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Electronic Circuit Protector ESX50D-S (

1646

1

7

Operating data

DC 24 V (18...32 V)

adjustable ratings:

1 A through 10 A in 1 A steps

in ON condition:

typically 20 mA with the versoins -S100/ -S110

Visual status indication

multicoloured LED:

green

- load circuit connected

flashing (green/yellow):

- load current warning limit reached

yellow:

- overload or short circuit until dis-

connection

red:

- after disconnection due to overload,

short circuit or temperature

- after undervoltage disconnection in

ON condition of operating voltage

with automatic reset

flashing (red/OFF):

- upon changed rating adjustment

(only ESX50D-S110)

OFF:

- devices switched off via

ON/OFF switch

- device switched off via the commu-

nication interface

- no operating voltage with

ON/OFF switch in ON condition

Load circuit

Load output

power MOSFET switching output

(plus switching)

Load current warning limit

hysteresis

5 %

(adjustable from 5 % to 20 %)

see time/current characteristic

(see time/current characteristic)

Trip times

overload disconnection (IÜL) = 3000ms*

(adjustable from 50ms ... 10,000ms)

short circuit disconnection (IKS) = 100ms*

(adjustable from 50ms ... 1.000ms)

(see time/current characteristic)

Description

ESX50D-Sxxx

The type ESX50D-Sxx is an electronic circuit protector capable of

communication, which forms the intelligent power distribution system

controller CPC10 and the power distribution board SVS201-PWR

By means of its communication interface, the measuring values

recorded by the ESX50D-Sxx will be forwarded to the CPC10 via

the proprietary device bus ELBus® and then to a superordinate

programmable control unit. This allows flexible adjustment of the current

rating and its parameters to the requirements of the system and its

direct controllability. So the user can import the relevant information

regarding his DC 24 V voltage supply and process it accordingly.

The ESX50D-S is available in two different versions. The first version

has a rotary switch to allow current rating adjustment directly on the

circuit protector in a range from 1 A to 10 A. The second version

offers this adjustment feature via a field bus system or a USB service

interface.

At a width of only 12.5 mm the ESX50D-S provides selective protection

for all DC 24 V load circuits. This is achieved by a combination of

active electronic current limitation in the event of a short circuit and

by a parameterisable overload disconnection.

A typical application is the protection of DC 24 V switched mode

power supplies which are widely used in in factory automation today.

In the event of an overload, however, they turn down the output

voltage which is intended to power all connected loads. So if there is

a failure in a single load of the system, the supply voltage will break

down also in all other load circuits. Not only does this frequently cause

undefined fault conditions, but it can even lead to machine stoppages

or system downtimes. This is exactly where the ESX50D-S comes in

by responding to the overload conditions faster than the switched

mode power supply. The max. possible overcurrent is limited to

typically 1.4 times of the selected current rating (see table 1). This

allows switching on capacitive loads up to min. 20,000 µF, disconnection

is effected in the event of overload or short circuit or at undervoltage

and overheating.

Visual status and failure indication is by a multi-coloured LED on the

protector and is transmitted to the superordinate control unit via the

communication interfaces. The manual ON/OFF swtich on the device

as well as the control units which are programmable from memory

and which are connected to the communication interfaces allow the

start-up of selected load circuits.

As soon as the ESX50D-S detects an overload or short circuit in its

load circuit, it blocks the load output transistor after a parameterisable

period of time and disconnects the current flow in the faulty circuit.

After remedy of the failure, the load output of the ESX50D-S is re-ac-

tivated by an electronic reset signal or manually by actuating the ON/

OFF switch on the device.

* factory settings