Siemens 3TK2842-1 Serie Instrucciones De Servicio página 2

Safety combination
Instructions
WARNING:
HAZARDOUS VOLTAGE
CAN CAUSE ELECTRICAL SHOCK
AND BURNS.
DISCONNECT POWER BEFORE PROCEEDING
WITH ANY WORK ON THIS EQUIPMENT.
The switchgear must be installed in switchgear cubicles complying
with degree of protection IP 32, IP 43 or IP 54, depending on the
prevailing environmental 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 subsidiaries
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
The 3TK2842 safety combination can be used in EMERGENCY STOP devices
according to EN 418 and in safety circuits according to EN 60 204-1 (11.98), e.g.
in movable guards and protective doors or in non-contact protective devices in
accordance with IEC 61496-1 (06.98), electrical equipment for furnaces in accor-
dance with DIN VDE 0116 (10.98) and automatic firing systems for gas burners in
accordance with DIN EN 298 (02.94). Depending on the external circuit ele-
ments, safety category 4 according to DIN EN 954-1 or SIL 3 according to
IEC 61508 can be achieved.
Functional description and instructions for connection
The 3TK2842 solid-state safety combination has one safe solid-state output and
one time-delayed safe solid-state output.
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 cor-
rect functioning of the internal electronics. All internal circuit components are
monitored for faults cyclically during operation.
Connect the EMERGENCY STOP button and/or the position switches or light
arrays to terminals Y11, Y12 and Y21, Y22. Connect the ON button in series with
the NC contacts of the external actuators to the supply voltage L+ (24 V DC) and
to terminal Y34. Connect cascading input 1 either via a safe output or directly to
the supply voltage L+ (24 V DC).
External actuators or loads can be switched via safe outputs 14, 24. It must be
ensured that the actuators or loads and the 3TK2842 electronic safety combina-
tion have the same frame potential. Paralleling outputs 14 and 24 to increase
the load current is not permissible.
If electronic sensors (light-array monitoring, etc.) are used, and in single-channel
operation, Y35 must be connected to L+ (24 V DC). For autostart operation, Y32
must be connected directly to L+ (24 V DC) and Y34 must be connected to it via
NC contacts of the external actuators.
Use a power pack to IEC 60536 safety class III (SELV or PELV)
for power supply!
Terminal Operating A1
assignments voltage A2
Sensors Y11, 12
Y21, 22
Y35
Y32
Y34
Input 1
Outputs 14
28
2
Cable lengths for 2 x 1.5 mm
2
L+
M
Channel 1 EMERGENCY STOP or
position switch
Channel 2 EMERGENCY STOP or
position switch
With / without cross-circuit detection
Autostart
ON button, feedback circuit
Cascading input
Safe solid-state output
Safe solid-state output, time-delayed
max. 2000 m (total cable length for sensors)
Order No.: 3ZX1012-0TK28-1DA1
Figures
Fig. I: Dimension drawings (dimensions in mm)
Fig. Ia: Terminal designation
Fig. II: Installation / Cage Clamp
Fig. IIa: Connection
Fig. III: Internal circuit: ¿ power pack, À sensors, Á Output 1, Â Output 2
Fig. IV: Protective-door monitoring, two-channel, autostart; cat. 4 to EN 954-1
with voltage-operated e.l.c.b. and delayed disconnection, stop; cat. 1
Fig. V: EMERGENCY STOP, single-channel, monitored start with additional ON
button; category 2 to EN 954-1 with voltage-operated e.l.c.b. and delayed
disconnection, stop; category 1
Fig. VI: EMERGENCY STOP, two-channel, monitored start with additional ON
button; category 2 to EN 954-1 with voltage-operated e.l.c.b. and delayed
disconnection, stop; category 1
Fig. VII: EMERGENCY STOP and protective-door monitoring, two channel with
tumbler, monitored start; category 4 to EN 954-1
Fig. VIII: EMERGENCY STOP, two-channel, monitored start with additional ON button
and protective-door monitoring, two-channel, autostart; category 4 to EN 954-
Fig. IX: 1
Fig. X: Light-array monitoring, two-channel, autostart; category 4 to EN 954-1
Safety mat, two-channel, autostart; category 3 to EN 954-1
Operating states
LEDs Operation
POWER RUN FAULT PS
ON
flashes
on startup self-test approx. 7 sec.
flashes
Faults
• Defect in electronics
flashes
• Change in terminal assignment
• Short-circuit to 24V
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 (half-sine) as per IEC 600688 g/10 ms
Weight
Recovery time after EMERGENCY STOP
Recovery time after power failure
Release time after EMERGENCY STOP
Pickup time
Short-circuit protection
3)
Dark time
Start signal Y34
Utilization category Rated operational
voltage
as per IEC 60947-5-1
DC-13 24 V
1)
Sensor circuits open; Cross-circuit between the sensors; Short-circuit of sensors to frame
2)
only when using circuit variant with "cross-circuit detection"
3)
Safe outputs disconnected for test purposes; sufficiently slow actuators are not
affected.
For further data and accessories see Catalog NS K.
3TK2842
IEC 60 439-1 (1999)
English
EMERGENCY ON button
STOP
not activated activated
1) not activated off
activated
not activated not activated off
activated not activated off/on
during operation
2)
-25 to +60 °C/-40 to +80 °C
IP 40, IP 20 at terminals
50 V
500 V
24 V DC
1.3 W
0.9 to 1.15 x U
s
150 g
min. 200 ms
7 s
30ms/0.05 to 3s or 0.5 to 30s or 5 to 300s
max. 40 ms
no fusing necessary!
< 1 ms
pulse (min.200 ms / max. 5 s)
Rated operational current
per output
2.0 A
Outputs
on
off