Data Sheet

QS40.241
Q-Series
24V, 40A, SINGLE PHASE INPUT
10. REMOTE CONTROL OF OUTPUT VOLTAGE
The shut-down input can also be used to remotely adjust the output voltage between typically 22Vdc 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
14V
16V
18V
28V
20V
22V
26V
Control Voltage
24V
10V
Potentiometer:
28V setting
24V setting
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 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.
Acquired data:
- Family name of unit (QS40), revision of firmware
- Operational hours
- Expired portion of lifetime (combination of temperature and period of time)
- Maximum ambient temperatures with timestamp (max. 47 values)
- Maximal input voltages with timestamp (max. 47 values) and type of input voltage (AC or DC)
- Failure report (various internal errors)
- Number and timestamp of input overvoltage transients
- Number and timestamp of over-temperature shut-downs
- Number of turn-on sequences
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. Furthermore, data will be acquired every time
shortly before the unit switches off.
Oct. 2014 / Rev. 1.2 DS-QS40.241-EN
All parameters are specified at 24V, 40A, 230Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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