VEGA MINITRAC 31 Foundation Fieldbus - Manual (Page 21)

21
5 Connecting to power supply
MINITRAC 31 • Foundation Fieldbus
41782-EN-131119
T-distributor, the screen of the short stub to the sensor must not be
connected to ground potential or to another cable screen. The cable
screens to the power supply unit and to the next distributor must be
connected to each other and also connected to ground potential via a
ceramic capacitor (e.g. 1 nF, 1500 V). Low-frequency potential equali-
sation currents are thus suppressed, but the protective effect against
high frequency interference signals remains.
The voltage supply and signal output are connected via the spring-
loaded terminals in the housing.
The connection to the display and adjustment module or to the inter-
face adapter is carried out via contact pins in the housing.
Proceed as follows:
The procedure applies to instruments without explosion protection.
1. Unscrew the big 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
4. Insert the cable into the sensor through the cable entry
1
Fig. 9: Connection steps 4 and 5
1 Locking of the terminal blocks
5. Insert a small slotted screwdriver firmly into the rectangular lock
openings of the respective connection terminal
Connection technology
Connection procedure