Product category:
Industrial Drives/Controls
News Release from: Stroud Instruments | Subject: 112-65s
Edited by the Engineeringtalk Editorial
Team on 18 February 2004
Analogue controller provides ramp or
setpoint
The 112-65s is a novel instrument that provides a time-controlled analogue signal as a ramp or setpoint function.
The 112-65s is a novel instrument that provides a time-controlled analogue signal as a ramp or setpoint function Applications include computer control of laboratory processes, temperature cycling, load, valve and position control, and PID controller set-point control
This article was originally published on Engineeringtalk on 7 Jan 2004 at 8.00am (UK)
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Control of the output signal is provided by three inputs: start/raise, stop/lower and reset.
Output signal rise and fall times are user selectable by internal switches.
All other functions which include input signal polarity, output maximum, minimum and initial values etc are factory programmed or may be reprogrammed by the user with optional PC software.
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Input signal types may be specified for either voltage, current, open-collector or volt-free contacts.
Output signal options available cover all common process signals.
In ramp generator mode the ramp is started and stopped by momentary contact closure or voltage/current pulse start and stop signals.
The stop signal halts the ramp and holds the output at the current value.
The response to simultaneous start and stop signals may be set to perform "no action" or start, stop or reset the ramp.
Post reset action may be set to either restart the ramp or to take no further action.
The active states of input signals are individually programmable ("normal" or "reversed").
Four ramp-type outputs are supported, each of which may be set to generate a single period waveform or, using the repeat option, a continuous waveform.
Other options enable the ramp to start when power is applied and set maximum and minimum values of the ramp signal (range 0-102.3% of full scale).
In raise-lower (setpoint) mode, while the raise input signal is present the output rises up to the maximum (setpoint) value.
Similarly when the lower input signal is active, the output falls to the minimum (setpoint) value.
With no raise or lower signals the output is held at the current value.
The response to simultaneous raise and lower input signals may be set to raise, lower or reset the output signal or to take no action.
The active states of input signals are individually programmable ("normal" or "reversed").
The initial value of the output (ie output after the instrument is powered up or after a reset) and the maximum and minimum values of the output signal may be set within the range 0-102.3% of full scale.
For manually activated inputs, the initial value of the output may alternatively be set to the last value present on the output before powering down (ie when turned off, the instrument memorises the last value output even after a power failure).
A test mode is also provided which enable the generation of a range of output signals for commissioning and maintenance purposes.
Universal mains power is provided as standard with the instrument able to operate from a supply in the range 85-265V AC.
Optional 12 and 24V DC powered versions are also available.
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