ABB C574 Application Information
Electronic
M
M
A2
L/+
PE
N/ñ
PE
N/ñ
L/+
K1 K2
13 23A131 47
Y2257Y21Y12Y10
Y11
14 24Y33 32 48 58Y34
K2K1H1
ON
C574
K1
K2
open closed
open closed
7
Safety relays
Application examples
C574
Application
The safety relay C 574 can be used in EMERGENCY STOP devices as per
EN 418, in safety circuits as per VDE 0113 Part 1 (06.93) and/or EN 60 2041 (12.97), such as for monitoring safety gates, or in circuits with controlled
stand-still requirement (STOP Category 1).
Depending on the external circuitry, this device can be used to realize Safety
Category 4 instantaneous release circuits and Safety
Category 3 delayed release circuits according to DIN EN 954-1.
Functions and connections
The C 574 safety relay possesses two delayed and two instantaneous release circuits (safety outputs) as NO contacts and one instantaneous signal
output as NC contact. Five LEDs indicate the operating status and the functions.
The redundant safety relays, the electronics and the operated motor
contactors are tested for proper functioning when the EMERGENCY STOP
7
button or the limit switch button is unlatched, and when ON circuit Y33, Y34
is closed.
On the C 574 (monitored start), 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 voltage A1 L/+
A2 N/-
Output 13, 14 Safety output 1, instantaneous
23, 24 Safety output 2, instantaneous
31, 32 Signal output, instantaneous
47, 48 Safety output 1, delayed (t)
57, 58 Safety output 2, delayed (t)
Function Monitored Start
1-channel ON pushbutton Jumper from Y11 toY12
at Y33, 34 Jumper from Y21 to Y22
EMERGENCY STOP circuits at Y10, 11
2-channel Jumper from Y10 to Y11
EMERGENCY STOP circuits at
Y11, 12 and Y21, 22
Internal circuit
A1
A2
Monitored start for EMERGENCY STOP
Safety category 3 and 4 acc. to EN 954-1
Y10 Y11 13 23 4731
Y12 Y21Y22
2
EMERGENCY-
STOP
3
L/+
1
PE Y33 Y34
ON
K1
K2
4
5
6
7
C574
14 24 4832
PE
N/ñ
PE A 2
57
1 Power pack
2 PTC-fuse
3 Control logic
4 Channel 1
5 Channel 2
6 Channel 1 (+)
7 Channel 2 (+)
58
L/+
13 23A1 31 47Y22 57Y21Y12Y10Y11
K1
K2
14 24Y33 32 48 58Y34
M
K2K1H1
N/ñ
Operation
LEDs Operation
POWER Ch 1 Ch 2 Ch 1 Ch 2 PS E-STOP ON Safety outputs
ON non activated closed
activated
activated non open
delay activated
time
elapsed
non non open
activated activated
activated non FK 1 & 2 open,
delay activated FK1(t) & FK2(t)
time closed
elapsed
Faults
Relay fusion-welded open
Motor cont. fusion-welded
Defect in electronic
Short circuit in ON circuit
Cross or ground faults in
emergency trip circuit
(min. fault current
I
Fault clearance
1. Switch supply voltage off.
2. Clear fault or replace device.
3. Switch supply voltage back on.
Cable length
for 2 x 1.5 mm
2
max. 1000m total cable length for
150nF/km sensors and power supply lines)
Monitored start for EMERGENCY
Safety category 2 acc. to EN 954-1
ON
STOP
K1
K2
C574
L/+
EMERGENCY-
Safety gate monitoring
Safety category 3 and 4 acc.to EN 954-1
ON
closed
K1
K2
open
Safety gate monitoring
Safety category 2 acc.to EN 954-1
= 0.5A; PTC fuse trips)
Kmin
STOP
/+
L
PE A 2
PE
N/ñ
L/+
C574
13 23A1 33 41Y22 51Y21Y12Y10Y11
14 24Y33 34 48 58Y34
PE
N/ñ
K2
K1
M
M
K2K1H1
N/ñ
L/+
13 23A1 31 47Y22 57Y21Y12Y10 Y11
PE
14 24Y33 32 48 58Y34
A2
K1
K2
M
K1H1
K2
N/ñ
7.44 Low Voltage Products & Systems
AC 1000 - 11/03
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