VACUUBRAND Digital Interface - Handbuch (Seite 17)

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Documents are only to be used and distributed completely and unchanged. It is strictly the users’ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999221 / 27/05/2009
Function of the digital I/O interface
Factory-set the digital I/O interface is configurated as fault indicator for internal faults (e. g. valve,
VARIO pump, sensor failure, ....) as well as for external faults (apparatus / application of the user).
The digital I/O interface has a galvanically isolated switching input and switching output.
The LED indicates via change of the colour the switching status of the input and the output and therefore
the kind of error:
The LED indicates the switching status of the input and the output:
- green: no fault, signal at the input correct (5-75 VDC or 5-50 VAC), output switched (switching out-
put closed).
- yellow: internal fault (valve, VARIO pump, sensor failure, ....), signal at the input correct (5-75 VDC
or 5-50 VAC), output not switched (switching contact open).
- red: external fault: signal at the input incorrect (< 5 VDC or 5 VAC), output not switched (switching
contact open).
Error messages have to be quit (deleted) after elimination of the fault by pressing key START/STOP at
the CVC 3000.
When using the digital interface with the controller CVC 3000 or VNC 2 or the measurement de-
vice DCP 3000 a signal (5-75 VDC oder 5-50 VAC) at the input is necessary. Otherwise vacuum
control is stopped and / or the device indicates a fault (flashing warning triangle).
Only if using the CVC 3000 or the DCP 3000 the digital I/O interface can be configurated for function
“Remote (Start - Stop)” or “End” or „Valve“ (Isol.v. 1 2 3 4, Waterv. 1 2 3 4, Air. V. 1 2 3 4, VMS 1 2 3).
Notes concerning the configuration see section “Configuration of the interfaces).
- Remote module (Start - Stop): Pressure control can be started with a signal (5-75 VDC or 5-50
VAC) at the input of the interface. The output contact indicates the status of the control (switching
contact closed: control is running). Control stops if there is no voltage signal at the input (output
switching contact closed).
The LED indicates the operation status: red indicates Stop, green indicates Start.
- End module: In this configuration no signal at the input is necessary. At the output e. g. a valve ( e.
g. venting valve) or a relais is connected which opens if process control is stopped.
- Valve adapter module: The digital I/O interface can be used as interface for exsisting (provided by
the customer) isolation, coolant or venting valves or a VACUUBRAND VMS module, if these com-
ponents are not equipped with a VACUU•BUS TM connection. The component has to be connected to
the output of the module (an additional voltage supply is necessary).