EPS Stromversorgung PSI 9040-120 2U, Руководство по эксплуатации

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info@eps-germany.de
PSI 9000 2U Series
3.5.4.5 Overview of the Sub-D Socket
3.5.4.6 Simplified diagram of the pins
+
Digital Input (DI)
It requires to use a switch with low resist-
ance (relay, switch, circuit breaker etc.) in
order to send a clean signal to the DGND.
V~0.5
AGND
Analog Input (AI)
High resistance input (impedance
>40 k
Ω
....100 kΩ) for an OA circuit.
4.
7k
12V +10V
Digital Output (DO)
A quasi open collector, realised as high
resistance pull-up against the internal sup-
ply. In condition LOW it can carry no load,
merely switch, as shown in the diagram
with a relay as example.
V~2
AGND
Analog Output (AO)
Output from an OA circuit, with low
impedance. See specifications table
above.
3.5.4.7 Application examples
a) Switching the DC output with pin “REM-SB”
A digital output, e.g. from a PLC, may be unable to cleanly pull down the pin as
it may not be of low enough resistance. Check the specification of the controlling
application. Also see pin diagrams above.
In remote control, pin REM-SB is be used to switch the DC output of the device on and off. Stan-
dalone operation of this pin can be used as well, but requires to have switched the DC output on
before using the pin to switch off and later on again.
It is recommended that a low resistance contact such as a switch, relay or transistor is used to switch
the pin to ground (DGND).
Following situations can occur:
• Remote control has been activated
During remote control via analog interface, only pin “REM-SB” determines the states of the DC output, according
to the levels definitions in 3.5.4.4 . The logical function and the default levels can be inverted by a parameter in the
setup menu of the device. See 3.4.3.1 .
If the pin is unconnected or the connected contact is open, the pin will be HIGH. With parameter
“Analog interface REM-SB” being set to “normal”, it requests “DC output on”. So when activating
remote control, the DC output will instantly switch on.