E-T-A E-1071-623, Руководство пользователя, Страница: 7 / 12

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Solid State Remote Power Controller E-1071-
623/627
6 - 49
6
Issue C
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.
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).
Description
E-1071-623
●
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
Typical applications
Features
●
Designed for inductive loads (DC 24 V)
●
Individual adjustment to various load currents
(standard: I
N
= 0.1...3.1 A and/or 10 mA…310 mA)
●
Significant reduction of power loss in the load by pulse-controlled
characteristics
●
Double pole switching output, short-circuit proof (short-circuit
limitation); physical disconnection from supply
●
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)
●
Quick disconnection (do not connect a free-wheeling diode to the
load as the free-wheeling current is controlled electronically)
Break time < make time
Technical data (T
ambient
= 25 °C, U
B
= DC 48 V)
Rated voltage DC 48 V
Operating voltage U
B
DC 28...60 V
(see Technical description)
Current rating I
N
adjustable between 0.1...3.1 A and/or
10…310 mA via switch and potentiometer
on the front side
Current consumption I
0
(U
S
= »0«) typically 16 mA
Residual ripple for
all voltages
max. 5 % (3 phase bridge)
Reverse polarity protection U
B
(terminals 1 and 2), integral
Fail Save fuse
Insulation voltage 2.5 KV between load circuit, control circuit
and status signal circuit
Load circuit
Load output NPN transistor, minus switching,
pulse-controlled (approx. 180 Hz)
Load rating DC 24 V/adjustable between 0.1...3.1 A or
DC 24 V/adjustable between10...310 mA
Switch-on current I
E
up to 10 % more than pickup current
Holding current I
H
typically 60 % of the set rated current I
N
Short circuit approx. 4.5 A
disconnection current
Wire break monitoring
in the ON and OFF condition (RED LED)
Physical isolation 2-pole in the load circuit,
by manual circuit breaker release
or after short circuit disconnection
Current measuring plugs 2 x ø 2 mm (current proportional voltage:
1 V = 1 A )
Free-wheeling circuitry integral electronic control with quick
(see Technical description)
disconnection
Control circuit
Control optocoupler in control input
Control voltage U
S
»0« = DC 0…5 V
»1« = DC 8.5…35 V
Control current I
S
typically 5...10 mA
Switching frequency f
max
1 Hz
Control signal (U
S
= »1«) YELLOW LED lights (I
control
flowing)
Protection reverse polarity protection (diode)
Status outputs
2 signal outputs ON indication/function indication
- physically isolated by optocoupler
- transistor outputs, plus switching
- auxiliary voltage U
A
: DC 12...60 V
- max. 50 mA per output
- integral free-wheeling diode
- reverse polarity and overvoltage
protection
ON indication U
S
= »0« : output non-conductive
(terminal 8)
< 70 ms switch-off signal delay
U
S
= »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
Function indication fault: output non-conductive
(terminal 9)
no fault: output connecting plus potential
(terminal 10) to terminal 9
^
W
E
N