SIPLUS PSU (6DL3500-8BA)
SIPLUS PSU Power Supply Unit
A5E00854207E
11 of 30
Copyright (C) Siemens AG 2018
V 8.00 released
2018-05-03
4.4 Switching off the Supply Outputs
Every supply output can be switched on and off manually over a channel switch. This channel switch
switches a Smart-FET-transistor which interrupts the electrical circuit. The state of a supply output is
indicated by the channel LED. Green light signals the "ON" state (toggle switch lever in up position).
Yellow light signals the "OFF" state (toggle switch lever in down position). In the “OFF” state the out-
put is in high-impedance mode.
Not used supply outputs can be inactivated by switching the output off and unplugging the fuse. Inac-
tive outputs are signaled by dark LEDs.
The operating states are described in the chapter 4.7 ”Signaling Scheme” in tabular form.
4.5 Monitoring and Signaling
The fuses are monitored on interruption. The monitoring is only active when the supply output is
switched on (operating state "ON"). A blown fuse is signaled by the channel LED with a red continu-
ous light. In addition an accumulative status signal is output at the signaling outputs MELD (active
HIGH) and MELD_N (active LOW).
Figure 5: Channel set-up
No. Meaning
1) Blade
fuse
2)
Smart-FET-Transistor with electronic monitoring
3) Channel-LED
4) Suppressor-Diode
5) Output
capacitor
6)
Plug for terminal connection
(see chapter 9 “Order Designations”)
7)
Entire channel of a supply output
The Smart-FET-transistors have electronic short circuit and overload supervisions. The electronic
supervision can activate and switch off the output at high short-circuit currents. The short circuit and
overload supervisions are only active when the supply output is switched on (operating state "ON").
An activating of the electronic supervision is signaled by the channel LED with a red continuous light.
In addition at the signaling outputs MELD (active HIGH) and MELD_N (active LOW) a collective sta-
tus signal is output.
1)
2)
3)
6)
5)
4)
7)
