Electronic Circuit Protector ESX10
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- Norah Hicks
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1 Electronic Circuit Protector ESX0 Description Electronic circuit protector type ESX0 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 ESX0 responds much faster to overload or short circuit conditions than the switch-mode power supply. This is achieved by active current limitation. The ESX0 limits the highest possible current to values between.3 to.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 ESX0 can be selected in fixed values from 0.5 A...2 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 ESX0, with a width of only 2.5 mm, can be plugged into the E-T-A power distribution socket Module 7plus 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. Features 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...2 A. Reliable overload disconnection with. x I N plus, even with long load lines or small cable cross sections (see table 3). Manual ON/OFF button (S). Clear status and failure indication through LED, status output SF or Si contact F. Electronic reset input (option). Integral fail-safe element. Width per unit only 2.5 mm. Plug-in mounting utilising power distribution system Module 7plus or SVSxx optionally (see product group Power distribution systems) Additional versions with ATEX approval available. Marking: II 3G Ex na IIB T4 Gc X ESX0-...-E Please observe separate operating instructions: ESX0 Technical data (T ambient = 25 C, operating voltage U S = DC 24 V) Operating data Operating voltage U S DC 24 V ( V) Current rating I N fixed current ratings: 0.5 A, A, 2 A, 3 A, 4 A, A, 8 A, 0 A, 2 A Closed current I 0 ON condition: typically ma depending on signal output Status indication multicolour LED: by means of GEN: 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 D: - unit electronically disconnected - load circuit/power-mosfet OFF OFF: - manually switched off (S = OFF) or device is dead - undervoltage (U S < 8 V) - after switch-on till the end of the delay period status output SF (option) potential-free signal contact F (option) ON/OFF/ condition of switch S Load circuit Load output Power-MOSFET switching output (high side switch) Overload disconnection typically. x I N ( x I N ) Short-circuit current I K active current limitation (see table ) Trip time see time/current characteristics for electronic disconnection typically 3 s at I Load >. x I N typically 3 s...00 ms at I Load >.8 x I N (or.5 x I N /.3 x I N ) Temperature disconnection internal temperature monitoring with electronic disconnection Low voltage monitoring load output Starting delay t start with hysteresis, no reset necessary load OFF at U S < 8 V 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 203/
2 Electronic Circuit Protector ESX0 Technical data (T ambient = 25 C, operating voltage U S = DC 24 V) Technical data (T ambient = 25 C, operating voltage U S = DC 24 V) Status output SF ESX0-04/-24 plus-switching signal output, connects U S to terminal 2 of module 7plus nominal data: DC 24 V / max. 0.2 A (short circuit proof) status output is internally connected to with a 0 kohm resistor ESX0-04/-0/ -24 (signal status OUT), at U S = +24 V +24 V = S is ON, load output connected through 0V = S is ON, load output blocked and/or switch S is OFF ESX0-27 (signal status OUT inverted), at U S = +24 V +24 V = S is ON, load output blocked, red LED lighted 0 V = S is ON, load output connected through and/or switch S is in OFF position OFF condition 0 V level at status output when: switch S is in ON position, but device is still in switch-on delay switch S is OFF, or control signal OFF, device is switched off no operating voltage U S Signal output F ESX0-03/-5/-25 potential-free signal contact max. DC 30 V/0.5 A, min. 0 V/0 ma ON condition LED green voltage U S applied, switch S is in ON position no overload, no short circuit OFF condition LED off device switched off (switch S is in OFF position) no voltage U S applied Fault condition LED orange overload condition >. x I N up to electronic disconnection Fault condition LED red electronic disconnection upon overload or short circuit device switched off with control signal (switch S is in ON position) ESX0-0 single signal, make contact contact SC/SO-SI open ESX0-02 single signal, break contact contact SC/SO-SI closed ESX0-03 group signal change-over contact contact SC-SO open, SC-SI closed ESX0-05/-0/-5/-25 group signal, make contact contact SC-SO open Fault signal output fault conditions: no operating voltage U S ON/OFF switch S is in OFF position red LED lighted (electronic disconnection) Table : voltage drop, current limitation, max. load current current rating I N typically voltage drop U ON at I N active current limitation (typically) max. load current at 00 % ON duty T U = 40 C T U = 50 C 0.5 A 70 mv.8 x I N 0.5 A 0.5 A A 80 mv.8 x I N A A 2 A 30 mv.8 x I N 2 A 2 A 3 A 80 mv.8 x I N 3 A 3 A 4 A 00 mv.8 x I N 4 A 4 A A 30 mv.8 x I N A 5 A 8 A 20 mv.5 x I N 8 A 7 A 0 A 50 mv.5 x I N 0 A 9 A 2 A 80 mv.3 x I N 2 A 0.8 A Attention: when mounted side-by-side without convection the ESX0-0.. should not carry more than 80 % of its rated load with 00 % ON duty due to thermal effects. Reset input ESX0-24/-25 voltage: max. + DC 32 V high > DC 8 V DC 32 V low DC 3 V > 0 V power consumption typically 2. ma (+DC 24 V) min. pulse duration typically 0 ms Reset signal The electronically blocked ESX0-24/-27 (= terminal 3,4 or 2 may remotely be reset via an external of Module 7plus) momentary switch due to the falling edge of a +24 V pulse. Caution: unused slots The reset signal will be fed in terminal 3, 4 have to be fitted with or 2 of Module 7plus and is internally jumpers pre-wired. The reset simultaneously affects all blocked ESX0-24/-27 channels of the power distribution system, all switched on ESX0-24/-27 channels remain unaffected. With type ESX0-25 the reset only affects the device concerned. By connecting the individual terminals 2 of the Module 7plus a joint reset signal for all ESX0-25 may be generated. Control input IN+ ESX0-5 see reset input Control signal IN+ +24 V level (HIGH): device will be switched on by a remote ON/OFF signal 0 V level (LOW): device will be switched off by a remote ON/OFF signal Switch S ON/OFF unit can only be switched on with S if a HIGH level is applied to IN+ General data Fail-safe element: backup fuse for ESX0 not required because of the integral redundant fail-safe element Blade terminals.3 mm to DIN 4244-A Housing moulded Mounting plug-in mounting utilising power distribution system Module 7plus or SVSxx Ambient temperature C (without condensation, see EN 0204-) Storage temperature C Humidity 9 hrs/95 % RH/40 C to IEC , test Cab. climate class 3K3 to EN 072 Vibration 3 g, test to IEC test Fc Degree of protection housing: IP30 DIN terminals: IP00 DIN EMC emission: EN (EMC directive, CE logo) susceptibility: EN Insulation co-ordination 0.5 kv/2 pollution degree 2 (IEC 0934) re-inforced insulation in operating area dielectric strength max. DC 32 V (load circuit) Insulation resistance (OFF condition) n/a, only electronic disconnection Approvals UL 237, File # E30740 Solid State Overcurrent Protectors UL 508, File # E CSA C22.2 No: 4, File 8 CE logo Dimensions (W x H x D) 2.5 x 70 x 0 mm Mass approx. 40 g /4
3 Electronic Circuit Protector ESX0 Ordering configuration for ATEX versions:...-e Type No. ESX0 Electronic Circuit Protector for DC 24 V applications Version standard, without physical isolation in the event of a failure Signal input 0 without signal input with control input IN+ 2 with reset input Signal outputs 0 without 3 signal output F (group signal, change-over) 4 status output SF 5 signal output F (group signal, N/O) Operating voltage DC 24 V rated voltage DC 24 V Current rating A Approvals E ATEX ESX DC 24 V - A E ordering example Approvals Authority Voltage ratings Current ratings UL 237 DC 24 V A UL 508 DC 24 V A CSA C22.2 No: 4 DC 24 V A TÜV Süd/ATEX * DC 24 V A approval GL part VI part 7 * DC 24 V A IEC/EN / II 3G Ex na IIB T4 Gc X -4/-5 * auch mit Moduls 7plus Schematic diagram ESX0-24 ESX0-24- Ordering information Type No. ESX0 Electronic Circuit Protector for DC 24 V applications Version standard, without physical isolation in the event of a failure Signal input 0 without signal input with control input IN+, only ESX0-5 2 with reset input, only ESX0-24 Signal outputs 0 without, only ESX signal output F (group signal, change-over) only ESX status output SF (+24 V = OK), only ESX0-04, ESX signal output F (group signal, N/O) Operating voltage DC 24 V rated voltage DC 24 V Current rating 0.5 A A 2 A 3 A 4 A A 8 A 0 A 2 A ESX DC 24 V - A ordering example LINE (+) DC 24 V R sense LOAD (+) load output electronic control unit (-) Terminal wiring diagram ESX0-24 ESX0 S ON/OFF status indication green/orange/red reset input reset input SF status output Description of ESX0 signal inputs and outputs (wiring diagrams) see next page. Preferred types Germany Elektronischer Sicherungsautomat Electronic Circuit Protector ESX0-xx-DC 24 V-xxA UL 237 cul Preferred types Standard current ratings (A) ESX0-03-DC24V x x x x x x x x Please note: The user should ensure that the cable cross sections of the relvant load circuit are suitable for the current rating of the ESX0 used. Automatic start-up of machinery after shut down must be prevented (Machinery Directive 98/37/EG and EN 0204-). In the event of a short circuit or overload the load circuit will be disconnected electronically by the ESX0. 3 Reset IN 4 SF 2 LOAD /
4 ok I > Control unit on / off SI Electronic Circuit Protector ESX0 EG-declaration of Conformity for ATEX-version ESX0-TA/-TB-...-E Dimensions Accessories Module 7plus For technical data see section Power Distribution Systems operating area slot for fitting labels from Phoenix, Weidmüller, Wieland mounting area LINE (+) Gnd 7 plus LOAD (+) x.8=40.8 x.27= reverse plug-in protection blade terminals DIN slot for busbar G-profile EN G32 symmetrical rail EN x max. 38 max..50 off on A This is a metric design and millimeter dimensions take precedence ( mm ) inch ok Line Line module right-side terminal block left-side terminal block /4
5 Electronic Circuit Protector ESX0 Time/Current characteristic curve (T A = 25 C) disconnection typically. x I N.8 x I N The trip time is typically 3 s in the range between. and.8 x I N *). trip time in seconds current limitation typically.8 x I N IK...times rated current Electronic current limitation occurs at typically.8 x I N *) which means that under all overload conditions (independent of the power supply and the resistance of the load circuit) the max. overload before disconnection will not exceed.8 x I N *) times the current rating. Trip time is between 00 ms (short circuit current I K ) and 3 sec (at overload with high line attenuation). Without this current limitation a considerably higher overload current would flow in the event of an overload or short circuit. *) current limitation typically.8 x I N times rated current at I N = 0.5 A... A current limitation typically.5 x I N times rated current at I N = 8 A or 0 A current limitation typically.3 x I N times rated current at I N = 2 A Table 3: Reliable trip of ESX0 Reliable trip of ESX0 with different cable lengths and cross sections Resistivity of copper ρ 0 = (Ohm x mm 2 ) / m U S = DC 9.2 V (= 80 % v. 24 V) voltage drop of ESX0 and tolerance of trip point (typically. x I N = x I N ) have been taken into account. ESX0-selected rating I N (in A) 3 e. g. trip current I ab =.25 x I N (in A) ESX0 trips after 3 s R max in Ohm = (U S / I ab ) The ESX0 reliably trips from 0 Ohm to max. circuitry resistance R max Cable cross section A in mm cable length L in meter (= single length) cable resistance in Ohm = (R 0 x 2 x L) / A Example : max. length at.5 mm 2 and 3 A 24 m Example 2: Example 3: max. length at.5 mm 2 and A 0 m mixed wiring: R = 40 m in.5 mm 2 and R2 = 5 m in 0.25 mm 2 : (Control cabinet sensor/actuator level) R = 0.95 Ohm, R2 = 0.7 Ohm Total (R + R2) =. Ohm 203/
6 Electronic Circuit Protector ESX0 Table 2: ESX0 - product version version signal input signal output signal output F ESX control input ON/OFF +24 V Control IN+ reset input +24 V group signal N/O group signal change-over status output SF status OUT +24 V = OK x -04 x -5 x x -24 x x -25 x x ESX0 Signal inputs / outputs (wiring diagram) ESX0 signal inputs / outputs (wiring diagrams) Signal contacts are shown in the OFF or fault condition. ESX0-00 without signal input/output ESX0-03 without signal input with signal output F (group signal, change-over) ESX0-04 without signal input with status output SF (+24 V = load output ON) ESX with reset input (+DC 24 V ) with status output SF (+24V = load output ON) SF 3 SC 4 SO 2 SI 3 SC 4 SO 2 SF Signal operating condition: SC/SO closed, SC-SI open fault condition: SC/SO open, SC-SI closed ESX with control input IN+ (+DC 24 V) with signal output F (group signal, N/O) ESX with reset input ( +DC 24 V ) with signal output F (group signal, N/O) Reset IN 3 SC 4 SO 2 IN + Signal Control IN 3 SC 4 SO 2 3 Signal 4 operating condition: SF +24 V = OK fault condition: SF 0V Reset IN operating condition: SC-SO closed fault condition: SC-SO open operating condition: SF +24V = OK fault condition: SF 0V operating condition: SC-SO closed fault condition: SC-SO open This is a metric design and millimeter dimensions take precedence ( mm ) inch All dimensions without tolerances are for reference only. In the interest of improved design, performance and cost effectiveness the right to make changes in these specifications without notice is reserved. Product markings may not be exactly as the ordering codes. Errors and omissions excepted /4
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