shortest, most reliable route back to production when a panel-mounted transmitter fails and the alternative is a costly and time-consuming modernisation of an otherwise sound control system.

Technical Specifications

Note: Because this part number is defined by the host equipment rather than sold as a stand-alone catalogue instrument, the electrical variant and configuration must be confirmed against the equipment parts list before ordering.

Main Features and Advantages

Programmable input flexibility: The Reliance Electric 586-501-109​ accepts either a thermocouple or an RTD input, and the sensor type, measuring span and output scaling are configured rather than hard-wired. This means one part number can serve several different temperature points on the same machine — a bearing housing with a platinum RTD, a winding with a thermocouple, an ambient cabinet probe with a third characteristic — which reduces the number of distinct spare part numbers a plant has to hold and simplifies the stocking decision considerably.Standard 4-20 mA output for universal integration: The Reliance Electric 586-501-109​ delivers the industry-standard 4-20 mA current loop, so its output connects directly to practically any PLC analogue input, DCS channel, recorder or drive regulator board without a signal converter. Current loop transmission also tolerates long cable runs in electrically noisy plants without the measurement degradation that a voltage signal would suffer, and the live-zero behaviour at 4 mA means an open circuit reports as a fault rather than as a plausible low reading.Loop-powered simplicity: Because the Reliance Electric 586-501-109​ is powered from the 24 V DC loop itself, two conductors carry both the supply and the signal. There is no separate auxiliary power distribution to design, no additional fuse or terminal to terminate, and no risk of a transmitter being energised while its signal circuit is isolated — a wiring simplicity that matters particularly in retrofit work where spare cores in an existing multicore cable are scarce.Measurement integrity in industrial environments: With span accuracy in the ±0.1 % to ±0.5 % class and a response time of a few seconds, the Reliance Electric 586-501-109​ provides the stable, repeatable measurement that thermal protection and process control depend on. Temperature is a slow variable, so a transmitter that is both accurate and free of drift is worth more than one that is merely fast, since thermal trips and trending analysis both depend on confidence in the absolute value.Wide ambient rating and industrial packaging: Rated for an ambient range of -40 °C to +85 °C, the Reliance Electric 586-501-109​ is at home in unheated outdoor enclosures, in hot mill pulpits and in control rooms alike. Its housing is built for cabinet mounting alongside the drive and control hardware it serves, matching the mechanical and environmental expectations of the original equipment rather than those of a laboratory instrument.Direct part-number replacement value: The decisive advantage of the Reliance Electric 586-501-109​ is that it restores an existing, proven installation without engineering change. When the failed unit on the panel rail carries this number, replacing it with the identical number avoids rewiring, re-ranging, re-validation and the risk that a substitute device behaves differently at the trip threshold — often the difference between a one-hour repair and a one-week project.