Connections - TTI QPX600D Instruction Manual

Rear Panel Connections
Output Terminals (each output)
The load should be connected to the positive (red) and negative (black) terminals marked
OUTPUT. The terminals accept 4mm plugs into the end (but note that 4mm plugs will only support
30 Amps), 6mm diameter wire or plugs into the cross-hole or 8mm spade connections (with a
maximum blade width of 16mm). The wiring and connectors must be capable of supporting the
current required; for 50 Amps, 6mm
Remote sense connections to the load, if required, are made from the positive (+) and
negative (−) REMOTE SENSE terminals. Remote sense operation is selected from the keyboard
or via a remote control interface; R/SNS (Remote Sense) shows in the display beside the output
status ( OFF, CV, CI or UNREG ) when remote sense is selected and goes off when remote
sense is deselected.
The M4 threaded opening marked
Warning! Voltages above 70Vdc are hazardous live according to EN 61010-1 and great care must
be taken when using the power supply at voltages above this level.
Always ensure that connections to the terminals are only made in a manner that does not
compromise the protection provided by the terminals themselves.
Ensure that the contact parts of all connecting wires are fully inserted and inaccessible to the touch.
Always make connections to the instrument with the OUTPUT off.
Logic Input (each output)
LOGIC IN is connected directly to the input of an isolating opto-coupler; there is no series resistor.
The input is activated when a current greater than approximately 1mA is forced between LOGIC IN
and LOGIC COMMON. The function of LOGIC IN is set from the keyboard.
Do not force a current exceeding 25mA between the terminals. Do not apply a voltage to LOGIC
IN / LOGIC COMMON exceeding 50V with respect to
Logic Output (each output)
LOGIC OUT is the open-collector output of an opto-isolated NPN transistor that will sink up to 2mA
when active ('switch closure'). The function of LOGIC OUT is set from the keyboard.
The maximum voltage that can be applied between LOGIC OUT and LOGIC COMmon is 30VDC.
Do not apply external voltages between the terminals exceeding 30VDC.
Analogue Control (each output)
V CONTROL and I CONTROL inputs provide quasi-analogue control of the Output Voltage and
Current Limit respectively. The inputs are read 4 times per second by the A-to-D converter and the
output is set according to the selected input scaling. The input scaling for both can be set as 0 to
10 Volts or 0 to 5 Volts for range maximum output. The Analogue Control functions and scaling are
both selected from the keyboard.
The V CONTROL and I CONTROL inputs are differential, with a limited common mode range of
± 2.5Vdc with respect to the negative output. They should be driven from a 'floating' source such
as another power supply.
Do not apply external voltages between the terminals exceeding 20Vdc.
2
cable is needed.
provides a connection point to safety earth ground.
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Connections

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