1 description the new electronic overcurrent protection rex12 consists of the supply module em12-t and the single or double channel electronic circuit protector rex12-t which allows modular side-by-side mounting. the modules with a width of only 12.5 mm feature push-in technology including press release buttons and allow time-saving and maintenance-free wiring without tools. the supply module is designed for dc 24 v and 40 a and accommodates max. 10 mm2 with wire end ferrule as a plus (+) supply. on the load output side the circuit protector can be wired with 2.5 mm2. the new generation of electronic overcurrent protection rex12 combines flexibility with a compact design. it is exactly tailored to the needs of machine and panel builders. and what is more: no additional accessories are required when connecting the individual components electrically and mechanically. this helps save time and money! features l combination of supply module and electronic circuit protector l single and double channel selective load protection by means of electronic trip curve l no accessories required for connecting the components l width per channel only 12.5 mm (1-channel) or 6.25 mm (2-channel) l fixed current ratings from 1 a to 10 a l integral fail-safe element, adjusted to current rating l switching capacitive loads up to 20,000 f l manual on/off/reset momentary switch l clear status indication by means of led and signal contact si l connection via push-in terminals including orange press release buttons benefits l saves cost C no further accessories required l saves time through innovative and flexible mounting and connection technology l saves space C with a width of only 12.5 mm for two channels l provides flexibility through ease of mounting, disassembly and modular design rex12-tax-xxx circuit protectors rex12-ta1-107-dc24v-xa 1-channel rex12-ta2-107-dc24v-xa/xa 2-channel operating voltage u b dc 24 v (18...30 v) closed-circuit current i 0 rex12-ta1 1-channel in on condition typically 5 ma rex12-ta2 2-channel in on condition typically 8 ma reverse polarity protection yes power failure buffering time up to 10 ms current ratings i n fixed ratings: rex12-ta1 1 a, 2 a, 3 a, 4 a, 6 a, 8 a, 10 a rex12-ta2 2 a / 2 a, 4 a / 4 a, 6 a / 6 a visual status indication green: load circuit connected by led green/orange blinking: load current warning limit reached 80 % orange: overload or short circuit until disconnection red: - after disconnection due to overload or short circuit - after undervoltage release of operating voltage in on condition with autoreset off: device switched off by means of on/off momentary switch or no operating voltage load circuit load output power mosfet switching output (plus switching) load current typically 0.8 x i n warning limit (i wlimit ) hysteresis typically 5 % overload current typically i ol : i n x 1.05 t ol : 3s disconnection (i ol ) typically i ol : i n x 1.35 t ol : 0,5 s with trip times (t ol ) typically i ol : i n x 2.00 t ol : 0.1 s typically i ol : i n x 2.50 t ol : 0.012 s short circuit typically at short circuti (i sc ) t sc : 0,002 s 1) trip time (t sc ) (see time/current characteristic) 1) depends on the power suplly influence of ambient see temperature factor table temperature on overload disconnection and load current warning limit technical data (t amb = +23 c, u b = dc 24 v) approvals and standards approval authority standard rated voltage current rating range ul ul 2367 dc 24 v 1 a10 a ul ul60947 / culus508listed under preparation dc 24 v 1 a10 a overview of ordering number codes supply module em12-t01-001-dc24v-40a circuit protectors: 1-channel rex12-ta1-107-dc24v-1a rex12-ta1-107-dc24v-2a rex12-ta1-107-dc24v-3a rex12-ta1-107-dc24v-4a rex12-ta1-107-dc24v-6a rex12-ta1-107-dc24v-8a REX12-TA1-107-DC24V-10A circuit protectors: 2-channel rex12-ta2-107-dc24v-2a/2a rex12-ta2-107-dc24v-4a/4a rex12-ta2-107-dc24v-6a/6a www.e-t-a.de electronic circuit protector rex12 1646 4
2 fail-safe element i n : 1 a fail-safe i n : 1 a integral i n : 2 a fail-safe i n : 2 a blade fuse i n : 3 a fail-safe i n : 3.15 a adjusted to i n : 4 a fail-safe i n : 4 a related current rating i n i n : 6 a fail-safe i n : 6.3 a i n : 8 a fail-safe i n : 8 a i n : 10 a fail-safe i n : 10 a i n : 2 a / 2 a fail-safe i n : 2 a / 2 a i n : 4 a / 4 a fail-safe i n : 4 a / 4 a i n : 6 a / 6 a fail-safe i n : 6.3 a / 6.3 a voltage drop in load circuit at i n and at i n 70 % between line+ and load+ i n : 1 a typically 180 mv i n : 70 % typically 125 mv i n : 2 a typically 110 mv i n : 70 % typically 80 mv i n : 3 a typically 120 mv i n : 70 % typically 85 mv i n : 4 a typically 115 mv i n : 70 % typically 80 mv i n : 6 a typically 170 mv i n : 70 % typically 110 mv i n : 8 a typically 160 mv i n : 70 % typically 105 mv i n : 10 a typically 180 mv i n : 70 % typically 120 mv operating voltage off at typically u b < 16.0 v monitoring on at typically u b > 17.5 v with regard to low voltage with automatic on and off switching switch-on delay - with power on channel 1: typically 100 ms channel 2: typically 200 ms - when switching on via channel 1: typically 5 ms on/off momentary channel 2: typically 100 ms switch or - after undervoltage channel 1: typically 5 ms channel 2: typically 5 ms disconnection of - manually on the device with the load circuit on/off momentary switch - after an overload / short circuit disconnection with storage (no automatic reset) - temporarily at undervoltage - at no operating voltage switch-on of load circuit - momentary switch device can only be switched on on/off when operating voltage is applied - applying the device starts up with the condition operating voltage last stored reset function a blocked load output (blocked by overload / short circuit) can externally be reset by the on/off momentary switch leakage current in load typically < 1 ma circuit in off condition capacitive loads up to 20,000 f free-wheeling diode external free-wheeling circuit at inductive load (rating according to load) parallel connection of not allowed several load outputs status output status indication rex12-t minus switching signal output group signalling is implemented in connection with em12-t supply module screw terminals load+ push-in terminal pt 2.5 0.14 mm 2 ...2.5 mm 2 , flexible stripping length 8 mm...10 mm dimensions (w x h x d) 12.5 x 98,5 x 80 mm mass rex12-ta1-xxx 1-channel approx. 57 g rex12-ta2-xxx 2-channel approx. 58 g technical data (t amb = +23 c, u b = dc 24 v) general data housing material moulded mounting symmetrical rail to en 60715-35x7.5 ambient temperature -25 c...+60 c (without condensation, cf. en 60204-1) storage temperature -40 c...+70 c mounting temperature +5 c+60 c humidity 96 hrs / 95 % rh 40 c to iec 60068-2- 78-cab, climate class 3k3 to en 60721 vibration 3 g test to iec 60068-2-6, test fc degree of protection (iec 60529, din vde 0470) ip30 emc requirements noise emission en 61000-6-3 (emc directive, ce logo) susceptibility: en 61000-6-2 insulation co-ordination (iec 60934) 0.5 kv / pollution degree 2 dielectric strength max. dc 30 v (load circuit) insulation resistance n/a, only electronic disconnection (off condition) approvals ce logo, ul 2367, file # e306740, (ul60947 / ul 508, file # e...) under preparati on technical data (t amb = +23 c, u b = dc 24 v) type rex12 electronic circuit protector with pt connection technology mounting method t rail mounting design a 1 load output terminal per channel, fixed current ratings xa or xa/xa number of channels 1 1 channel 2 2 channels version 1 without physical isolation signal input 0 without signal input signal output: 7 status output operating voltage dc 24 v voltage rating dc 24 v current ratings 1 a (only 1-channel) 2 a (only 1-channel) 3 a (only 1-channel) 4 a (only 1-channel) 6 a (only 1-channel) 8 a (only 1-channel) 10 a (only 1-channel) 2 a/2 a (only 2-channel) 4 a/4 a (only 2-channel) 6 a/6 a (only 2-channel) rex12 - t a 1 - 1 0 7 - dc24v - 10 a example of 1-channel rex12 - t a 2 - 1 0 7 - dc24v - 6 a / 6 a example of 2-channel ordering number code - rex12-t preferred types standard current ratings (a) rex12-ta1 2 4 6 10 2/2 4/4 6/6 rex12-ta1-107-dc24v- x x x x rex12-ta2 2 4 6 10 2/2 4/4 6/6 rex12-ta2-107-dc24v- x x x preferred types electronic circuit protector rex12 electronic circuit protector rex12 www.e-t-a.de 1646 4
3 temperature factor / continuous duty time/current characteristic (t amb = +23 c, u b = dc C 24 v) 1000 100 trip time in seconds ...times rated current 10 1 0.1 0.01 0.001 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 i sc the time/current characteristic depends on the ambient temperature. in order to avoid premature trip, the rating of the circuit protector has to be multiplied with a temperature factor and has to be accounted for when mounted side-by-side (see chapter technical information). temperature factor table: ambient temperature [c] 0 10 23 40 50 60 temperature factor 1 1 1 0,95 0,90 0,85 note: when mounted side-by-side, the devices can carry max. 80 % of their rated load or a different rating has to be selected (see chapter technical information). note: with high temperatures, the load current warning threshold warn limit typically 0.8 x i n will be reduced in accordance with the temperature factor. dimensions with connection diagram: rex12-ta1-xxx and rex12-ta2-xxx circuit protectors preferred mounting postion rex12: horizontal germany 98,5 92 snap-on socket for rail en 60715-35x7,5 80 7,5 contact arm operating area installation area 12,5 rex12- ta2-1xx rex12- ta1-1xx dc24v dc24v xa xa xa 1-channel momentary switch for on/off and reset with integral status indication label e.g. from phoenix contact zbf-12 2-channels 2.1 load +l oad + 2.1 2.2 germany www.e-t-a.de electronic circuit protector rex12 1646 4 electronic circuit protector rex12
4 description C em12-t supply module operating voltage u b dc 24 v (18...30 v) operating current i b max. 40 a reverse polarity protection yes quiescent current i 0 typically 10 ma potential-free auxiliary max. dc 30 v / 0.5 a change-over contact min. 10 v / 1 ma group signalling si auxiliary contact, make contact contact: si (13) / si (14) normal condition: auxiliary contact closed - when on, load output connected - when off, load output disconnected fault condition: auxiliary contact open - after an overload or short circuit disconnection - after undervoltage release of operating voltage in on condition with autoreset - at no operating voltage u b in supply module insulation co-ordination 0.5 kv / pollution degree 2 power failure buffering time up to 10 ms screw terminals line+ push-in terminal pt 10 0.5 mm 2 ...10 mm 2 , flexible stripping length 18 mm...10 mm screw terminals 0 v / si 13 / si 14 push-in terminal pt 2.5 0.14 mm 2 ...2.5 mm 2 , flexible stripping length 8 mm...10 mm dimensions (w x h x d) 12.5 x 98 x 80 mm mass approx. 52 g number of circuit protectors to be mounted side-by-side to em12 rex12-ta1-x or rex12-ta2-x max. 16 pcs the em12-t supply module receives the dc 24 v supply voltage, e.g. from a switched mode power supply, and distributes it to the mounted circuit protectors via the integral connector arm of the rex12-t. the potential-free auxiliary contact in the em12-t indicates any detected failures through the circuit protector, e.g. to the superordinate control unit (cpu). technical data (t amb = +23 c, u b = dc 24 v) dimensions em12-txx supply module 98 91,5 snap-on socket for rail en 60715-35x7,5 label e.g. from phoenix contact zbf-12 80 12,4 em12- t01-001 dc24v 40 a 13 14 ov line +1 germany schematic diagram em12-txx with rex12-xx load+ 21 (22) line+1 em12-t max. 16 pcs rex12-t 0 v 13 14 type em12 supply module for rex, with pt connection technology mounting method t rail mounting version: communication, interface 01 analog signal additional functionality 0 without signal input: 0 without signal input signal output: 1 signal make contact operating voltage dc 24 v voltage rating dc 24 v current ratings 40 a em12 - t 01 - 0 0 1 - dc 24 v - 40 a ordering example ordering number code C em12 electronic circuit protector rex12 electronic circuit protector rex12 www.e-t-a.de 1646 4
5 application example: rex mounting on or removing from symmetrical rail connector arm can be closed push rex towards rail latch on enclosure downwards unlatch with srewdriver, tilt upwards and remove (connector arm can be closed) mount rex... side-by-side with em... remove rex... from rail mounting or actuation of the rex connector arm must only be effected at dead-voltage. for start-up the rex connector arm must be closed. instructions for installation application example: rex... replacement or disassembly unlatch with screwdriver pull out at right angles to the rail open connector arm open connector arm www.e-t-a.de electronic circuit protector rex12 1646 4 electronic circuit protector rex12
6 application example: rex... locked connector arms all dimensions without tolerances are for reference only. e-t-a reserves the right change specifications at any time in the interest of improved design, performance and cost effective - ness, 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. application example: em12-t with rex12-ta1 and rex12-ta2 application example: rex12(d)-t... distance between cable duct and connector arm germany 80 15 60 electronic circuit protector rex12 www.e-t-a.de 1646 4
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