Vacuubrand DCP 3000 User Manual download pdf (Page 41)

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Setpoints

Valves (see “Accessories”, pg. 51) can, after appropriate conguration,

be opened or closed at preset ”On” and ”Off” setpoints. Thus the switch-

ing of the valves is controlled by the measured system pressure.

The digital I/O interface can be used as interface for existing (provided

by the customer) isolation, coolant, or venting valves, in case these com-

ponents are not equipped with a VACUU•BUS

connection. The com-

ponent has to be connected to the output of the module; an additional

voltage supply is required.

Requirements for working with setpoints:

To switch a valve or an I/O interface connected to the DCP 3000 pres-

sure-dependently, the following requirements must be met:

- at least one external pressure transducer VSK 3000, VSP 3000 or

MPT 100 is connected to the DCP 3000 vacuum gauge (VACUU•BUS

address ”VSK x”, ” VSP x” or ”MPT x”).

- a valve or a digital I/O interface is connected to the DCP 3000 and con-

gured to the according VACUU•BUS address ”SP x” to be operated

by setpoints (see below on how to congure components for working

with setpoints).

- an ”On” setpoint ”On x” or an ”Off” setpoint ”Off x” for switching the

valve/interface is preset.

- all required components and setpoints have to be congured to corre-

sponding VACUU•BUS addresses (e.g., pressure transducer ”VSK

1”, valve ”SP 1”, ”On” setpoint ”On 1”, ”Off” setpoint ”Off 1”). The same

applies to VACUU•BUS addresses ”... 2”, ”... 3” and ”... 4”.

Setting setpoints:

Go to the conguration menu and select the submenu ”Setpoint”. You

may preset four pressure values as ”On” setpoints (”On 1”, ..., ”On 4”)

and four ”Off” setpoints (”Off 1”, ..., ”Off 4”).

Thus, for each valve or I/O interface one ”On” setpoint and one ”Off” set-

point can be set. The setting range depends on the measuring range of

the pressure transducer connected to the DCP 3000.

Example:

If the ”On” setpoint ”On 1” is set to 500 Torr and a pressure less than or

equal to 500 Torr is measured by the corresponding pressure transducer

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Vacuubrand DCP 3000 User Manual Page 41