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Connections
Caution!
The terminal assignment specified in
the certificate must be adhered to.
Reversing the assignment of the elec-
trical terminals may cause the explo-
sion protection to become ineffective!
Do not tamper with enameled
screws inside or on the housing.
Note on the selection of cables and
wires:
To install intrinsically safe circuits,
observe section 12 of the standard
EN 60079-14: 2003 (VDE 0165
Part 1).
To run multi-core cables or lines
with more than one intrinsically
safe circuit, section 12.2.2.7 of
this standard applies.
An additional cable gland can be
installed when connecting the de-
vice over two separate cables.
Cable entries left unused must be
sealed with blanking plugs.
Devices used at ambient tempera-
tures down to –40 °C must have
metal cable entries.
The terminal assignment can be found in
Fig. 9 as well as on the labels on the cover
plate of the positioner case.
Bus line
The shielded fieldbus connecting cable must
be routed over the EMI-proof brass cable
gland (standard) of the positioner to the ter-
minals. The shield which is placed over the
clamping insert is connected over a large
area to the gland and housing.
26
EB 8383-1 EN
To connect the bus line, loosen the coup-
ling nut and the clamping insert from the
positioner and remove the dust cap.
Slide the coupling nut and clamping in-
sert over the connecting cable.
Insulate the end of the bus line to the re-
quired connecting length and cut the
wire shield off up to a length of approx.
13 mm. If necessary, cut off any cable
core filling as well.
Disentangle the braided shield and pull
it over the clamping insert.
Press the clamping insert into the con-
necting screw gland and screw tight the
coupling nut until the connecting cable is
clamped tight.
Route the two-wire bus line to the screw
terminals marked "EN 61158-2",
whereby no polarity has to be observed.
In exceptional cases, when the plant may
not allow such a connection, feed the cable
shield through the cable gland and connect
it to be capacitive over the terminal "S".
However, make sure that a conducting con-
nection cannot occur from the shield to the
cable gland or housing.
Note!
The connection of limit switches, binary
input and forced venting function requires
an additional cable gland that must replace
the cap fitted on the housing.
Accessories: Cable gland M20 x 1.5, nickel-
plated brass, order no. 8808-0143
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