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Safety Relay; Important Notice - Siemens SIRIUS 3TK2821 Operating Instructions Manual

Safety relay
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SIRIUS

Safety Relay

Operating Instructions
Read and understand these instructions before installing, operating, or maintai-
ning the equipment.
!
DANGER
Hazardous voltage.
Will cause death or serious injury.
Disconnect power before working on
equipment
The safety relay must be installed in switchgear cubicles complying with
degree of protection IP32, IP43 or IP54, depending on the prevailing environ-
mental conditions.

IMPORTANT NOTICE

The products described herein are designed to be components of a customized
machinery safety-oriented control system. A complete safety-oriented system
may include safety sensors, evaluators, actuators and signaling components. It
is the responsibility of each company to conduct its own evalution of the effecti-
veness of the safety system by trained individuals. SIEMENS AG, its subsidia-
ries and affiliates (collectively "SIEMENS") are not in a position to evaluate all
of the characteristics of a given system or product or machine not designed by
SIEMENS.
SIEMENS accepts no liability for any recommendation that may be implied or
stated herein. The warranty contained in the contract of sale by SIEMENS is the
sole warranty of SIEMENS. Any statements contained herein do not create new
warranties or modify existing ones.
Application
You can use the safety relays 3TK2821/24 in EMERGENCY STOP devices 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.
Safety category 3 according to DIN EN 954-1 can be achieved by using this
device. Depending on the estimated risk, it may be necessary to carry out addi-
tional measures in the sensor circuit (e.g. shielded cable laying).
Functions and connections
Safety relay 3TK2821 has three release circuits (safety circuits) which are confi-
gured as NO circuits and a signal circuit configured as an NC circuit.
Safety relay 3TK2824 has two release (safe) circuits which are configured as NO
circuits. The number of release circuits can be increased by adding one or more
3TK2830 extension modules. 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 relay and the exter-
nal 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 circuit) to terminals Y1 and Y2 (for circuit
examples, see Figs. IV to VII).
Terminal
Operating
A1
voltage
A2
assignments
Sensors
Y1, Y2
Outputs
13, 14
23, 24
33, 34
41, 42
2
Cable lengths
for 2 x 1.5 mm
Figures
Fig. I:
Dimension drawings (dimensions in mm)
Fig. II: Installation / Cage Clamp
Fig. III: Internal circuit: ¿ PTC fuse, À power pack,
Á control logic, Â Channel 1, Ã Channel 2
Fig. IV: EMERGENCY STOP, category 2 per EN 954-1**
Fig. V: EMERGENCY STOP, category 3 per EN 954-1
Fig. VI: Guard door monitoring, category 2 per EN 954-1**
Fig. VII: Guard door monitoring, category 3 per EN 954-1
**) This wiring example only satisfies category 2 according to EN 954-1 if a
warning is automatically generated when the actuator fails or the machine
control initiates a safe state. Otherwise an alternative shut-down method
is required.
2
L/+
N/
ON button, feedback circuit
Release circuit 1 (NO)
Release circuit 2 (NO)
Release circuit 3 (NO)*
Signal circuit (NC)*
*) with 3TK2821 only
max. 1000 m (total cable length for
sensors and power supply lines)
Order No.: 3ZX1012-0TK28-1CA1
Operating states
LEDs
Operation
POWER Channel 1 Channel 2 PS
ON
Faults
• Relay fusion-welded
• Motor contactor fusion-welded
• Defect in electronics
Cross or ground faults in
EMERGENCY STOP circuit (min.
fault current I
trips) or supply voltage missing
Technical data
Permissible ambient temperature T
u
Operation/storage
Degree of protection to EN 60 529
Rated insulation voltage U
i
Rated impulse withstand voltage U
imp
Rated control supply voltage U
s
Rated power
DC operating range
AC operating range
Shock resistance (half-sine) as per IEC 60068
Weight
Recovery time
Release time
Response time
Utilization
Rated operational
category
voltage U
e
(V)
as per DIN VDE 0660
Part 200, IEC 60947-5-1
AC-15
230
DC-13
24
115
230
Continuous current I
th
Short-circuit protection
Fuse links
for release circuit
Duty class
and signal circuit
Duty class
Be sure to fit the specified fuses. Otherwise safe interruption in
the event of a fault cannot be guaranteed.
For further data and accessories see Catalog.
Reliable functioning of the equipment is only ensured with certified
components.
3TK2821, 3TK2824
DIN EN 60 947-5-1 (08.00)
English
EMERGENCY
ON
Release
STOP
circuits
not activated activated
closed
activated
not activated open
not activated not activated open
open
= 0.5 A; PTC fuse
Kmin
25 to +60 °C/
40 to +80 °C
IP40, IP20 at terminals
300 V
4 kV
24 V AC/DC
1.5 W
0.85 to 1.2 x U
s
0.85 to 1.1 x U
s
8 g/10 ms
0.240 kg
minimum 200 ms
max. 150 ms
max. 150 ms
Rated operational current I
e
with all release circuits loaded
(A)
50 °C
60 °C
70 °C
5
4.5
4
5
4.5
4
0.2
0.2
0.2
0.1
0.1
0.1
5
4.5
4
DIAZED
gL(gG) 6 A / quick response 10 A
gL(gG) 6 A / quick response 6 A

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