Aim-TTI CPX400S, Instruction Manual

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15
Remote Analogue Control (CPX400SA only)
Remote analogue control of output voltage and current is possible using variable external control
voltages applied between the rear panel CV or CC and Return (RTN) inputs respectively. These
inputs are isolated from the output; the isolation rating with respect to the output is 300V max.
Inputs are protected against excess input voltages of up to 60V.
The Analogue Out control voltages V
out
and I
out
of one unit acting as a ‘master’ can be used to
control a ‘slave’ unit via the slave’s CV and CC inputs respectively.
Analogue Voltage Control
Remote analogue voltage control is achieved by setting the rear panel CV switch to Remote and
applying a programming voltage between the inputs CV and RTN.
The front panel VOLTAGE controls and voltage range selection are disabled when Remote is set
on the CV switch. Set the switch to Local to return control to the front panel.
The default input voltage scaling is 0V to 5V for 0 to 100% of the maximum output voltage. The
input voltage scaling can be changed to be 0V to 10V by changing an internal shorting link.
Disconnect the instrument from the AC source and remove the cover as follows. Remove the two
plastic push-rivets at each side edge of the top cover. Use the blade of a small screwdriver to first
ease out the rivet head and then fully remove the rivet body. Remove the three rear panel screws
securing the top cover; slide the cover back and lift off.
Referring to the top view of the instrument shown in the drawing, move the tall shorting link in
position LK1 to link centre and '10V' pins instead of centre and '5V' pins.
Remote CV can be used with either Local or Remote CC.
Analogue Current Control
Remote analogue constant current control is achieved by setting the rear panel CC switch to
Remote and applying a programming voltage between the inputs CC and RTN.
The front panel CURRENT control and current range selection are disabled when Remote is set on
the CC switch. Set the switch to Local to return control to the front panel.