VEGA VEGAMIP R61 Receiving unit - Relay - Manual (Page 23)

5 Connecting to power supply
5 .1 Preparing the connection
Always keep in mind the following safety instructions:
l Connect only in the complete absence of line voltage
l If voltage surges are expected, install overvoltage arresters
Connect the operating voltage according to the connection diagrams.
The electronics module is designed in protection class I. To maintain
this protection class, it is absolutely necessary that the earth conductor
be connected to the inner earth conductor terminal. Keep the general
installation regulations in mind. Take note of the corresponding
installation regulations for hazardous areas with Ex applications.
The data for power supply are specified in chapter "Technical data".
The instrument is connected with standard three-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.
Cover all housing openings conforming to standard according to
EN
60079-1.
5 .2 Connection procedure
The voltage supply and signal output are connected 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
Safety instructions
Voltage supply
Connection cable
Connection technology
Connection procedure
VEGAMIP R 61 • - Relay 23
5 Connecting to power supply
35786
-
EN
-120228