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...The six pillars of hydraulic system health Hydrasales
Pneumatics & Hydraulics
Hydrasales, a leader in hydraulic and lube oil industry solutions, offers an extensive range of condition monitoring products designed to safeguard your systems. Here are six essential checks for hydraulic system health to keep your systems in optimal shape.
Read more...Five tech trends shaping business in 2025
Information Security Infrastructure
From runaway IT costs to the urgent need for comprehensive AI strategies that drive sustainable business impact, executives must be prepared to navigate a complex and evolving technology environment to extract maximum value from their investments.
Read more...Threats, opportunities and the need for post-quantum cryptography
AI & Data Analytics Infrastructure
The opportunities offered by quantum computing are equalled by the threats this advanced computer science introduces. The evolution of quantum computing jeopardises the security of any data available in the digital space.
Read more...Compressed air preparation Artic Driers International
Pneumatics & Hydraulics
The choice of compressed air dryers is driven by the air quality demands of your plant.
Read more...Navigating today’s cloud security challenges
Information Security Infrastructure
While the cloud certainly enables enterprises to quickly adapt to today’s evolving demands, it also introduces unique challenges that security teams must recognise and manage. Vincent Hwang offers insights from the 2025 State of Cloud Security Report.
Read more...Identity is a cyber issue
Access Control & Identity Management Information Security
Identity and access management telemetry has emerged as the most common source of early threat detection, responsible for seven of the top 10 indicators of compromise leading to security investigations.
Read more...The rise of autonomous data recovery
Information Security Infrastructure
Escalating cyberthreats and attacks constantly put businesses under pressure, increasingly prompting organisations to shift their mindsets towards ensuring continuous operations and thus avoiding downtime and revenue loss.
Read more...Identity and authentication Technews Publishing SMART Security Solutions
Access Control & Identity Management Information Security Security Services & Risk Management
Identity authentication is a crucial aspect of both physical security and cybersecurity. SMART Security Solutions obtained insights into the topic and the latest developments from three companies.
printer friendly version