Loop Controllers: Lone Logic is More Connected
作者:Mark T. Hoske 发表时间:2005-12-05
ammable automation controller, such as Logix, according to Allen-Bradley offerings from Rockwell Automation. The Bulletin 900 line, in 1/32, 1/16, and 1/8 DIN form factors, offers multi-function control, easy LED displays, auto-tuning, and self-tuning for higher efficiencies and faster startups. Software is available; upgrades are free within 6 months of purchase. Other options include the 1790/P CompactBlock LDX I/O device with temperature control module. www.rockwellautomation.com Rockwell Au

Low-cost temperature controller

The UDC100 is a low-cost 1/4 DIN, microprocessor-based controller designed for basic temperature applications. A timer is optionally available. A large dial allows easy setpoint adjustment Front face is 96 mm x 96 mm (3.78 in. x 3.78 in.) This controller is used in applications such as processing, bakery ovens, small industrial furnaces, and ceramics kilns. www.honeywell.com/imc Honeywell

Digital indicating controller

Model UT551-xA to xD is an intelligent, micro-processor based digital indicating controller with Ethernet communication functions. It has a large numerical display with an 'Active Color PV Display' color-changing function. Product features many standard functions for various control applications; all functions, such as control, control computation, and signal computation functions, can be configured by using keys on the front panel. The controller has eight types of control strategies, the 'Super' overshoot suppressing function, and 'Super 2' hunting suppressing function, as well as an auto-tuning function. A position-proportional control model is also available. www.yokogawa.com/cis Yokogawa

Temperature control

Series SD family of PID temperature controllers is said to provide an exceptional value to processors through their accuracy and performance in a broad range of applications in temperature and process control. They include an improved user interface display, faster update rates, and expanded I/O capability. Adva