Omron takes temperature control to a higher level

With built-in logic and data bank functions, the new E5_N-H temperature controllers from Omron allow, in many applications, complete control systems to be implemented without the need for additional devices such as timers, mini-PLCs or intelligent relays. Not only does this provide cost savings, it also makes the systems easier to design, build, set up and maintain.

Based on the proven design of Omron’s E5_N products, which have established themselves as the world’s best-selling temperature controllers, the new E5_N-H controllers add process control features, including enhanced accuracy, speed and communications options.

One size does not fit all

E5_N-H controllers are available in three sizes: the 1/16 DIN E5CN-H, the 1/8 DIN E5EN-H and the 1/4 DIN E5AN-H. Most features are common to all models, but the larger size of the E5EN-H and E5AN-H allows them to accommodate a three-line display and to provide additional I/O terminals.

Set up and programming for the advanced features of the new controllers is easily carried out using Omron’s CX-Thermo software, a Windows-based package that runs on a PC. This provides full access to all of the controller’s functions, and even allows libraries of functions to be built, which can be transferred between controllers as an aid to rapid configuration.

The new E5_N-H controllers incorporate eight “work bits”. These can be programmed to perform simple logic operations, with or without time delays, using, for example, the status of alarms, the SP ramp or the controller’s digital inputs. The work bits can be used to control the operation of E5_N-H unit itself, and of its outputs.

As well as the work bits, E5_N-H temperature controllers have eight internal data banks that can be used to store operational parameters such as PID and alarm settings, set values and soak times. These banks can be used to hold “recipes” relating, for example, to different products, which can then be easily selected by the user. Alternatively, the data banks can be linked to provide the functionality of an SV programmer.

New features

Additional enhancements offered by the new E5_N-H temperature controllers include a fast input sampling time of 60mS, an input accuracy of 0.1% PV and an output resolution greater than 10,000. Taken together, these features ensure precise control in even the most demanding of applications.

The new controllers are also exceptionally versatile, with just one version needed to cover Pt, thermocouple, current and voltage inputs. The output modules are also interchangeable, allowing users to select electromechanical relay, solid-state relay, pulse, voltage or current types according to their requirements.

For maximum user convenience, all models in the E5_N-H incorporate a five-digit eleven-segment colour-change display. The E5CN-H has a two-line display, while the E5EN-H and E5AN-H have three-line displays. Products in the E5_N-H series offer up to four digital event inputs and a wide range of digital communication options, including Modbus. They E5EN-H and E5AN-H also support programming via a front-mounted infrared port, as well as remote set point and transfer facilities.