Technical data, mounting, wiring
PS3031-2440-0000
17
Version: 1.0
3.7
Shutdown input
The shutdown input allows the output of the power supply to be switched off by means of a signal switch or
external voltage.
• The shutdown takes place without delay, while switching on is delayed by up to 350 ms.
• When switched off, the output voltage is less than 2 V and the output power is less than 0.5 W.
• When units are connected in parallel, the voltage difference between the various negative output
terminals must be less than 1 V.
• When operating several power supplies in series, only wiring option "A" with single signal switches is
permitted.
Information regarding the use of the shutdown input
Please note the following:
• Option C (see diagram below) requires current reduction capability of the voltage source. Do not
use a blocking diode!
• The shutdown function does not include any safety functionality.
Fig. 10: Activation of the shutdown input
3.8
Output voltage control
The shutdown input can also be used to remotely adjust the output voltage between typically 22 Vdc and
28 Vdc. All other functions of the shutdown input remain the same.
The control voltage is relative to the ground (negative output voltage).
Fig. 11: Remote control of the output voltage; applying the control voltage
Instructions:
1. Set the device to "Single Use" mode.
2. Set the output voltage (24-28 V) to the maximum required voltage.
3. Apply a control voltage to reduce the output voltage.
