User Manual 08/2003 Edition
User Manual 08/2003 Edition
User Manual 08/2003 Edition
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2<br />
2 Installing and Connecting–up 02.99 <strong>08</strong>.03<br />
2.3 Connection and wiring overview<br />
2.3.2 Protective grounding and potential bonding<br />
Protective<br />
grounding<br />
Grounding<br />
Grounding cable<br />
shields<br />
PROFIBUS<br />
cabling<br />
Grounding,<br />
load power supply<br />
Grounding,<br />
electronics power<br />
supply<br />
(optional)<br />
Power supply<br />
2-44<br />
Use the M5 threaded hole in the connection cover for the protective<br />
conductor (refer to Chapter 2.3.1).<br />
Notice<br />
When removing a POSMO A it is not permissible that the protective<br />
conductor is interrupted.<br />
We recommend the following when connecting–up the protective<br />
conductor:<br />
Star–type configuration, or<br />
The input and output of the protective conductor at the connection<br />
cover must be crimped in one cable lug (refer to Fig. 2-12).<br />
Connect cable shields, ground connections and electronic grounds to<br />
ground through the largest surface area.<br />
The cable shields must be connected in the gland to the largest surface<br />
area.<br />
Notice<br />
The cable shield of each bus node must be connected to ground<br />
through the largest possible surface area (at SIMODRIVE POSMO A<br />
in the PG gland).<br />
Recommendation:<br />
Route a potential bonding conductor in parallel to PROFIBUS<br />
(cable cross–section: 4 – 16 mm2 ).<br />
Use the M5 threaded hole in the connection cover for the potential<br />
bonding conductor (refer to Chapter 2.3.1).<br />
If connector couplings are used for PROFIBUS at<br />
higher data transfer rates (> 1.5 Mbaud), then perfect functioning can<br />
no longer be guaranteed (cable reflection).<br />
Ground the load power supply at the secondary side in the cabinet.<br />
When using a shielded cable, the shield must be connected at the supply<br />
point to ground potential through the largest possible surface area.<br />
Ground the 24 V electronics power supply on the secondary side in the<br />
cabinet. The power supply cables are routed without any shielding in<br />
the PROFIBUS cable.<br />
PELV<br />
Protective Extra Low Voltage<br />
The protective extra low voltage (PELV) must have protective separation,<br />
be grounded and must be safe to touch.<br />
Associated standards:<br />
DIN EN 60204 Part 1, DIN EN 60529, DIN EN 50178 DIN VDE 0160<br />
Siemens AG <strong>2003</strong> All rights reserved<br />
SIMODRIVE POSMO A <strong>User</strong> <strong>Manual</strong> (POS1) – <strong>08</strong>.03 <strong>Edition</strong>
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