Electrical System Requirements; General Electrical Requirements - Siemens SIMODRIVE POSMO A User Manual

2 Installing and Connecting–Up

2.2 Electrical system requirements

2.2 Electrical system requirements
2.2.1

General electrical requirements

General
requirements
2-30
The following general requirements must be observed:
S
The PROFIBUS–DP is coupled in conformance with the Standard.
A standard PROFIBUS cable can be used. In order to loop in the
optional electronics power supply, the same bus cable can be used
that is used in the distributed ET 200X I/O device.
References: /ET200X/
S
All of the bus nodes should be certified for PROFIBUS use.
Note
When using connector couplings for PROFIBUS, at higher data
transfer rates (> 1.5 Mbaud), perfect functioning is no longer
guaranteed (cable reflection).
S
An external power supply is required (24 V for a 75 W motor and
48 V for a 300 W motor, refer to Chapter 2.6.1 or 2.6.2 for technical
data).
S
The maximum conductor cross–section for the load power supply is
2
4 mm . If the power supply being used can supply more current
than is permissible for the cable, then the appropriate slow–acting
fuses must be provided (e.g. Neozed fuse).
S
A power management module (DC PMM) can optionally be con-
nected between the external load power supply and the input termi-
nals of the SIMODRIVE POSMO A. The DC PMM serves to elimi-
nate the regenerative feedback energy and to limit the conducted
noise. For higher levels of regenerative feedback energy, a Power
Management Module Extension (DC–PMM_E/48 V) can be con-
nected (refer to Chapter 2.2.3).
S
If the bus communications and position sensing are to remain active
even with the load power supply switched–out, then an optional
electronics power supply (24 V "20 %) can be used. The cables
are routed in the ET 200X bus cable (distributed peripheral system).
S
A BERO can only be connected as type 3–wire PNP.
S
The length of the I/O cables, their ground cables as well as their
24 V power supply cables may be a maximum of 30 m long (refer to
Table 2-2).
S
The grounding concept is specified corresponding to the data pro-
vided in Chapter 2.3.
S
The signal and power cables should be routed with a minimum
20 cm clearance between them and as close as possible to
grounded parts.
SIMODRIVE POSMO A User Manual (POS1) – 08/2013 Edition
Distributed ET 200X I/O
E Siemens AG 2013 All Rights Reserved
06.05 02.99