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 />
2.2 Electrical system requirements<br />
2.2 Electrical system requirements<br />
2.2.1 General electrical requirements<br />
General<br />
requirements<br />
2-26<br />
The following general requirements must be observed:<br />
The PROFIBUS–DP is coupled in conformance with the Standard.<br />
A standard PROFIBUS cable can be used. In order to loop in the<br />
optional electronics power supply, the same bus cable can be used<br />
that is used in the distributed ET 200X I/O device.<br />
References: /ET200X/ Distributed ET 200X I/O<br />
All of the bus nodes should be certified for PROFIBUS use.<br />
Note<br />
When using connector couplings for PROFIBUS, at higher data<br />
transfer rates (> 1.5 Mbaud), perfect functioning is no longer<br />
guaranteed (cable reflection).<br />
An external power supply is required (24 V for a 75 W motor and<br />
48 V for a 300 W motor, refer to Chapter 2.6.1 or 2.6.2 for technical<br />
data).<br />
The maximum conductor cross–section for the load power supply is<br />
4 mm2 . If the power supply which is used, can supply more current<br />
than is permissible for the particular cable, then appropriate fuses<br />
must be provided.<br />
A Power Management Module (DC-PMM) can be optionally connected<br />
between the external load power supply and input terminals of<br />
SIMODRIVE POSMO A. The DC-PMM is used to dissipate any regenerative<br />
feedback energy and to limit cable–borne disturbances.<br />
If the bus communications and position sensing are to remain active<br />
even with the load power supply switched–out, then an optional<br />
electronics power supply (24 V 20 %) can be used. The cables<br />
are routed in the ET 200X bus cable (distributed peripheral system).<br />
A BERO can only be connected as type 3–wire PNP.<br />
The grounding concept is specified corresponding to the data provided<br />
in Chapter 2.3.<br />
The signal and power cables should be routed with a minimum<br />
20 cm clearance between them and as close as possible to grounded<br />
parts.<br />
When using a contactor in the load power supply, before opening<br />
the contactor, it must be ensured that the pulses have been canceled<br />
via PROFIBUS (OFF 1).<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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