September 2017System Integration & Control Systems Design
Instrument loop problems are frustrating at the best of times and can be really time-consuming affairs to solve. Most of the time, these problems are related to isolation and ground faults. Thankfully, eliminating these problems is now quick and easy with Omniflex’s Omniterm range of DIN-rail mount current loop isolators. Utilising the latest electronic techniques to achieve extremely high accuracy with minimum loop losses and zero field calibration, these modules are designed to isolate instrument current loops from circulating ground currents, thereby preventing system inaccuracies, and at worst, instrument failures.
Features of loop isolators (single LPI and dual LPD):
• No field calibration required.
• Unique loop break protection.
• Extremely low insertion loss to avoid loop overload.
• Operates over 0–50 mA allowing loop errors and overload conditions to be properly detected.
• Suitable for SIL1 applications.
LPI and LPD applications: use the LPI to remove ground current loops in 4-20 mA applications where power is unavailable. LPD is a dual version, incorporating two LPIs in a single 22,5 mm housing, ideal for when space is at a premium.
Features of loop repeaters (LPR) and splitters (LPS):
• Approved 1 kohm load drive capability on repeated current signal, allowing additional instruments to be added to an overloaded loop.
• Isolation on repeated current allows grounded instruments to be added without any worry of creating ground loops.
• Extremely low insertion loss to avoid loop overload.
LPR and LPS applications: the LPR and LPS modules are specifically designed for applications where additional current loop signals are required from an existing current loop, and are designed in such a way that they have minimal effect on the impedance of the existing current loop. Also, use the LPR to increase 4-20 mA drive capability or add additional instruments to an existing current loop. Use the LPS to create two independently isolated current loops from a single input loop or add instruments to an existing current loop.
Omniflex through the decades Omniflex Remote Monitoring Specialists
News
As Omniflex celebrates 60 years of engineering excellence, we take a look back at the decade that saw us really kick in and deliver major engineering projects – the 1970s.
Read more...Remote monitoring in remote and harsh environments Omniflex Remote Monitoring Specialists
Industrial Wireless
For power grids, water supply networks and many industrial facilities, managing infrastructure in remote locations is a significant challenge. Omniflex discusses the requirements for remote monitoring equipment deployed in remote and harsh environments, and shares an example from the company’s work with a South African electricity supply company.
Read more...Plant to control room visibility Omniflex Remote Monitoring Specialists
Industrial Wireless
When Sasol’s Secunda power plant in South Africa was looking for ways to improve productivity and maintenance responsiveness, it approached remote monitoring experts, Omniflex for real-time monitoring of its electrostatic precipitators across 17 substations.
Read more...Digital transformation from the edge DirectLogic Automation
System Integration & Control Systems Design
Edge-enabled PLCs are an accessible and affordable way for most users to collect and create value from use field-sourced data.
Read more...Upgrading Australia’s first switch-mode CP installation Omniflex Remote Monitoring Specialists
Industrial Wireless
Omniflex has completed a system upgrade for the switch-mode cathodic protection system installation protecting a premium residential precinct in Melbourne, upgrading its remote monitoring with 4G connectivity
Read more...Novel closed-loop CP technology wins innovation award Omniflex Remote Monitoring Specialists
Industrial Wireless
Researchers at Deakin University have won the Corrosion Innovation of the Year Award at this year’s AMPP Annual Conference and Expo in Nashville, USA. The award recognised the development of a novel closed-loop cathodic protection system for localised corrosion control in challenging industrial environments, which Omniflex helped with as a technology partner.
Read more...Powering southern Africa’s industrial evolution for over five decades Oilpower
System Integration & Control Systems Design
Established in 1974, Oilpower is a recognised name in South Africa’s hydraulic and pneumatic sector. What started as a small, family-run business has matured into a highly structured operation with specialised teams, experienced engineers and a reputation for technical excellence and reliability. Oilpower is celebrating its 50th anniversary this year
Read more...Improved networking technology for fire and gas detection Omniflex Remote Monitoring Specialists
Fieldbus & Industrial Networking
Critical alarm and event management technology supplier, Omniflex has worked with the South African Nuclear Energy Corporation to upgrade equipment providing digital and analogue signals for its safety critical fire and gas alarm systems.
Read more...Metal plant automation upgrade ABB South Africa
System Integration & Control Systems Design
A combined compressor house (CCH) control system replacement project, undertaken by NJC, an ABB Authorised Value Provider (AVP), has won high praise from client ArcelorMittal.
Read more...Novel closed-loop CP technology for corrosion control Omniflex Remote Monitoring Specialists
Industrial Wireless
Cathodic protection specialist, Omniflex has collaborated with researchers at Deakin University to develop corrosion monitoring electronics for a novel closed-loop cathodic protection system for localised corrosion control in challenging industrial environments.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version