ESX10-S Datasheet, PDF (1/6 Pages) ETAL Group – Selective load protection, electronic trip curve

Electronic circuit protector ESX10-Sxxx-DC24V-1A-10A
Description
The model ESX10-Sxxx extends our product group of electronic
overcurrent protection devices for DC 24 V applications.
At a width of only 12.5mm it provides selective protection for all DC
24 V load circuits. This is achieved by a combination of active elec-
tronic current limitation in the event of a short circuit and overload
disconnection typically from 1.2 times rated current. The ESX10-S is
a plug-in type and thus allows quick and easy installation for groups
of devices with several circuits on the power distribution systems
Module 17plus and SVSxx.
DC 24 V switch-mode power supplies are widely used in 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.
ESX10-S
This is exactly where the ESX10-S comes in by responding to the
Technical data (T_amb = 25 °C, U_B = DC 24 V)
overload conditions faster than the switch-mode power supply. The
max. possible overcurrent is limited to typically 1.4 times rated current
(see table 1). This allows switching on capacitive loads of up to 20,000
Operating data
Operating voltage U_B
DC 24 V (18...32 V)
µF, but a disconnection will only be effected in the event of an over- Current ratings I_N
load or short circuit. For adjustment to the load conditions the current
adjustable ratings:
1 A through 10 A in 1 A steps
rating can be selected by means of a rotary switch from 1A to 10A.
Status and failure indication is by means of a multi-coloured LED, an
integral short circuit proof status output (single or group alarms) or via
a potential-free relay contact (change-over contact). Remote actua-
Standby current I₀

in ON condition:
typically 25 mA with version -103/-115/-125
typically 20 mA with version -114/-117/-
124/-127
tion is possible via a remote reset signal. The manual ON/OFF switch Visual status
multicoloured LED:
on the device itself allows start-up of certain individual load circuits. indication
green:
As soon as the ESX10-S detects overload or short circuit in its load
- load circuit connected
circuit, it blocks the load output transistor and disconnects the current _{ flashing (green/yellow):}
flow in the faulty circuit. After remedy of the failure, the load output of
- load current warning limit reached 80%
the ESX10-S is re-activated by an electronic reset signal or manually _{ yellow:}
by actuating the ON/OFF switch on the device.
- overload or short circuit until
US patent number: US 6,490,141 B2
disconnection
 red:
 - after disconnection due to overload,
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Features and Benefits

short circuit or temperature
- after undervoltage disconnection in ON
condition of operating voltage with auto-
l Selective load protection, electronic trip curve
matic reset
l All types of loads can be connected (DC 24 V motors upon
request)


flashing (red/OFF):
- upon changed rating adjustment
l Active current limitation when switching on capacitive loads
up to min. 20,000 µF and in case of overload/short circuit
l Whole-number adjustable current ratings from 1A to 10 A


OFF:
- devices switched off via
ON/OFF switch
by means of rotary switch
- no operating voltage with ON/OFF
l Reliable overload disconnection typically from 1.2 x I_N even with
long load lines or small cable cross sections
Load circuit
switch in ON condition
l Manuel ON/OFF switch (S1)
l Clear status indication by means of LED, electronic status output
SF or signal output F (potential-free auxiliary contact)
l Electronic reset input RE, control input IN
l Integral fail-safe-element
l Width per channel only 12.5 mm
l Plug-in type mounting on power distribution system Module
17plus and SVSxx.
Approvals
Load output

power MOSFET switching output
(plus switching)
Load current
warning limit (I_Limit)
hysteresis
typically 0.8 x I_N
typically 5%
Overload disconnection typically 1.2 x I_N (1.05...1.35 x I_N)
(I_OL)
(see time/current characteristic)
Short circuit current (I_SC) active current limitation with I_SC =
typically 2.5 x I_N , 1 A
typically 1.4 x I_N, 2 A -10 A
(see time/current characteristic)
Authority
UL
UL
Standard Rated voltage
UL 2367 DC 24 V
UL 508
DC 24 V
C22.2 No 14
Current ratings
1...10 A
1...10 A
Trip times


Temperature

disconnection
hysteresis
at overload disconnection (I_OL) = typ. 3 s
at short circuit current (I_SC) = typically 0.1 s
(see time/current characteristic)
internal temperature monitoring with
monitoring electronic disconnection
typically +100 °C
typically 10 °C
Operating voltage
OFF at typically U_B < 16.0 V
monitoring with regard ON at typically U_B> 17.5 V
to low voltage with automatic ON and OFF switching
1646
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