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PDF 3TK28xx Data sheet ( Hoja de datos )

Número de pieza 3TK28xx
Descripción Safety Integrated Application Manual
Fabricantes Siemens 
Logotipo Siemens Logotipo



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6.1 Switch Safely
The following circuit examples have
been harmonized with the German
Trade Association (BG) and have been
approved.
• Contactor circuits
• SIGUARD safety combinations
using contactors
using safety relays
Suitable for:
• EMERGENCY OFF
• Protective door monitoring
functions
• Press controls
EMERGENCY OFF circuits for ex-
tremely simple machines
EMERGENCY OFF switch
The EMERGENCY OFF function may
only be fed through an EMERGENCY
OFF switch for extremely simple
machines, depending on the result of
a risk analysis. In this particular case,
only Stop Category 0 is possible.
Such an EMERGENCY OFF switch
switches, contrary to usual EMER-
GENCY OFF pushbuttons, the main
circuit (circuit diagram 6/1).
An EMERGENCY OFF switch must
be configured, so that
• There is only one EMERGENCY
OFF switch;
• the EMERGENCY OFF switch is
located in the supply to those
circuits which can result in hazard-
ous motion in the system. The com-
plete power supply to all of the cir-
cuits does not have to be interrup-
ted;
• the EMERGENCY OFF switch must
be able to interrupt the current of
the largest motor when the motor
stalls;
• the sum of the currents of all of the
loads which must be disconnected
using the EMERGENCY OFF switch
must be able to be safely interrup-
ted.
An EMERGENCY OFF switch may
• be manually actuated;
• act on an undervoltage release via
one or several EMERGENCY OFF
control devices (circuit diagram 6/1);
• be provided with overload- and/
or short-circuit releases (version
as circuit-breaker);
• be simultaneously used as main
switch, if it additionally fulfills the
requirements for a main switch
(however, a main switch must
disconnect all circuits).
An example for such an EMERGENCY
OFF switch for extremely simple
machines is illustrated in circuit dia-
gram 6/2.
Manual
drive
mechanism
To loads, which must
be shutdown for an
EMERGENCY OFF
“EMERGENCY OFF switch”
To loads, which don’t have to
be/may not be disconnected
for EMERGENCY OFF
Main switch
Supply
Switch lock
Release
Mushroom-head
pushbutton
EMERGENCY
OFF
control device
U<
Circuit diagram 6/1
EMERGENCY OFF switch with manual actuation or remote actuation via
undervoltage release
“EMERGENCY OFF switch”
To loads which
don’t have to
be/may not be
disconnected for
EMERGENCY OFF
Off
On
K1
Control
off
on K2
Main
switch
Supply
K1
e.g. plant protective conductor
K2
To loads which must be shutdown
for EMERGENCY OFF
Circuit diagram 6/2
Example of a machine control with EMERGENCY OFF switch
(this is only permissible with some restrictions)
6/2 Safety Integrated Application Manual Siemens AG

1 page




3TK28xx pdf
Immediately ready after the power
returns (it is not necessary to open
and close the protective device):
The “Ready ON” f is not required
(jumper X5-X6), if the resulting auto-
matic reclosure (restart) does not
represent potential danger.
L1/L+
N/L-
F1
L1/L+
Door
Open
Closed
X1
3
4
(X2) (X3) (X4) X5
(X6)
1
13
2
1 Enable
2 Signal
3 Signal transmitter
4 “Ready ON”
K1
K2
K3
N/L-
X2 X4
X6 14
Circuit diagram 6/10
Contactor safety combinations 3TK28 01 to 3TK28 04 to monitor moving protective
devices. For 3TK 2801/02, terminals “X2, X4, X6” are at the top, for TK 2803, there
is no terminal “X3”.
L1/L+
N/L-
3
F1
L1/L+
4
X1 (X2) (X3) (X4) X5
(X6)
1
13
2
1 Enable
2 Signal
3 Signal transmitter
EMERGENCY
OFF
4 “Ready ON”
K1
K2
K3
N/L-
X2 X4
X6 14
Circuit diagram 6/11
Contactor safety combinations 3TK28 01 to 3TK28 04 for an EMERGENCY OFF circuit.
For 3TK28 01/02, terminals “X2, X4, X6” are at the top, for 3TK 2803, there is no
terminal “X3”.
6/6 Safety Integrated Application Manual Siemens AG

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3TK28xx arduino
Interface for expansion units
The 3TK29 SIGUARD combination
expansion units must always be used
together with a basic 3TK28 unit. One
expansion unit can be connected for
each enabling contact in the basic
unit. The signaling contact in the ex-
pansion unit must always be connec-
ted in series with “Ready ON”.
The Category which a circuit with an
expansion unit can achieve according
to EN 954-1 depends on the Cate-
gory of the basic unit with interface.
If the expansion unit is located next
to the basic unit in the cabinet, the
connecting cables between the basic
unit and expansion unit are so short,
that a fault (electrical fault) can be
completely ruled-out in these
connecting cables.
A circuit with the 3TK28 06 and two
expansion units to multiply the
contacts of the 3TK28 07 is illustra-
ted in circuit diagram 6/21.
The 3TK29 . 3 expansion units can
be used for drop-out delayed contacts
of up to 8 seconds (circuit diagram
6/23). The delay time is set using dif-
ferent jumpers at connecting termi-
nals Y2, Z1, Z2 and Z3.
L1/L+
N/L-
F1
Ready
ON
L1/L+
V1
X1
EMER-
GENCY-
STOP
X3 X5
3TK28 06 (or 3TK28 05) with two-channel
and cross-circuit-proof connection of the
EMERGENCY OFF control devices can
achieve Category 4 according to EN 954-1,
also using one (or two) expansion unit(s).
13 23 33 43 53 65
103 123
X7 73 83 93 113 133
If required, more than one
expansion unit can be connected
to a basic unit as shown here in
the example. In this example, 5
expansion units can be connected.
103 123
X7 73 83 93 113 133
H1
R1 R5
U
R3 K3 D3
K2
K3
H3
K1
K3
K2 K2
H2 K1
D1 K1
D2 K2 R2
K1 K3
R1 K3
R3
U
R2 K4
K3 K4 H1
R1 K3
R3
U
R2 K4
K3 K4 H1
K1
N/L- X2 X4 X6
14 24 34 44 54 66 A1/ A2/
L+ L-
X8 74 84 94 114 134 A1/ A2/
104 124 L+ L-
X8 74 84 94 114 134
104 124
Circuit diagram 6/21
Contactor safety combinations 3TK28 06 for two-channel and cross-circuit-proof
connection of the EMERGENCY OFF control device and two 3TK29 07 expansion units.
This circuit can also be realized using the 3TK28 05 unit.
6/12 Safety Integrated Application Manual Siemens AG

11 Page







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