Siemens EN 50295 manual AS-Interface motor starters and IP65/67 load feeders, 105

AS-Interface Slaves

AS-Interface motor starters and IP65/67 load feeders

AS-Interface compact starters IP65 (400 V AC)

■Overview

The AS-Interface compact starter is a load feeder with degree of protection IP65, which is fully prewired inside, for switching and protecting any three-phase loads up to 5.5 kW at 400/500 V AC (electromechanical compact starter) or up to 2.2 kW (electronic compact starter) mostly 3-phase standard motors in direct-on- line and reversing operation. It consists either of an electrome- chanical controlgear combination or an electronic overload relay and circuit-breaker unit. The overload or short-circuit protection is located below a sealable, transparent cover and is therefore available for diagnosis. Two LEDs are provided to the left of the cover for diagnostic purposes for the AS-Interface and the aux- iliary power.

Live parts cannot be touched even when the cover is open. The control elements are activated via the integrated outputs. The status of the device is scanned via the inputs, e.g. check- backs from the auxiliary contacts of the circuit-breaker and con- tactor(s). A further input is used to detect the operating state of the optional hand-held terminal. The three power connectors are used to feed and loop through to the load supply voltage (power bus) and to connect to the load itself. Prefabricated power sup- ply lines can be used to connect compact starters which are di- rectly adjacent to each other. The maximum number of starters that can be supplied via a power supply cable is limited by the maximum permissible total current (up to max. 4 mm2 ~ 35 A), see Technical specifications.

DS/RS compact starters (electromechanical)

The electromechanical compact starters consist of a conven- tional switchgear combination with a SIRIUS circuit-breaker for protection against short-circuits and overloading and SIRIUS contactor(s) for normal switching. The advantages of the electro- mechanical starters are the reliable isolation during disconnec- tion and tripping, the integrated fuseless protection against short-circuits and the favourable price. What is more, direct cur- rents can also be switched with the electromechanical starters.

Planning information: In the case of temperature-critical applica- tions, we recommend operation in the lower setting range of the circuit-breaker.

EDS/ERS compact starters (electronic)
The electronic compact starters EDS (direct starter) and ERS
(reversing starter) consist of an electronic overload relay and an
electronic circuit-breaker unit.
The advantages of these electronic compact starters are the
broad limits within which the overload protection can be ad-
justed (the power range up to 2.2 kW at 400/500 V AC is covered
with just 2 versions), the fact that the electronic contact elements
in the power section are non-wearing, current detection (used
for monitoring the energy connector), emergency operation in
the event of an overload as well as remote resetting via the AS-
Interface after overload tripping.
The ERS compact starter is designed for direct on-line starting
in reversing mode. The electronic overload protection and the
shutdown response in the event of overload can be adjusted di-
rectly at the device.
Version with brake contact
All compact starters are available optionally with a separately
activated brake contact for electrically operated motor brakes.
For externally fed motor brakes, 24 V DC is supplied jointly with
the load voltage via the power connector on -X1. It is looped
through via -X3 for supplying the next compact starter on -X1.
The 24 V DC supply for the brakes is only bridged in those de-
vices equipped with a brake contact. At the project planning
stage, it is important to ensure that these starters are located	6
alongside each other.
All compact starters with a brake contact for 500 V DC can be
equipped with a 400 V AC brake contact.
Hand-held terminal
The hand-held terminal enables the compact starter to be oper-
ated locally and autonomously, providing that the auxiliary volt-
age supply is connected. Thus, assuming that the automation
level is functioning correctly, local switching operations can be
carried out in addition to normal manual operations in the event
of a programmable controller / bus system failure (emergency
mode) or during test runs before commissioning, e.g. for testing
the direction of rotation of the motor. The hand-held terminal can
be connected to the compact starter by means of a connecting
cable via a socket underneath the transparent cover.
Spare inputs
The compact starters are also equipped with two spare inputs.
The M12 socket is a "Y" connector. The signal inputs are applied
to PIN 2 and 4. In this manner, it is possible for example to con-
nect an optical proximity switch that supplies a signal and the
“fouling” alarm.
A "T" adapter can be used to split the signal inputs onto two M12
sockets. Compact starters modified in this way offer additional
advantages. At no extra cost, it is possible to save AS-i ad-
dresses, reduce the space requirement and to build up logical
groupings.

■Design

Wiring and assembly

All the connections are either of the plug-in type or use the easy- installation insulation-piercing method.

The shaped cables for the 24 V auxiliary power supply which is used to control the contactors as well as the AS-Interface data cable must simply be inserted in the mounting plate. The com- pact starter is then cradled in the mounting plate and screwed tight. The compact starter and the mounting plate must be or- dered separately. The power for the main circuit is fed in via a power connector to be ordered separately (see Accessories un- der Selection and Ordering data).

Siemens IK PI · 2004

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