Datasheet

QT40.241
Q-Series
24V, 40A, THREE PHASE INPUT
10. REMOTE CONTROL OF OUTPUT VOLTAGE
The shut-down input can also be used to remotely adjust the output voltage between typically 14Vdc and 28Vdc. All
other functions of shut-down input remain the same.
The control voltage is referenced to the main ground (negative output voltage)
Fig. 10-1 Remote control of the output
voltage
Fig. 10-2 Applying the control voltage
Output Voltage
12V
0V 5V 15V
14V
16V
18V
28V
20V
22V
26V
Control Voltage
24V
10V 20V
Potentiometer:
set to 28V
set to 24V
15
16
Control
Voltage
Shut-
down
Input
-
+
n.c.
Instructions:
1. Set the unit into “Single Use” mode
2. Set the output voltage adjustment (24-28V) to the maximum desired voltage.
3. Apply a control voltage to reduce the output voltage
11. INTERNAL DATA LOGGING
A protected microcontroller inside the power supply acquires and stores operating data during the life of the unit. The
data can be downloaded with a small tool and a special software by the PULS service and repair personnel, even when
the unit is defect. The data allows for better troubleshooting. Analysis of what happened before a failure can be
determined much more accurately.
The data will be acquired with a fixed sampling rate unless the peak detectors do trigger due to an abnormal
condition. In such cases, the abnormal condition will be captured.
Acquired data:
- Family name of unit (QT40), revision of firmware
- Operational hours and expired portion of lifetime
- Operational data; latest 60 values with timestamps of the last 158 minutes of:
Number of over-voltage transients,
Average input voltage,
Peak input voltage,
Inside temperature,
Overloads > 2s,
Missing of one input phase (minimum output load required)
- Failure data; various errors such as:
Internal errors,
Over-temperature shut-down,
OVP,
Long-term overloads,
Remarkable temperatures inside the unit,
….
- Number of turn-on sequences and overvoltage transients
Nov. 2012 / Rev. 2.0 DS-QT40.241-EN
All parameters are specified at 24V, 40A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone [phone] Germany
10/27