SIEMENS
10/2
Siemens KT 10.1 · 2016
10
Add-on modules
Introduction
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Overview
Expansion modules for increasing system availability
A power supply unit on its own cannot guarantee fault-free 24 V
supply. Power failures, extreme variations in the mains voltage,
or a faulty load can bring plant operation to a standstill and
cause high costs. The add-on modules offer everything from
extensive protection against interference on the primary and
secondary side right up to complete all-round protection.
Redundancy modules – for doubling system availability
SITOP redundancy module
Advantages of the redundancy modules
•
High availability of the 24 V supply thanks to redundant
configuration
•
Power is reliably supplied even when a power supply fails
•
Compact redundancy modules for power supplies up to 40 A
•
Redundancy module 24 V/NEC Class 2 with limiting to 100 VA
•
Diagnostic signal via LED and signaling contacts
•
Adjustable switching threshold for LED and signaling contacts
Selectivity modules – for protection of 24 V feeds
SITOP selectivity module
Advantages of selectivity modules
•
Reliable detection of overload or short-circuit in the 24 V
circuit
•
Reliable shutdown in case of overload regardless of cable
lengths or cross-sections
•
Four load feeders per module
•
Versions with adjustable threshold from 0.5 to 3 A or 3 to 10 A
•
Sequential connection of feeds is possible to reduce inrush
current
•
Diagnostics via group signaling contact or single-channel
signaling
•
Evaluation via free-of-charge SIMATIC S7 function blocks for
modules with single-channel signaling
Buffer module – bridging power failures for as long as
seconds
SITOP buffer module
Advantages of the buffer module
Power failures normally only last for fractions of a second, but
they can still cause costly and time-consuming damage in sen-
sitive production areas. In combination with SITOP smart and
SITOP modular power supply units, the buffer module bridges
short voltage dips of this type with its electrolytic capacitors and
ensures uninterrupted operation.
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More information
Select the appropriate power supply quickly and easily with the
SITOP Selection Tool:
Power
supply unit
Redundancy
module
Power
supply unit
24 V DC
G_KT01_XX_00121
Power
supply unit
Selectivity
module
Actuators
Sensors
24 V DC
G_KT01_XX_00122
HMI
PLC
SITOP modular
SITOP smart
power supply
Buffer
module
24 V DC
G_KT01_XX_00123
© Siemens AG 2016