KROHNE VFM 3100 EN User Manual

Page 15

Table 5. Preparation of Remote Signal Cable (Electronics End)

1. Slide the knurled nut and then the rubber bushing onto

outer jacket of cable as shown at right. Next, remove outer
polyethylene jacket of cable to dimension shown.

2. Cut and remove braided copper shield to dimension shown

at right. This will expose the barrier (plastic) tape and foil
mylar that encloses the conductors.

3. Cut and remove the barrier tape, foil mylar and fillers to

dimension shown at right. This will expose two twisted
pairs of conductors (brown-yellow, orange-red) and an
uninsulated drain wire. The barrier tape under the copper
braid prevents the drain wire from shorting to the copper
braid shield.

Electronics End (Electronic Housing End) Procedures

Outer polyethylene
jacket

203 mm (8.0 in)

Knurled nut

Rubber bushing

Copper braid

178 mm (7.0 in)

25 (1.0)

Knurled nut

Rubber bushing

Copper braid

Barrier tape and foil mylar

Knurled nut

Rubber bushing

Copper braid

Barrier tape and foil mylar

Two twisted pairs

Uninsulated drain wire

25 (1.0)

40 (1.5)

4. Cut off drain wire at end of barrier tape and foil mylar as

shown ar right. It is not used at this end.

5. Apply shrink tubing or electrical tape to end of barrier tape

and foil mylar at location shown at right. Note that the shrink
tube or tape covers end of barrier tape and mylar as well as
a portion of the 2 twisted pairs of wires. This will prevent the
barrier tape and foil mylar from unwrapping.

6. Cut and strip ends of the two twisted pairs to dimension

shown at right. Label outer cable jacket ”Electronic End”
to avoid confusion during installation. Cable is now ready
for installation.

Knurled nut

Copper braid

Barrier tape and foil
mylar

cut off
here

Two twisted pairs

Outer polyethylene
jacket

Knurled nut

Rubber bushing

Rubber
bushing

Shrink tube or
electrical tape

cut and strip 4 places

Copper braid
do not tape

Label cable
jacket

Electronic

end

Barrier tape
and foil mylar

Barrier tape and foil mylar

Shrink tube or
electrical tape

Two twisted pairs

Outer polyethylene
jacket

Two twisted pairs

Rubber bushing