16
7 ND90 71 en
4.5
Electrical connections
ND9000H, ND7000H
The ND9000H and ND7000H is powered by a standard 4–20
mA current loop that also functions as a carrier to the HART
communication.
The input signal cable is led through a
M20 x 1.5 cable gland, or
1/2 NPT cable gland (U, E2)
Connect the conductors to the terminal strip as shown in
Fig. 9. It is recommended that the earthing of the input
cable shield be carried out from the DCS end only.
The position transmitter is connected to 2-pole terminal PT
as shown in Fig. 9. The position transmitter needs an exter-
nal power supply. The ND9000H / ND7000H and the posi-
tion transmitter circuits are galvanically isolated and
withstand a 600 V AC voltage.
ND9000F, ND9000P
The ND9000F is powered by F
OUNDATION
fieldbus
(IEC 61158-2).
The ND9000P is powered by Profibus PA (IEC 61158-2).
The same bus cable is used also for the fieldbus communi-
cation.
The bus cable is led through a
M20 x 1.5 cable gland, or
1/2 NPT cable gland (U, E2)
Connect the conductors to the terminal strip as shown in
Fig. 10.
Reverse polarity protection permits connection of the bus
cables in any order.
The cable shield can be grounded by connecting the shield
to the earth connection screw. The shield can be left uncon-
nected by using the empty terminal.
Please note following before mounting the cover of the
valve controller:
Attach the LUI (223) cabling to the sticker on the
reverse side of the LUI.
Check that the cabling does not get squeezed by the
electronics cover (39) or the device cover (100).
Check using a feeler gauge that the clearance
between the position indicator (109) and the elec-
tronics cover is 1 mm.
NOTE:
The ND9000H and ND700H equal a load of 485 Ω in the
current loop.
Fig. 7
Terminals, ND9000H and ND7000H
HART connection
position transmitter
connection (optional)
Fig. 8
Terminals, ND9000F and ND9000P