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Terminology and
Abbreviations
Product Overview
Terms
DC 24V
24V DC
nom
typ
— (alone in table cell)
1+1 Redundancy
Figure 1 - 1 + 1 Redundancy
AC
AC
DC
DC
IN 1
IN 2
OUT
-
Load
Figure 2 - 1606-XLERED20Y
Dual Redundancy Module
The redundancy uses MOSFETs instead of diodes for the decoupling of the two
input channels. This redundancy design reduces the heat generation and the
voltage drop between input and output. The redundancy module does not
require an additional auxiliary voltage.
Due to the low power losses, the unit is slender and only requires 32 mm
(1.26 in.) width on the DIN rail. Large connection terminals allow for a safe and
fast installation. The large international approval package makes this unit
suitable for nearly every application.
Rockwell Automation Publication 1606-RM107A-EN-P - July 2020
Descriptions
A value that is displayed with the AC or DC before the value represents a nominal
voltage with standard tolerances (usually ±15%) included. For example: DC 12V
describes a 12V battery disregarding whether it is full (13.7V) or flat (10V).
A value with the unit (V DC) at the end is a momentary value without any additional
tolerances included.
Indicates a nominal value.
Indicates a typical value.
A single dash alone in a table cell indicates that there is no information to be included
in that cell.
Use of two identical power supplies in parallel to provide continued operation following
most failures in a single power supply. The two power supply outputs should be
isolated from each other by using diodes or other switching arrangements. For
example, two 10 A power supplies are needed to achieve a 10 A redundant system.
The 1606-XLERED20Y is a redundancy module
for building redundant power supply systems.
It is equipped with two input channels and one
output. MOSFET technology is used to
decouple the two inputs.
The device is equipped with an automated load
sharing feature, which can compensate a small
voltage imbalance between the power supplies
connected to the inputs to achieve an even
current share. It also monitors the function of
the redundancy circuitry and provides a signal
if there is a failure or a high output current,
which could prevent redundancy if one power
supply fails. If this feature is not required, the
1606-XLERED20 is available.
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