Electronic Circuit Protector ESX10
Description
Electronic circuit protector type ESX10 is designed to ensure selective
disconnection of DC 24 V load systems.
DC 24 V power supplies, which are widely used in industry today, will
shut down the output in the event of an overload with the result that
one faulty load in the system can lead to complete disconnection of
all loads. As well as an unidentified failure this also means stoppage
of the whole system.
Through selective disconnection the ESX10 responds much faster
to overload or short circuit conditions than the switch-mode power
supply. This is achieved by active current limitation. The ESX10 limits
the highest possible current to values between 1.3 to 1.8 times the
selected rated current of the circuit protector. Thus it is possible to
switch on capacitive loads of up to 75,000 µF lamp loads, but they
are disconnected only in the event of an overload or short circuit.
ESX10
(T
= 25 °C, operating voltage U = DC 24 V)
S
Technical data
ambient
For optimal alignment with the characteristics of the application the
current rating of the ESX10 can be selected in fixed values from
0.5 A...12 A. Failure and status indication are provided by a multicolour
LED and an integral short-circuit-proof status output or a potential-free
signal contact.
Operating data
Operating voltage US
Current rating IN
DC 24 V (18...32 V)
fixed current ratings: 0.5 A, 1 A, 2 A, 3 A,
4 A, 6 A, 8 A, 10 A, 12 A
The ESX10, with a width of only 12.5 mm, can be plugged into the
E-T-A power distribution socket Module 17plus ensuring ease of
installation and saving space in control cabinets.
Closed current I0
ON condition: typically 20...30 mA
depending on signal output
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Status indication
by means of
multicolour LED:
GREEN:
unit is ON, power-MOSFET
is switched on
- status output SF ON, supplies +DC 24 V
ORANGE:
in the event of overload or short circuit
until electronic disconnection
RED:
Upon detection of overload or short circuit in the load circuit, the
MOSFET of the load output will be blocked to interrupt the
current flow. The MOSFET and the load circuit may be re-activated
via the remote electronic reset input or manually by means of the
ON/OFF button. When starting up the system, the load circuit may
also be manually disconnected.
US patent number: US 6,490,141 B2
- unit electronically disconnected
- load circuit/Power-MOSFET OFF
OFF:
4
- manually switched off (S1 = OFF)
or device is dead
Features
- undervoltage (US < 8 V)
- after switch-on till the end of the
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Selective load protection, electronic trip characteristics.
Active current limitation for safe connection of capacitive loads
up to 75,000 µF and on overload/short circuit.
Current ratings 0.5 A...12 A.
Reliable overload disconnection with 1.1 x IN plus, even with long
load lines or small cable cross sections (see table 3).
Manual ON/OFF button (S1).
Clear status and failure indication through LED, status output SF
or Si contact F.
Electronic reset input RE (option).
Integral fail-safe element.
Width per unit only 12.5 mm.
Plug-in mounting utilising power distribution system Module 17plus
or SVSxx optionally (see product group Power distribution systems)
Additional versions with ATEX approval available.
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ꢀ
ꢀ
delay period
status output SF (option)
potential-free signal contact F (option)
ON/OFF/ condition of switch S1
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ꢀ
ꢀ
ꢀ
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Load circuit
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Load output
Power-MOSFET switching output
(high side switch)
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Overload disconnection
Short-circuit current IK
Trip time
typically 1.1 x IN (1.05...1.35 x IN)
active current limitation (see table 1)
see time/current characteristics
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for electronic disconnection typically 3 s at ILoad > 1.1 x IN
typically 3 s...100 ms at ILoad > 1.8 x IN
(or 1.5 x IN/1.3 x IN)
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Temperature disconnection internal temperature monitoring with
electronic disconnection
Marking:
ESX10-...-E
II 3G Ex nA IIB T4 Gc X
Please observe separate operating instructions:
Low voltage monitoring
load output
with hysteresis, no reset necessary
load “OFF” at US < 8 V
Starting delay tstart
typically 0.5 sec after every switch-on
and after applying US
Disconnection of load circuit electronic disconnection
Free-wheeling circuit
external free-wheeling diode
recommended with inductive load
Several load outputs must not be connected in parallel
1642
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