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E-1048-8D 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-1048-8D...
Description
The Smart Power Relay E-1048-8D is a remotely controllable electronic
load disconnecting relay with two functions in a single unit:
l electronic relay
l 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.
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
E-1048-8D DICE version
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.
Technical Data (TA= 25 °C at UN)
Power supply LINE +
Applications
Type
DC power supply with small Ri
battery and generator etc.
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 and protected:
- 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
Voltage ratings UN
Operating voltage US
Closed-circuit current
I0 in the OFF condition 1)
DC 12 V/DC 24 V
DC 9...32 V
50 µA
Load circuit LOAD
Load output
Power MOSFET, High Side Switch
(HSS)
Current rating range IN 1 A ... 30 A (fixed ratings) without load
reduction up to 85° C (1 A ... 25 A),
30 A up to 60 °C ambient temp.
Types of loads
resistive, inductive, capacitive, lamp
loads, motors (depending on duration
Features
ENTRY version
of inrush current)
Load output with short circuit protection
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
closed-circuit current or switching current is needed. This is
important for battery buffered load circuits which have to remain
ENTRYprotect version 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
Typical voltage drop UON at rated current IN 1)
controlled even with the generator off line.
l The extremely low induced current consumption of less than 50 µA is
absolutely necessary for battery buffered applications.
IN
1A
UON
50 mV
IN
10 A
UON
110 mV
5
l The load circuit is disconnected in the event of a short circuit 2 A
55 mV
15 A
70 mV
(ENTRY version) or overload/short circuit (ENTRYprotect version). 3 A
60 mV
20 A
90 mV
l For switching and monitoring loads of 30 A plus it is possible to 5 A
80 mV
25 A
120 mV
connect several units in parallel. Uniform power distribution between 7.5 A
90 mV
30 A
140 mV
units must be ensured by symmetrical design of the supply cables
(length and cross section).
l Coloured label, for the identification the rated current (e. g. red = 10 A).
only ENTRYprotect
Switching point 1) typically 1.3 x IN
(-40 °C...+85 °C: 1.1...1.5 x IN)
Trip time (standard curve) 1) typically 200 ms with switch-on onto
Approvals
overload and/or load increase on duty
Authority
Approval mark
Regulation
Max. overload
IN = 1 A...10 A: 60 A (at L/R = 3 ms)
IN = 15 A...30 A: 200 A (at L/R = 3 ms)
Parallel connection of channels for loads of 30 A plus, several units of
KBA
E1
ECE R 10
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).
1) typically
1646
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