Siemens 6SN1123-1AA00-0DA2 Configuration Manual page 74

10.04
05.01
Remote/sense
The power supply voltage of the measuring system is sensed using the sense
lines P sense and M sense (quasi zero–current measurement).
operation means:
The controller compares the measuring system power supply voltage, sensed
using the remote sense lines, with the reference power supply voltage of the
measuring system and adjusts the power supply voltage for the measuring
system at the drive module output until the required power supply voltage is set
directly at the measuring system.
This means that the voltage drops across the power supply cables – P encoder
and M encoder – are compensated and corrected by the encoder power supply.
The reference voltage is generated from a reference voltage source and is 5 V.
This means that it is possible to use cable lengths up to 50 m without having to
operate the measuring systems with an undervoltage condition.
Note
All data only apply for SIEMENS pre–assembled cables as these are correctly
dimensioned regarding the cable cross–sections.
For SIMODRIVE connection systems and also for the measuring system
suppliers, remote/sense operation is only possible for encoder systems with
voltage signals.
For motor measuring systems and mounted SIMODRIVE sensor encoders, the
sense lines are connected in the encoder or in the connector on the encoder
side. For third–party encoder systems, the customers must make the
appropriate connections.
High Performance
Remote/sense operation
digital FD and
MSD drive control
Drive module
P encoder
P sense
M encoder
M sense
Drive module
P encoder
P sense
M encoder
M sense
Fig. 3-6 Signal overview of the connections
© Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
l ≤ 50 m
Customers must make the connections,
i.e. P encoder with P sense and
M encoder with M sense
l ≤ 50 m
3 Motor Selection, Position/Speed Sensing
3.4 Direct position sensing
Measuring system without
remote/sense lines
l ≤ 5 m
Measuring system with
remote/sense lines
l ≤ 5 m
P encoder
M encoder
P encoder
P sense
M encoder
M sense
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