Siemens 3TK2805 Manual De Instrucciones página 2

Contactor Safety Combination
Instructions
WARNING:
HAZARDOUS VOLTAGE
CAN CAUSE ELECTRICAL SHOCK
AND BURNS.
DISCONNECT POWER BEFORE PROCEEDING
WITH ANY WORK ON THIS EQUIPMENT.
Operation permissible in switchgear cabinet with degree of protection
IP 54 only!
Application
The contactor safety combinations can be used in EMERGENCY-OFF circuits and for
monitoring protective devices (e.g. protective screens).
Functions and connections
In the case of equipment whose supply volt. is the same as the control voltage, the
instructions given in DIN EN 60204-1, VDE 0113 Part 1: (1998-11), Point 9.1.1, must be
followed!
The internal control circuit of the contactor safety combination is designed according
to DIN EN 60204-1, VDE 0113 Part 1: (1998-11), para. 9.4.2.2, so that in the case of a
fault in one of the contactor relays the function of the safety circuit is maintained. The
supply voltage must meet the requirements of the DIN EN 60204-1, VDE 0113 Part 1:
(1998-11) (the terminals "A2" must be connected to that side of the control current
circuit which is linked to the protective conductor system).The contacts of the contac-
tor relays are checked for proper opening and closing in every ON and OFF cycle of the
machine to be switched. This is, for instance, done by
- connecting and disconnecting the control volt. with the main switch,
- activating and deactivating the EMERGENCY-OFF unit
- opening and closing of the protective screen.
For circuit diagrams and connection examples 3TK2805, see Fig. III:
a Internal circuit diagram (DC version)
b EMERGENCY OFF circuit (2-channel redundancy with earth-fault and short-circuit
detection)
c Protective door circuit (2-channel redundancy with earth-fault and short-circuit
detection))
d EMERGENCY OFF circuit with a 3TK29.. supplementary module
(2-channel redundancy with earth-fault and short-circuit detection)
e Protective door circuit with a 3TK29.. supplementary module
(2-channel redundancy with earth-fault and short-circuit detection)
The German statutory industrial accident insurance institution (BG) has tested the
external protective circuits (Fig. IIIb, IIIc, IIId, IIIe), which which make possible the
proper functioning of the contactor safety combination. The BG has confirmed that
Safety Category 4 according to DIN EN 954-1: (1997) can be implemented with the aid
of the 3TK2805 contactor safety combination, provided that the external protective
circuitry is correct.
These connection examples also apply to 3TK2806 applications.
For circuit diagrams and connection examples 3TK2806, see Fig. IV:
a Internal circuit diagram (DC version)
b Protective door circuit with one protective door (2-channel redundancy with
earth-fault and short-circuit detection and automatic starting)
c Protective door circuit with one protective door (2-channel redundancy with
earth-fault detection and automatic starting).
According to DIN EN 60204-1, VDE 0113 Part 1: (1998-11), automatic starting is
allowed wherever no hazard can arise as a result.
Note: Single-channel control of the contactor safety combination is possible by con-
necting X6 directly with "A2" and by connecting the EMERGENCY OFF between X1
and X3; X5. A link must be inserted between X3; X5.
The external control circuit connections are shown for example only; the actual con-
nections must be defined by the user on the basis of a risk assessment.
Further applications available upon request.
Installation
For dimension drawings see Fig. I (dimensions in mm).
Minimum clearances from earthed parts on the sides: 3 mm (see Fig. IIa).Connection
see Fig. IIb.
Cover the contactor safety combination during installation if foreign partic-
les, such as swarf, can fall onto it. Install contactor safety combination in a
housing if it is exposed to dirt, dust or aggressive atmospheres.
Cleaning: Remove dust with a vacuum cleaner.
Permissible operating position: any.
2
DIN EN 60439 Part 1/ VDE 0660 Part 500 (04.94)
Order No.: 3ZX1012-0TK28-5AA1
Operation
"LINE" indicates that voltage is applied to the unit.
"CHANNEL 1" and "CHANNEL 2" light up when the ON button is pressed and the con-
tacts of the EMERGENCY OFF pushbutton or door safety switch are closed.
Technical data
Permissible ambient temperature T
- Operation
- Storage
Degree of protection
IInsulation coordination to DIN VDE 0110-1: (April 1997)
Clearances in air and creepage paths: 4 kV/ 3
(Control circuit: 1.5 kV/ 3)
Rated insulations voltage
(for control circuit
Rated impulse withstand voltage
(for control circuit
Utilization category Rated
as per
operational
DIN VDE 0660 Part 100:
voltage
(1999-12), IEC 60947-1: (1999)
U
e
AC-1/ AC-12
AC-15 230 V
400 V
DC-13 24 V
220 V
AC-3 230 V
400 V
Values as per DIN VDE 0435 Part 120: (March 1997)
Continuous current I
th
Making capacity at:
p.f. = 0.7 to 1 AC 230 V
resistive DC 24 V
Short-circuit protection for signal circuit and enable circuit:
No-weld fuse protection
at short-circuit current
- Fuse-links Low-voltage HRC, NEOZED or DIAZED
gL (gG)
quick response
Fusing of contactor safety combination:
- M.C.B., type G time-lag/quick resp.
- M.C.B, type A, B, C
- Protective circuit-breaker terminals
type 8WA1011
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 NSK.
3TK2805
3TK2806
English
:
U
-25 to +55 °C
-55 to +80 °C
IP 20
U = 400 V
i
U = 250 V)
i
U = 4 kV
imp
U = 1.5 kV)
imp
Rated operational current
I 40 °C (I
e
6 A 6 A
4 A (4 A)
3 A (3 A)
6 A (6 A)
0.5 A (0.5 A)
Rated power
0.55 kW 0.55 kW
1.1 kW 1.1 kW
10 A (8 A)
10 A (8 A)
10 A (8 A)
Σ max. 30 A
(Σ max. 24 A)
≥1 kA
I
K
6 A
10 A
6 A
6 A
6 A
55 °C)
e