28 SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
D-Subminiature Sockets (only at optional port B)
9-pin D-subminiature sockets are provided for all electrical communica-
tion interfaces Standard 9-pin D-subminiature plug connectors per
MIL-C-24308 and DIN 41652 can be used.
The necessary communication cables are dependent on the interface:
RS232: 3-wire or 5-wire, twisted and shielded, e.g. interface cable
7XV5100-4.
RS 485: 3-wire, twisted and shielded.
Profibus: 2-wire or 4-wire, twisted and shielded:
Wire type A according to EN 50170/vol. 2 and DIN 19245/part 2,
Wire Resistance: 135 Ω to 165 Ω (f > 100 kHz),
Capacitance: < 48 nF/mile or < 30 nF/km,
Circuit Resistance: < 177 Ω/mile or < 110 Ω/km,
Conductor Diameter: > 0.64 mm,
Conductor Cross-sectional Area: > 0.34 mm
2
,
e.g. SINEC L2 Industrial Twisted Pair installation wire,
(see catalogue IK 10 “SIMATIC NET, Industrial Communication Net-
works”).
Figure 10 9-pin D-subminiature Connector
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