5 connecting to power supply, 1 preparing the connection – VEGA VEGAMET 381 User Manual

Page 23

5 Connecting to power supply

VEGAMET 381 • 4 … 20 mA signal conditioning instrument

27567-01-131025

4. Insert the instrument from the front into the

front panel [1].

5. Place the clamping strap [2] from the back

over the pin [3] and pull it with the knurled

nut [4] against the panel [1].

Abb. 10: Front panel mounting
1 Front panel

2 Clamping bracket

3 Pin

4 Knurled nut

Screw mounting

1. Insert the metal strap [1] from above into the

housing cut-out.

2. Fasten the instrument directly to the wall

with the three screws (max. ø 4 mm).

105

ø 4,5*

Abb. 11: Screw mounting
1 Metal strap

Carrier rail mounting

1. Place the adapter plate [1] to the rear of

VEGAMET 381 (spring of the adapter plate

downward) and fasten the plate with screw

[2] (M4 x 6).

2. PlaceVEGAMET 381 against the carrier

rail [3] from below and push the instrument

upward until it snaps in.

43,5

Abb. 12: Carrier rail mounting
1 Adapter plate

2 Screw (M4 x 6)

3 Carrier rail

5 Connecting to power

supply

5.1 Preparing the connection

Note safety instructions

Always keep in mind the following safety inst-

ructions:

•

Connect only in the complete absence of

line voltage

•

If overvoltage surges are expected, overvol-

tage arresters should be installed

Take note of safety instructions for Ex

applications

In hazardous areas you must take note

of the respective regulations, conformity

and type approval certificates of the

sensors and power supply units.

Select power supply

The power supply can be 20 … 253 V AC,

50/60 Hz or 20 … 253 V DC.
Select connection cable

The operating voltage of VEGAMET 381 is

connected with standard cable according to the

national installation standards.
The instrument is connected with standard

two-wire cable without screen. If electromag-

netic interference is expected which is above

the test values of EN 61326 for industrial areas,

screened cable should be used.
Cable screening and grounding

Connect the cable screen on both ends to

ground potential. In the sensor, the screen must

be connected directly to the internal ground

terminal. The ground terminal outside on the

sensor housing must be connected to the

potential equalisation.