ABB C570, C571, C573 Application Information
Electronic
ON
EMERGENCY-STOP
M
13 23
14
24
K2
K1
K2
A2
K1
N/ñN/ñ
A1
24 VAC/DC
L/+
(34) (42)
(33) (41)Y1
K1
K2
C571/C573
Y2
H1
Application examples
Safety relays
C570, C571, C573
7
Information
The safety relays are tested by BIA. The shown external wiring diagrams / application examples are examples of use only. A risk appraisal has to be done by the user.
Further application examples on request.
C570
Application
The safety relay can be used to monitor EMERGENCY STOP circuits and for
monitoring of other protective devices (e.g. safety gates)
L+
L-
F1
EMERGENCYSTOP circuit
13NO33NO57
L+
X
3
X
X
1
L-
X
4
X
X
2
23NO43NO65
5
C570
14NO34NO58
24NO44NO66
6
NO
NC
NO
NC
C571, C573
Application
The safety relays C 571/C 573 can be used in EMERGENCY STOP circuits as per
EN 418 and in safety circuits as per VDE 0113 Part 1 (11.98) and/or EN 60 204-1
(11.98), e.g. with movable covers and guard doors. Depending on the external
connections, categories 3 and 4 (with ad di tio nal external measures) as per DIN
EN 954-1 are achievable.
Functions and connection
The safety relay C 573 has three release circuits (safety outputs) which are
confi gured as NO contacts and a signal circuit confi gured as a NC contact. The
safety relay C 571 has two release (safe) circuits which are confi gured as NO
contacts. The number of release circuits can be increased by adding one or more
C 579 extension units. Three LEDs indicate the operating state and function.
When the EMERGENCY STOP button or the limit switch is unlocked and when
the ON button is pressed, the internal circuits of the safety relays and the external
contactors are checked for proper functioning.
Connect the EMERGENCY STOP pushbutton or the limit switch in the supply
cable from A1 to +24 or L24 V. To evaluate over two channels, connect Channel 2
from A2 to 0 V or N. Connect the ON button in series with the NC contacts of the
external contactor (feedback loop) between terminals Y1 and Y2.
Terminal markings
Supply A1 L/+
voltage A2 N/Sensors Y1, Y2 ON button, feedback loop
Outputs 13, 14 Safety output 1 (n/o)
23, 24 Safety output 2 (n/o)
33, 34 Safety output 3 (n/o)*
41, 42 Signal circuit 1 (n/c)*
* with C 573 only
IInternal circuit
A1
Y1 Y2 13 23 33 41
1
2
3
1 PTC fuse
2 Power pack
3 Control logic
4
4 Channel 1
5 Channel 2
Emergency Stop, category 2 acc. to EN 954-1
24 VAC/DC
NOT-AUS
A1
K1
K2
K3
Y1 Y2
L/+
EIN
13 23
Operation
Operating states indication:
“READY“ indicates that the supply voltage is applied to the unit, provided that the
contacts of the EMERGENCY STOP pushbutton or door safety switch are closed.
“ON“ lights up, when the ON button is pressed and the enabling circuits are
switched through.
L+
L-
F1
A
B
Safety gate
NC
NC
monitoring
(A= door open,
B= door closed)
13NO33NO57
L+
X
3
X
X
1
L-
X
4
X
X
2
23NO43NO65
5
C570
14NO34NO58
24NO44NO66
6
NO
NO
Operating states
LEDs Operation
POWER Channel 1 Channel 2 PS EMERG. ON Safety
STOP output
ON non activated closed
activated
activated non open
activated
non non open
activated activated
Faults
Relay fusion-welded open
Motor contactor
fusion-welded
Defects in electronic
Cross or ground faults in
EMERG. STOP circuit
(min. fault currentI
PTC-fuse trips or supply
voltage missing
Fault clearance
1. Switch supply voltage off.
2. Clear fault or replace device.
3. Switch supply voltage back on.
Cable length
for 2 x 1.5mm
2
max. 1000m (total cable length for
150 nF/km sensors and power supply lines)
EMERGENCY STOP, category 3 and 4 acc. to EN 954-1
K1
(33) (41)
M
Kmin
= 0.5A;
7
(34) (42)
K3 H1
K2
M
K3
M
5
Low Voltage Products & Systems 7.41
A2
14 24 34 42
AC 1000 - 11/03
C571/C573
14
A2
24
K1
K2
N/ñN/ñ
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