E-T-A Automation Products

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www.e-t-a.de Electronic Circuit Protector ESX10 1642 1 4 Description Technical data (T ambient = 25 °C, operating voltage U S = DC 24 V) ESX10 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. 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. 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. 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 Features l Selective load protection, electronic trip characteristics. l Active current limitation for safe connection of capacitive loads up to 75,000 µF and on overload/short circuit. l Current ratings 0.5 A...12 A. l Reliable overload disconnection with 1.1 x I N plus, even with long load lines or small cable cross sections (see table 3). l Manual ON/OFF button (S1). l Clear status and failure indication through LED, status output SF or Si contact F. l Electronic reset input RE (option). l Integral fail-safe element. l Width per unit only 12.5 mm. l Plug-in mounting utilising power distribution system Module 17plus or SVSxx optionally (see product group Power distribution systems) l Additional versions with ATEX approval available. Marking: II 3G Ex nA IIB T4 Gc X ESX10-...-E Please observe separate operating instructions: Operating data Operating voltage U S DC 24 V (18...32 V) Current rating I N fixed current ratings: 0.5 A, 1 A, 2 A, 3 A, 4 A, 6 A, 8 A, 10 A, 12 A Closed current I 0 ON condition: typically 20...30 mA depending on signal output Status indication l multicolour LED: by means of 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: - unit electronically disconnected - load circuit/Power-MOSFET OFF OFF: - manually switched off (S1 = OFF) or device is dead - undervoltage (U S < 8 V) - after switch-on till the end of the delay period l status output SF (option) l potential-free signal contact F (option) l ON/OFF/ condition of switch S1 Load circuit Load output Power-MOSFET switching output (high side switch) Overload disconnection typically 1.1 x I N (1.05...1.35 x I N ) Short-circuit current I K active current limitation (see table 1) Trip time see time/current characteristics for electronic disconnection typically 3 s at I Load > 1.1 x I N typically 3 s...100 ms at I Load > 1.8 x I N (or 1.5 x I N /1.3 x I N ) Temperature disconnection internal temperature monitoring with electronic disconnection Low voltage monitoring load output with hysteresis, no reset necessary load "OFF" at U S < 8 V Starting delay t start typically 0.5 sec after every switch-on and after applying U S 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

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