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Safety instructions
Voltage supply
Connection cable
Connection technology
Connection procedure
VEGAMIP U61 • - Relay
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Connect only in the complete absence of line voltage
l
If overvoltages are expected, install overvoltage arresters
l
Connect the operating voltage according to the following diagrams.
The oscillator with relay output is designed in protection class 1. To
maintain this protection class, it is absolutely necessary that the
ground conductor be connected to the internal ground terminal. Take
note of the general installation regulations. As a rule, connect
VEGAMIP 61 to vessel ground (PA), or in case of plastic vessels, to
the next ground potential. On the side of the housing there is a ground
terminal between the cable entries. This connection serves to drain off
electrostatic charges. In Ex applications, the installation regulations for
hazardous areas must be given priority.
The data for power supply are specified in chapter "Technical data".
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should be
used.
Use cable with round cross-section. A cable outer diameter of 5 ... 9 mm
(0.2 ... 0.35 in) ensures the seal effect of the cable gland. If you are
using cable with a different diameter or cross-section, exchange the
seal or use a suitable cable gland.
5.2 Connection procedure
The connection of the voltage supply and the signal output is carried
out via the spring-loaded terminals in the housing.
Proceed as follows:
1
Unscrew the housing cover
2
Loosen compression nut of the cable entry
3
Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of the individual wires
5 Connecting to power supply
19
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