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RE-2X (St)Ymb, Lg, |
Instrumentation cable with static screen flame-retardant,
black and blue
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PPDV-af
Alternative designations :
RE-2X (St) 2YbY
XLPE / OSCR / PE / SWA / PVC
Characteristics :
- 7 wire conductors
- shielded cable core
- armoured using steel wires
and counterwound strip
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PPDV-2af
Alternative designations :
RE 2X(St) 2YbY-PiMF
SLPE / PSCR / OSCR / PE / SWA / PVC
Characteristics :
- 7 wire conductors
- shielded pairs
- shielded cable core
- armoured using steel wires |
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Applications |
These computer cables with flame-retardant
PVC outer sheath and XLPE core insulation
are used for optimum data transmission
for medium transmission rates up to
200 kbits/s in process control and
data processing systems.
Short and
different pitch lengths for the pairs
guarantee favourable crosstalk attenuation
values. Low operating capacitance and
attenuation values enable large transmission
distances and short pulse times.
The static
screen (St) of plastic coated metal foil
protects the circuits from external electrical
interference for compliance with capacitance
unbalance specifications and to assure
an exact pulse transmission. These cables
are suitable for permanent installation
in dry, moist and wet rooms, for outdoor
applications and underground installation.
Characteristic features
• XLPE core
insulation guarantees a low capacitance
value.
• Twisted pairs
with selected pitch lengths guarantee
good crosstalk attenuation values.
• The
black PVC outer sheath is resistant
to UV radiation.
Durability
• The PVC sheath is largely resistant to oils.
• Chemical
resistance of PVC-refer also to the Table of
Technical Guidelines.
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Construction
conductors :
soft-annealed, plain
electrolytic copper, 7 wires stranded
to form a flexible conductor.
insulation
:
XLPE (cross-linked polyethylene),
0.4 mm nominal thickness.
pairs,
numbered*) :
2 cores twisted
into a pair.
Core colours are white
and black.
Shielding of pairs
(PPDV-2af) :
- 1 layer of
polyester foil,
- 1 layer of polyester
/ aluminium foil with a solid tinned
copper earth wire 0.6 mm dia.,
- 1
layer of polyester foil.
Communication
core*):
0.5 mm 2 (7 x 0.31
mm dia.), with orange XLPE insulation.
Shielding
of cable core:
- 1 layer of
polyester foil,
- 1 layer of polyester
/ aluminium foil with tinned copper
earth litz wire (7 x 0.31 mm dia.),
- 1 layer of polyester foil.
inner
sheath :
PE (polyethylene)
armouring
:
round or flat galvanised
steel wires (depending on the cable
diameter) and open-pattern counterwound
galvanised steel strip.
Outer
sheath :
Flame-retardant PVC,
sheath colour is black or blue.
standards
:
(as far as applicable):
IEC 189, 228, 228A, 332-3C and 502.
KEMA standard K102 and draft CENELEC
specifications for instrumentation
cables.
* ) Lacking
on single-pair PPDV-af cables and the
triplet cable (1x3x1.3).
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Dimensions
| PV-af
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Sheath-thickness
mm. approx.
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| 1x2x0.5 |
1.2 |
11.0 |
236 |
2x2x0.5 |
1.2 |
13.0 |
308 |
4x2x0.5 |
1.3 |
15.0 |
399 |
8x2x0.5 |
1.3 |
18.0 |
515 |
12x2x0.5 |
1.4 |
20.5 |
664 |
16x2x0.5 |
1.4 |
22.5 |
769 |
20x2x0.5 |
1.5 |
24.5 |
905 |
24x2x0.5 |
1.5 |
25.5 |
1000 |
36x2x0.5 |
1.7 |
31.0 |
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1x2x0.75 |
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2x2x0.75 |
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4x2x0.75 |
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8x2x0.75 |
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12x2x0.75 |
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20x2x0.75 |
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36x2x0.75 |
1.7 |
31.0 |
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| 1x2x1.3 |
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2x2x1.3 |
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4x2x1.3 |
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8x2x1.3 |
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16x2x1.3 |
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24x2x1.3 |
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36x2x1.3 |
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1x3x1.3 |
1.3 |
12.5 |
314 |
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2x2x0.5 |
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4x2x0.5 |
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16x2x0.5 |
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20x2x0.5 |
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24x2x0.5 |
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36x2x0.5 |
1.8 |
34.0 |
1510 |
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| 2x2x0.75 |
1.2 |
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4x2x0.75 |
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8x2x0.75 |
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1729 |
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| 2x2x1.3 |
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| 4x2x1.3 |
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16x2x1.3 |
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20x2x1.3 |
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24x2x1.3 |
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| 36x2x1.3 |
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| 6x3x1.3 |
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| 12x3x1.3 |
1.7 |
30.0 |
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| Electrical characteristics
Twenkacom (at 20 ° C) |
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mm2 |
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Conduction
resistance |
< 36.8 |
< 24.6 |
< 14.2 |
Ω/km |
| Capacitance of
'af' |
50 |
55 |
60 |
nF/km |
Capacitance
of 2af' |
70 |
80 |
100 |
nF/km |
Induction
at 1 kHz |
0.7 |
0.65 |
0.65 |
mH/km |
Attenuation
at kHz of af' |
0.9 |
0.8 |
0.6 |
dB/km |
Attenuation
at 1 kHz of 2af' |
1.1 |
1.0 |
0.8 |
dB/km |
Speed
loss factor |
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af |
0.56 |
0.56 |
0.53 |
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2af |
0.48 |
0.46 |
0.41 |
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| Crosstalk attenuation
at 1 MHz of af' |
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< 70 |
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dB/km |
| Crosstalk attenuation
at 1 MHz of 2af' |
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< 85 |
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dB/km |
| Insulation resistance |
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> 5 |
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GΩ .km |
| Operating voltage |
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250 |
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V |
| Test voltage |
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2000 |
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V |
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FIDLD OF APPLICATION
Twenkacom signalling
Control
interfacing (RS232, RS422, RS423,
V24, V28 etc) (*)
data-networks(*)
< 1 Mbs.
video signals etc.
(*) depening on the
distance |
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