Vermes MDS 358X user Manual.pdf - 第61页

Initial Operation 50 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries Fig. 21 : Distan ce of t he bores 45 mm IMPORTANT NOT E Corrosion In order t o prevent cor rosion , all part s used in conn ecti on with t he va…

Initial Operation

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

6.3 Installation of the Microdispensing System

Prior to installation, verify the conditions in the intended location, with respect to the

specification of the system and information detailed in this chapter.

The control unit and the valve have to be installed strictly in conformity with the procedures

described below. The system requires:

• Power supply

• Pneumatic supply

INFORMATION

Read chapter “Safety Notes” first

The entire procedure of installation is reserved to persons reliably informed about the safety

considerations (see chapter 2, page 8).

6.3.1 Installation of the Control Unit

The control unit is designed as a 19” plug-in module, which has to be fixed in the corresponding

rack by means of four pan-head screws at the front side. Leave sufficient space around the unit to

simplify service. Ventilation should be available. Recommended are cases complying with

enclosures according to EN 61010-1 with regard to fire protection.

IMPORTANT NOTE

Potential damage to the control unit

Do not close the four pan-head screws too tight; otherwise the front panel can be damaged (see

torque table Page 19).

To avoid overheating and ensure the required ventilation, a minimum distance between the

control unit and any other object should be maintained (at least 1.5 cm). Heat should neither be

accumulated nor externally be introduced. Do not obstruct natural convection. Ventilation from

the bottom side and air exhaust above is important. Minimum width of ventilation openings is

8 cm x 8 cm.

For high-duty applications (from ca. 300 Hz) or in the case of an air cooled model (AC variants), a

rack with separate ventilation is advisable, since in these situations an airflow of 30 m

/h for each

control unit is compulsory.

6.3.2 Installation of the Valve as Part of a Machine

Preferably, mount the valve on an automatic XYZ table or in a similar device (XYZ positioning

system). Stable seat at the fixture of Z-axis is imperative, as the valve should not become loose

during the dispensing process. For this purpose, insert two M4 hex screws to a depth of 4 mm,

through the bores located at the narrow side of the valve. Their distance center to center

amounts to 45 mm. To improve accuracy when positioning the valve on a receptacle,

additionally use the alignment bore and the long hole, located on the narrow side of the valve as

well.

Initial Operation

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

Fig. 21: Distance of the bores 45 mm

IMPORTANT NOTE

Corrosion

In order to prevent corrosion, all parts used in connection with the valve (screws, fixing plates

etc.) should consist of stainless steel, nonferrous metals or galvanized steel.

6.3.3 Wiring of the MDS

The valve is connected to the control unit by means of a four-pin actuator plug (red) and five-pin

sensor plug (yellow). The plugs are protected by coding against interchanging by mistake.

WARNING

Switch off before removing plug

Never attempt to attach or remove one of these plugs, when the system is connected to mains.

CAUTION

Plan your cable connections carefully

Make sure to plan your cable run carefully, when considering the wiring, especially if the valve is

included into a more complex system. Your cables cannot hang too loose, since then they might

start to swing and get damaged, because of the vibrations of the valve. On the other hand, you

need enough length in your cables, if the valve is moved in the z-axis.

IMPORTANT NOTE

Switch off for disconnection

Before you disconnect the valve from the control unit or connect it to it, switch OFF the whole

system.

6.3.3.1 Actuator Cable

Power to the piezo element is supplied by the actuator cable, which is wrapped with a red

antikink sleeve. The voltage range is -50 V to 150 V (bipolar operation).

Initial Operation

VTK-TR-BA-072e-1 - User Manual MDS 358X Series

Fig. 22: Connecting the actuator cable – step 1

– Step 1: Plug the cable into the corresponding connector on the rear side of the control unit

and screw it in place.

Fig. 23: Connecting the actuator cable – step 2

– Step 2: The other end, equipped with a four-pin LEMO connector (corrugated sleeve), has to

be connected to the red marked, looped cable attached to the valve.

INFORMATION

Connecting cables

Verify during the connecting procedure that the red dots on the plugs point towards each other.

INFORMATION

Release latch for disconnection

To secure the connectors there is a latch, which you have to release before disconnection. You

have to grip the corrugated outhousing. Pull back the outhousing of the male connector to

release the latch (see Fig. 24). Then pull both connectors apart without losing the grip and they

will separate.

Do not pull at the cables!

Fig. 24: Connector actuator cable - grip