Hazardous Voltage; Important Notice - Siemens 3TK2853 Quick Start Manual

Safety combination
Instructions
!
WARNING

HAZARDOUS VOLTAGE.

Can cause electrical shock
and burns.
Disconnect power before proceeding
with any work on this equipment.
The devices must be installed in a switchgear cabinet with the IP32, IP43
or IP54 degree of protection, depending on the ambient 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 effectiveness
of the safety system by trained individuals. Siemens AG, its subsidiaries and affil-
iates (collectively "Siemens") are not in a position to evaluate all of the character-
istics of a given machine 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 war-
ranty of Siemens. Any statements contained herein do not create new warranties
or modify existing ones.
Application
The 3TK2853 safety combination can be used in EMERGENCY STOP devices
according to EN 418 and in safety circuits according to EN 60204-1 (11.98), e.g.
movable guards, protective doors and non-contact protective devices. Depending
on the external circuit elements, safety category 4 according to DIN EN 954-1 or
SIL3 according to IEC 61508 can be achieved.
Functional description and instructions for connection
The 3TK2853 solid-state safety combination has two contactor relays as switching
elements, a safe solid-state output, a safe input for cascading and an input for
operational switching. Three LEDs indicate the operating state and the function.
When the device is put into operation it runs through a self-test to test the
correct functioning of the internal electronics.
All internal circuit components are monitored for faults cyclically during
operation.
Expansion units such as 3TK2830/56/57 or 3RA711/2/3/4 or external actuators or
loads can be switched via safe output 2. Cascading with the 3TK2841/42/45/53 or
3RA711 devices is also possible via safe output 2. One-channel cascading is only
allowed inside a switch cabinet for Cat. 3/4.
It must be ensured that the actuator/load and the 3TK2853 safety combination
have the same frame potential.
Details of the external connections of the safety combination should be taken from
the application examples in Fig. IV to Fig. X.
Use a power pack to IEC 60536 safety class III (SELV or
PELV) for power supply!
Terminal Operating A1
assignments voltage A2
Sensors Y11, Y12
Y21, Y22
Y35
Y32
Y33, Y34
Enable circuits
Inputs 1
3
4
Output 2
2
Cable lengths for 2 x 1.5 mm
Line capacitance
Figures
Fig. I/II/IIa: Dimension drawing (dimensions in mm) / Installation / Connection
Fig. III: Internal circuit: ¿ power pack, À sensor evaluation, Á driver for contactor
relays, Â power section, Ã cascading input, Ä terminals for operational
switching, Å safe solid-state output
Fig. IV: Protective-door monitoring, two-channel, autostart Cat. 4 / SIL3
Fig. V: Protective-door monitoring, single-channel, autostart Cat. 2 / SIL1
2
L+
M
Channel 1 EMERGENCY STOP or
position switch
Channel 2 EMERGENCY STOP or
position switch
With / without cross-circuit detection
Autostart changeover switch
ON button, feedback circuit
see Fig. XI
Cascading input
Supply for external switches
Input for operational switching
Safe solid-state output 24V DC / 1A
max. 2000 m (total cable length for sensors)
Max. 4.7 µF to M (sensors)
Order No.: 3ZX1012-0TK28-1GA1
Fig. VI: EMERGENCY STOP, two-channel, with additional ON button Cat. 4 / SIL3
Fig. VII: EMERGENCY STOP, single-channel, with additional ON button Cat. 2 / SIL1
Fig. VIII: Light barrier/array, two-channel, autostart, Cat. 4 / SIL3
Fig. IX: EMERGENCY STOP and protective door, two-channel, in cascade for Cat. 4 /
SIL3 enable circuits 3TK2853
Fig. X: a: without operational activation
b: with floating contact operationally activated
c: with non-floating output operationally activated
Fig. XI: Enable circuits
Operating states
LEDs Operation
POWER RUN FAULT EMERGENCY
STOP
not actuated actuated
actuated
not actuated not actuated off
self-test on start-up approx. 7s
Faults
• Defect in electronics
flashes • Change in terminal
assignment during
operation
• Short-circuit to L+
• Contactor welded
No supply voltage
Technical data
Permissible ambient temperature T
u
Operation/storage
Degree of protection to EN 60 529
Rated insulation voltage
Rated impulse withstand voltage
Rated control supply voltage
Rated power
Operating range
Shock resistance
Weight
Recovery time after EMERGENCY STOP
Recovery time after power failure
Release time after EMERGENCY STOP
Response time enable circuit
Response time output 2
Short-circuit protection enable circuit
Short-circuit protection A1
1)
Dark time
Start signal Y34
Process response time
Manual testing (intermittent operation)
Utilization category Rated operational
to IEC 60947-5-1 (02.00) voltage U
DC 13 24 V
1)
Safe outputs disconnected for test purposes; sufficiently slow actuators are not affected.
For further data and order numbers of accessories see Catalog.
Reliable functioning of the equipment is only ensured with certified components.
3TK2853
IEC 60 439 1, (08.00)
English
ON button Outputs Cause
on normal operation
once
no off EMERGENCY
function STOP
(protective door)
actuated
outputs
de-energized;
press ON button
to start
off
off
–25 to +60 °C/–40 to +80 °C
IP20
690 V
6 kV
24 V DC
8,5 W
0,9 to 1,15 x U
s
5g/11 ms
750 g
typically 400 ms
7 s
≤45 ms
max. 60 ms
max. 40 ms
10 A (utilization category gL/gK)
no short-circuit protection necessary
<1 ms
Pulse (min. 200 ms / max. 5 s)
180 ms
6 months
Rated operational current per
output at 60 °C
e
10 A (auxiliary switch blocks 6 A)