Solid State Remote Power Controller E-1071-623/627
Description
The E-T-A Solid State Remote Power Controllers E-1071-623/627
are electronic control modules suitable for inductive loads such as
electromagnetic valves (solenoids), magnetic brakes etc.
They are used:
•
•
•
for safe and quick switching of loads
for monitoring the electrical condition of the loads
for compensating different cable lengths
The load connected to the relay should be operated with a higher voltage
(DC 28…60 V) than its rated voltage (DC 24 V) because the load current
is controlled electronically (pulse-controlled characteristics). This is
to ensure that in industrial plants with different cable lengths (supply
cables, load cables) an increased inrush current can be applied to
each load. During hold duty the load current is reduced to a smaller
value (approx. 60 % of the current rating), thus reducing the operating
temperature and extending the life of the loads.
E-1071-623
The double pole electronic switching output prevents inadvertent
start-up or dangerous machine movements as may arise upon a
ground fault in systems with ungrounded power supply (‘IT systems’)
(see EC Machinery Directive or EN 60204 part 1 “Safety of Machinery
- Electrical Equipment of Machines”, para 9.4.3.1).
Technical data (T
= 25 °C, U = DC 48 V)
B
ambient
Rated voltage
Operating voltage UB
DC 48 V
DC 28...60 V
(see Technical description)
adjustable between 0.1...3.1 A via switch
and potentiometer on the front side
Current rating IN
Typical applications
Current consumption I0
(US = »0«)
Residual ripple for
all voltages
Reverse polarity protection UB (terminals 1 and 2), integral
Fail Save
Insulation voltage
l
Double pole switching of inductive actuators such as electromagnetic
valves or magnetic clutches in machinery and equipment
Monitoring the electrical operability of loads
Protection and monitoring of load circuit cables
Status indication, failure indication in load circuit visually
(via LEDs or red tripped button) and via potentialfree status outputs
Double pole split up of the load circuit manually or electrically in
the event of overload or short circuit
typically 16 mA
l
max. 5 % (3 phase bridge)
l
fuse
l
2.5 KV between load circuit, control circuit
and status signal circuit
l
Load circuit
Load output
NPN transistor, minus switching,
pulse-controlled (approx. 180 Hz)
DC 24 V/adjustable between 0.1...3.1 A
up to 10 % more than pickup current
typically 60 % of the set rated current IN
approx. 4.5 A
Load rating
Features
Switch-on current IE
Holding current IH
Short circuit
l
Designed for inductive loads (DC 24 V)
Individual adjustment to various load currents
(standard: IN = 0.1...3.1 A)
Significant reduction of power loss in the load by pulse-controlled
disconnection current
Wire break monitoring
Physical isolation
l
in the ON and OFF condition (RED LED)
2-pole in the load circuit,
by manual circuit breaker release
or after short circuit disconnection
2 x ø 2 mm (current proportional voltage:
1 V = 1 A )
l
characteristics
l
Double pole switching output, short-circuit proof (short-circuit
limitation); physical disconnection from supply
Current measuring plugs
l
l
Free-wheeling circuitry
(see Technical description)
integral electronic control with quick
disconnection
Inrush current and holding current monitoring
Physical isolation:
- optocoupler in the control circuit
- physical disconnection of load circuit, manually or in the event
of a short circuit
- optocoupler for status outputs
Reverse polarity and overvoltage protection in the control, load
and status circuits
Control current indication by YELLOW LED
O.K. indication by GREEN LED
Wire break indication by RED LED (load circuit)
Fault indication by RED LED
(short circuit, over/undervoltage, setting error)
Two status outputs for PLCs for evaluation
(status indication, ON indication)
^
5
Control circuit
Control
Control voltage US
optocoupler in control input
»0« = DC 0…5 V
»1« = DC 8.5…35 V
Control current IS
typically 5...10 mA
l
Switching frequency fmax
Control signal (US = »1«)
Protection
1 Hz
YELLOW LED lights (Icontrol flowing)
reverse polarity protection (diode)
l
l
l
l
Status outputs
2 signal outputs
ON indication/function indication
- physically isolated by optocoupler
- transistor outputs, plus switching
- auxiliary voltage UA: DC 12...60 V
- max. 50 mA per output
l
l
- integral free-wheeling diode
- reverse polarity and overvoltage
protection
Quick disconnection (do not connect a free-wheeling diode to the
load as the free-wheeling current is controlled electronically)
Break time < make time
ON indication
(terminal 8)
US = »0« : output non-conductive
< 70 ms switch-off signal delay
US = »1« : output connecting plus potential
(term. 10) to term. 8 only as long
as load current flows, not with
wire break or short circuit
< 15 ms switch-off signal delay
fault: output non-conductive
no fault: output connecting plus potential
(terminal 10) to terminal 9
Function indication
(terminal 9)
1646
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