E-1048 Datasheet, PDF (1/4 Pages) ETAL Group – Integral power electronics provide a wear-resistant switching function, insensitive to shock, vibration and dust

Smart Power Relay E-1048-8C...
Description
The Smart Power Relay E-1048-8C – is a remotely controllable electronic
load disconnecting relay with three functions in a single unit:
l electronic relay
l electronic overcurrent protection
l status and monitoring functions
The 7 pin CUBIC version is designed for use with standard automotive
relay sockets. A choice of current ratings is available from 1 A through
25 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)
E-1048-8C CUBIC version
Now type E-1048-8C combines all these functions in a single unit,
thus minimising the number of connections in the circuit and
thereby reducing the risk of failures.
Technical Data (TA = 25 °C, UN)
Power supply LINE +
Applications
Type E-1048-8C 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 and monitored:
- road vehicles (utility vehicles, buses, special vehicles)
Type

Voltage ratings U_N
Operating voltage U_S:
Closed-circuit current
I₀ in the OFF condition
Load circuit LOAD
DC power supply with small R _i
battery and generator etc.
DC 12 V/DC 24 V
DC 9...32 V
< 1 mA
- rail vehicles
Load output Power MOSFET, high side switching
- marine industry (ships, boats, yachts etc.)
HSS
The Power Relay is also suitable for industrial use (process control, Current rating range I_N 1 A ... 25 A (fixed rating)
machine-building, engineering) as an electronic coupling relay
without load reduction up to 85° C
between PLC and DC 12 V or DC 24 V load
(1 A...20 A), 25 A bis 60 °C ambient
temperature
Features


Types of loads
I_N = 1 A ... 10 A: trip curve 1
I_N = 15 A ... 25 A: trip curve 2
resistive, inductive, capacitive, lamp
l Integral power electronics provide a wear-resistant switching
function, insensitive to shock, vibration and dust.
l Compared to electro-mechanical relays, only a fraction of the

loads, motors (depending on duration

of inrush current)
Typical voltage drop U_ON at rated current I_N ¹⁾
closed-circuit current or switching current is needed. This is
I_N
U_ON
I_N
U_ON
important for battery buffered load circuits which have to remain _{1 A}
50 mV
10 A
110 mV
controlled even with the generator off line.
2A
55 mV
15 A
70 mV
l The extremely low induced current consumption of less than 1 mA
is absolutely necessary for battery buffered applications.
3A
60 mV
20 A
90 mV
5
l The load circuit is disconnected in the event of an overload or ^{5 A}
80 mV
25 A
120 mV
short circuit.
7.5 A
90 mV
l The load circuit is permanently monitored for wire breakage.
l 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.
l For switching and monitoring loads of 25 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
Switching point ¹⁾
typically 1.3 x I_N

Trip time¹⁾
(-40 °C...+85 °C: 1.1...1.5 x I_N)
typically 200 ms with switch-on onto

overload and/or load increase on duty
max. overload
I_N = 1 A ... 10 A: 60 A (at L/R = 3ms)

I_N = 15 A ... 25 A: 250 A (at L/R = 3ms)
Temperature disconnection power transistor > 150 °C
Parallel connection of channels for loads of 25 A plus, several units of

identical current ratings may be

connected in parallel. To ensure equal
(length and cross section).

distribution of current between units,
l Coloured label, for the identification the rated current (e. g. red = 10 A)
symmetrical design of the supply feed

is necessary (length and cross section).
Free-wheeling diode
for connected load

Delay time ¹⁾
integral
I_N = 1 A ... 10 A: 40 A
I_N = 15 A ... 25 A: 100 A
t_on 5 ms / t_off 1.5 ms
1) typical
1651
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