E-1048-8I
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Smart Power Relay E-1048-8I. Description The Smart Power Relay E-1048-8I.- is a remotely controllable electronic load disconnecting relay with three functions in a single unit: ● electronic relay ● electronic overcurrent protection ● status indication The 7 pin INLINE version is designed for use with various E-T-A terminal blocks, e. g. 17-P10-Si. A choice of current ratings is available from 1 A through 20 A. An operating voltage range of DC 9...32 V allows the connection of DC 12 V and DC 24 V loads. 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 - a device for current measurement (shunt) Now type E-1048-8I. combines all these functions in a single unit, thus minimising the number of connections in the circuit and thereby reducing the risk of failures. E-1048-8I. INLINE version Technical Data (TU = 25 °C, US = DC 24 V) (TU = Power supply LINE + Type Voltage ratings UN Operating voltage US: Applications Type E-1048-8I. 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) - 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 and vibration. Only a fraction of the control power needed by electro-mechanical relays is required for switching loads. 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 1 mA is absolutely necessary for battery buffered applications. The load circuit is disconnected in the event of an overload or short circuit, the trip curve is also suitable for smaller motor loads. The load circuit is permanently monitored for wire breakage. Two status outputs for control signal AS and group signal SF provide status indication. For processing the actual value of the current flow in a power management system an analogue output from 0 to 5 V is provided. This voltage signal may also be used as an input to a control circuit or to switch off the unit by means of external control in the event of low load current value. For switching and monitoring loads of 20 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 (060212) DC power supply with small R i battery and generator etc. DC 12 V/DC 24 V DC 9...32 V Load circuit LOAD Load output Max. current rating IN Types of loads Current rating range IN Features ● ambient temperature at UN) Power MOSFET, high side switching 20 A resistive, inductive, capacitive, lamp loads, motors (depending on duration of inrush current) 1 A...15 A (fixed ratings) up to 85 °C ambient without load reduction, 20 A up to 70 °C. Two basic versions with factory preset ratings: version 1: 1 A/2 A/3 A/5 A/7.5 A/10 A version 2: 15 A/20 A Induced current consumption I0 of the unit (OFF condition) < 1 mA Typical voltage drop UON at rated current IN (at 25 °C) IN 1 2 3 5 A A A A 50 55 60 80 UON mV mV mV mV Switching point IN 7.5 A 10 A 15 A 20 A UON 90 mV 110 mV 60 mV 60 mV typically 1.3 x IN (-40 °C...+85 °C: 1.1...1.5 x IN) typically 200 ms with switch-on onto overload and/or load increase on duty Current limitation version 1: typically 75 A version 2: typically 350 A Temperature disconnection power transistor > 150 °C After trip - resettable via external control signal (low-high) at control input IN+ - reset of supply voltage Parallel connection of channels for loads of 20 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 version 1: max. 100 μA version 2: max. 500 μA Free-wheeling diode for connected load integral version 1: max. 40 A version 2: max. 100 A Trip time www.e-t-a.de (standard curve) 7 - 21 7

Smart Power Relay E-1048-8I. Technical Data (TU = 25 °C, US = DC 24 V) (TU = ambient temperature at UN) Delay time ton/toff (resistive load) Technical Data (TU = 25 °C, US = DC 24 V) (TU = ambient temperatureat UN) Temperature range ambient temperature typically 5 ms / typically 1.5 ms (EMC filter in control input) Wire breakage monitoring in wire breakage thresholds: ON and OFF in OFF-condition (version 1): condition of load Rload > typically 100 kΩ in OFF-condition (version 2): Rload > typically 10 kΩ in ON-condition: Iload < typically 0.2 x IN indication via group fault signalisation SF...

Smart Power Relay E-1048-8I. Smart Power Relay DC 12 V/24 V - 1 A...20 A in INLINE version Housing / temperature range 3 with housing / 70 °C (without moisture condensation) 4 with housing / -40 °C...+85 °C (70 °C at IN = 20 A) C with control input (+ control 8.5...32 V) LEDs 0 without LEDs 3 2 LEDs: AS yellow, SF red Status output minus-switching A without D with AS and SF Contents of group fault signal SF/ LED indication SF 0 without 1 short circuit / overload 3 short circuit / overload + wire breakage on 4 short circuit / overload + wire breakage off + wire breakage on Analogue output V0...

©i-TT^ Smart Power Relay E-1048-81. Typical time/current characteristics (TA = 25 °C) .. times rated current I. .. times rated current I.