E-1048-8D
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Smart Power Relay E-1048-8D. Description l rova The Smart Power Relay E-1048-8D. is a remotely controllable electronic load disconnecting relay with two functions in a single unit: ● electronic relay ● electronic overcurrent protection The 4 pin DICE version is designed for use with standard automotive relay sockets. A choice of current ratings is available from 1 A through 30 A. An operating voltage range of DC 9...32 V allows the connection of DC 12 V and DC 24 V loads. with pp e1 a In order to switch and protect loads remotely, it has until now been necessary to connect several discreet components together: - an electro-mechanic relay, control cable and integral contact to close the load circuit - an additional protective element (circuit breaker or fuse) for cable or equipment protection Now type E-1048-8D. combines these two functions in a single unit, thus minimising the number of connections in the circuit and thereby reducing the risk of failures. E-1048-8D. DICE version Technical Data (Tamb. = 25 °C, UN = DC 24 V) Power supply LINE + Type Applications Type E-1048-8D. is suited to all applications with DC 12 V or DC 24 V circuits, where magnetic valves, motors or lamp loads have to be switched, protected or monitored: - road vehicles (utility vehicles, buses, special vehicles) - construction and agricultural machinery - rail vehicles - marine industry (ships, boats, yachts etc.) The Power Relay is also suitable for industrial use (process control, machine-building, engineering) as an electronic coupling relay between PLC and DC 12 V or DC 24 V load ● ● ● ● ● Integral power electronics provide a wear-resistant switching function, insensitive to shock, vibration and dust. Compared to electro-mechanical relays, only a fraction of the closed-circuit current or switching current is needed. This is important for battery buffered load circuits which have to remain controlled even with the generator off line. The extremely low induced current consumption of less than 100 μA is absolutely necessary for battery buffered applications. The load circuit is disconnected in the event of a short circuit (ENTRY version) or overload/short circuit (ENTRYprotect version). For switching and monitoring loads of 30 A plus it is possible to connect several units in parallel. Uniform power distribution between units must be ensured by symmetrical design of the supply cables (length and cross section). Coloured label, e. g. red = 10 A, see ordering information. Issue D Load circuit LOAD Load output Max. current rating IN Types of loads Current rating range IN ENTRY version ENTRYprotect version Features ● Voltage ratings UN Operating voltage US DC power supply with small R i battery and generator etc. DC 12 V/DC 24 V DC 9...32 V Power MOSFET, High Side Switch (HSS) or Low Side Switch (LSS) 30 A resistive, inductive, capacitive, lamp loads, motors (depending on duration of inrush current) 1 A...30 A (fixed ratings) up to 85 °C ambient without load reduction, 25 A...30 A up to 80 °C Load output with short circuit protection Load output with short circuit and overload protection (typically 200 ms at ILoad > typically 1.3 x IN) IN = 1 A...10 A: see trip curve 1 IN = 15 A...30 A: see trip curve 2 Induced current consumption I0 of the unit (OFF condition) typically 100 μA Typical voltage drop UON at rated current IN (at 25 °C) IN UON IN 1A 50 mV 10 A 2A 55 mV 15 A 3A 60 mV 20 A 5A 80 mV 25 A 7.5 A 90 mV 30 A Switching point typically 1.3 x IN UON 110 mV 70 mV 90 mV 120 mV 140 mV (-40 °C...+85 °C: 1.1...1.5 x IN) typically 200 ms with switch-on onto overload and/or load increase on duty IN = 1 A...10 A: typically 60 A IN = 15 A...30 A: typically 200 A Temperature disconnection power transistor > 150 °C After trip - resettable via external control signal (low-high) at control input IN+ or IN- reset of supply voltage Parallel connection of channels for loads of 30 A plus, several units of identical current ratings may be connected in parallel. To ensure equal distribution of current between units, symmetrical design of the supply feed is necessary (length and cross section). Leakage current in OFF condition IN = 1 A...10 A: max. 100 μA IN = 15 A...30 A: max. 500 μA (only ENTRYprotect) Trip time (standard curve) (only ENTRYprotect) Current limitation www.e-t-a.de 7 - 27 7

Smart Power Relay E-1048-8D. Technical Data (TU = 25 °C, US = DC 24 V) (TU = ambient temperature at UN) Technical Data (TU = 25 °C, US = DC 24 V) (TU = ambient temperature at UN) Approvals CE, e1 logo: Free-wheeling diode for connected load integral IN = 1 A...10 A: max. 40 A IN = 15 A...30 A: max. 100 A Delay time ton / toff (resistive load) typically 0.5 ms / typically 1.5 ms (EMC filter in control input) Short circuit, overload in load circuit - disconnection of load - no automatic re-start - after remedy of the fault unit has to be reset via control input IN+ Control input IN+ Ordering...

©MMK Smart Power Relay E-1048-8D. Typical time/current characteristics OA = 25 °C) Connection diagrams DICE version Trip curve 1 "ENTRYprotect" .. times rated current I Trip curve 2 "ENTRYprotect" .times rated current I. This is a metric design and millimeter dimensions take precedence (7 control input control input Pin selection DICE version (4 pin) control input load output 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...