Description Of The Interfaces And Functions - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

10.04
05.01
8.3.3

Description of the interfaces and functions

General
The electronics power supply integrated in the NE module supplies the con-
nected drive modules via the equipment bus; and, for the digital drive groups
611 digital, also the SINUMERIK controls 840D or 810D integrated in the group.
The number of modules that can be connected is limited. The connection power
of the modules that can be connected is determined by adding the assessment
factors regarding the electronics points (EP) and gating points (AP). If the power
requirement exceeds the power rating of the NE module power supply, then the
drive group must be expanded by one or more monitoring modules. The overall
system then includes two or more electronic systems that are independent of
one another.
Further, the charge limit of the DC link must be carefully observed (refer to
Chapter 1.3).
Enable signals/commands or fault signals only effect the axes connected to a
common equipment bus. The equipment bus is interrupted between the last
axis after the NE module and the monitoring module.
Examples
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S
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
8.3 Axis expansion using a monitoring module
Connection example, power supply (standard) ––> refer to Fig. 8-4.
The connection example shows the three–phase connection of the monitor-
ing modules using fuse terminals after the power connection of the NE mod-
ule.
As an alternative, the power supply of the monitoring module can also be
taken from the P600/M600 power DC link through terminals P500/M500. In
this case it must be taken into account that as a result of the limit imposed
by the DC link pre–charging circuit in the NE module, a maximum of two
monitoring modules with the associated axes may be connected. In this
case it must be carefully observed that after the line contactor is opened, the
DC link voltage decreases and therefore the power supply/communications
to the drive modules is interrupted.
As an alternative to fused terminals, the following circuit–breaker can be
used:
e.g. SIRIUS circuit–breaker, Order No. 3RV1011–1EA1V, (2.8–4 A )
This should be set to between 3.5 and 4 A. Although the active current drain
of the monitoring module is approx. 1 A, the rated current of the circuit–
breaker should be selected somewhat higher due to the high–frequency
harmonic components. When a connection cross–section of 1.5 mm
used, this therefore guarantees adequate cable protection.
Connection example, pulse enable ––> refer to Section 8.3.2
The axes connected after the monitoring module may only be enabled if the
NE module signaled ready/fault signal. This means that the power DC link
has been charged–up and the internal line contactor has been closed. Any
fault signals present at the NE module must act either instantaneously or
delayed, interlocked with the pulse enable terminal 63 on the monitoring
modules and the subsequent axes.
8 Important Circuit Information
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