ABB C572 Application Information

Application examples

C572

Electronic

Safety relays

7

Application

The safety relay C 572 can be used in EMERGENCY STOP circuits as per
EN 418, in safety circuits as per VDE 0113 Part 1 (06.93) and/or EN 60 204-1
(12.97), e.g. with movable covers and safety gates.
Depending on the external connection, safety category 4 as per DIN EN 945-1 is
achievable with this device.

Functions and connections

The safety relay C 572 has three release circuits (safety outputs) which are
confi gured as NO contacts and two signal circuits confi gured as an NC contact.
Three LEDs indicate operating state and function.
When the EMERGENCY STOP pushbutton or limit pushbutton is unlocked and
the ON pushbutton is pressed, the redundant safety relays, electronic circuitry
and external contactors are tested for pro per functioning.
On the C 572, the ON circuit Y33, 34 is checked for short circuit. This means
that a fault ist detected when Y33,34 is closed before the EMERGENCY STOP
button is closed.

Terminal marking

Supply A1 L/+
voltage A2 N/-

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 output 1 (n/c)
51, 52 Signal output 2 (n/c)

Function Monitored Monitored start / Autostart
start Autostart

1-channel ON push button Jumper from Y11 to Y12 Feedback loop
at Y33, 34 Jumper from Y21 to Y22 or jumper to
EMERGENCY-STOP Y33, 34 and
circuits at Y10, 11 jumper from

2-channel Jumper from Y10 to Y11 Y43 auf Y44
EMERGENCY-STOP Important:
circuits at Y11, 12 and Y21, 22 must be
Y21, 22 closed before or
at the same time
as Y11, 12

Operation states

LEDs Operation

POWER Channel 1 Channel 2 PS E-STOP ON Safety outputs

ON non activated closed

activated

activated non open

activated

non non open

activated activated

Faults

Relay fusion-welded open

Motor cont.fusion-welded
Defects in electronic
Short circuit in ON circuit

Cross or ground faults in
EMERG. STOP circuit
(min. fault current
I
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
150 nF/km sensors and power supply lines)

Autostart and safety gate monitoring

Safety category 4 acc. to EN 954-1

2

max. 1000m (total cable length for

Kmin

= 0.5A;

7

Internal circuit

Monitored start for EMERGENCY STOP

Safety category 2 acc. to EN 954-1

Autostart for guard door monitoring; Safety category 2 acc. to EN 954-1

Monitored start for EMERGENCY STOP

Safety category 3 and 4 ac. to EN 954-1

Low Voltage Products & Systems 7.43

AC 1000 - 11/03