www.e-t-a.de

Smart Power Relay E-1048-8C...

1

1651

5

Description

Features

E-1048-8C CUBIC version

Power supply LINE +

Type

battery and generator etc.

DC 12 V/DC 24 V

DC 9...32 V

Closed-circuit current

< 1 mA

Load circuit LOAD

Load output

Power MOSFET, high side switching

HSS

1 A ... 25 A (fixed rating)

without load reduction up to 85° C

(1 A...20 A), 25 A bis 60 °C ambient

temperature

Types of loads

resistive, inductive, capacitive, lamp

loads, motors (depending on duration

of inrush current)

typically 200 ms with switch-on onto

overload and/or load increase on duty

max. overload

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

distribution of current between units,

symmetrical design of the supply feed

is necessary (length and cross section).

Free-wheeling diode

integral

for connected load

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

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)

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.

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)

- 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

l

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.

l

The extremely low induced current consumption of less than 1 mA

is absolutely necessary for battery buffered applications.

l

The load circuit is disconnected in the event of an overload or

short circuit.

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

(length and cross section).

l

Coloured label, for the identification the rated current (e. g. red = 10 A)

1 A

50 mV

10 A

110 mV

2 A

55 mV

15 A

70 mV

3 A

60 mV

20 A

90 mV

5 A

80 mV

25 A

120 mV

7.5 A

90 mV

1) typical