July 2004Pneumatics & Hydraulics
Information Security
Infrastructure
Interfacing to hydraulic valves is generally never simple. To make things a little easier, Danntech has designed a multipurpose hydraulic valve interface module with a variety of inputs, various outputs with an adjustable ramping up and down functions with times up to 100 seconds.
Various inputs can be accommodated such as resistance - 0 to 100 Ω minimum up to 0 to 10 kΩ maximum (joystick or potentiometer), currents from 0 to 20 mA, 4 to 20 mA or anything from 1 mA up to 500 mA DC, voltages from 0 to 10 V, 25% to 75% or anything from 100 mV up to 100 V d.c. (Specifically the Danfoss valves and joysticks can be used). Outputs can be current - anything from 0 to 500 mA typically 4 to 20 mA, 0 to 85 mA, 0 to 480 mA or voltage - 0 to 10 V or 25% to 75%.
The output can only be monopolar - for example 0 to 200 mA (not -200 mA to +200 mA) and is not isolated from the power supply or the input. (Another type of unit can be supplied with galvanic isolation between input and output). The output shares a common 0V connection with input supply.
The unit can be used for soft-start applications with internal setpoint control using an internal trimpot or external resistance control. The setpoint determines the maximum output value or the output control value so the unit can be used as a signal converter with inputs of 4 to 20 mA, 0 to 10 V or 25% to 75% and outputs either 4 to 20 mA, 0 to 10 V or 25% to 75%. The converter will inherently include the ramping functions. The ramp ranges are set internally in the following ranges - 0 to 1 second, 0 to 10 seconds, 0 to 50 seconds and 0 to 100 seconds. Different ranges can be used for ramping up and ramping down with the trimpots used to adjust from 0 to 100% of the range internally selected. The unit occupies only 25 mm of space on a DIN rail and can be powered via either 12 V or 24 V d.c. Being microprocessor-based, the unit can be adapted for special functions if required.
For more information contact Melanie, Danntech, 011 792 1239, www.danntech.co.za
Read more...Identifying signs of hydraulic cylinder wear and tear CT Hydraulics (Nqoba)
Pneumatics & Hydraulics
Recognising the early warning signs of hydraulic cylinder degradation is crucial for preventing costly downtime, ensuring operator safety and maximising the lifespan of your hydraulic systems.
Read more...Integrated Air Solutions opens Pinetown branch
Pneumatics & Hydraulics
Integrated Air Solutions has opened a branch in Pinetown, bringing world-class diesel and electric air compressor services closer to customers in KwaZulu-Natal.
Read more...Cartridge-style flowmeter Axiom Hydraulics
Pneumatics & Hydraulics
Sun’s new cartridge-style flowmeter QMEH delivers precise, real-time flow measurements for demanding hydraulic applications. Using a custom-built, state-of-the-art sensor, the QMEH accurately detects flow and converts the electrical signal into a proportional flow rate.
Read more...AI-enabled NVR for Milestone XProtect
Surveillance Infrastructure Products & Solutions
As surveillance environments continue to grow in scale and complexity, organisations need infrastructure that is easy to deploy, simple to manage, and ready for AI-driven workloads.
Read more...71% of organisations suffered an identity breach
News & Events Information Security
The State of Identity Security 2026 report from Sophos finds human error and poor non-human identity management are the root causes of most attacks, as agentic AI accelerates the risk.
Read more...Industry perspective on industrial cybersecurity Technews Publishing
News & Events Infrastructure Industrial (Industry)
The Industrial Security Harmonization Group has released a joint industry perspective highlighting a critical truth in industrial cybersecurity: secure communication is not determined by protocols alone, but by how they are deployed and managed in real-world environments.
Read more...Cyber resilience is the real defence
Security Services & Risk Management Information Security Infrastructure
Cyber resilience has evolved into a form of strategic agility, ensuring that when an interruption occurs, the business does not just survive; it snaps back into place before the market even notices a pause.
Read more...Employees are SA’s biggest cyber threat
Security Services & Risk Management Information Security
South Africa experienced a 46% increase in insider cyber risk in 2026, surpassing the global average of 44%. What is more, 63% of South African companies surveyed expect insider-driven data losses to increase.
Read more...Power, performance and profit
Power Management Infrastructure
Electricity remains the single largest operating cost for most data centres. In many African markets, power infrastructure is ageing or inconsistent, forcing operators to rely on backup generation to keep facilities online.
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