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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 DT Series
3.5.4.5
Overview of the D-Sub15 socket
3.5.4.6
Simplified diagram of the pins
++
Digital Input (DI)
The DI is internally pulled up and thus it
requires to use a contact with low resist-
ance (relay, switch, contactor etc.) in order
to clearly pull the signal down to DGND.
V~0.5
AGND
Analog Input (AI)
High resistance input (impedance
>40 k
Ω
...100 kΩ) for an operational
amplifier circuit.
4K
7
12V
+10V
Digital Output (DO)
A quasi open collector, realised as high
resistance pull-up against the internal
supply. The design doesn’t allow the pin
to be loaded, but to switch signals by
sinking current.
V~2
AGND
Analog Output (AO)
Output from an operational amplifier
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 correctly pull down the pin as
it may not have a low output impedance. Check the specification of the controlling
application to find out if the output is compatible. Also see the pin diagrams above.
In remote control, pin REM-SB is used to switch the DC output of the device on and off. The function
of the pin is also available without remote control being active. See below.
It’s recommended that a low resistance contact such as a switch, relay or transistor is used to pull
the pin to ground (DGND).
Following situations can occur:
• Analog 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
. The logical function and the default levels can be inverted by a parameter in the
setup menu of the device. See
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 with pin REMOTE, the DC output will instantly switch on.
Summary of Contents for PSI 9000 DT Series
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