| Вид документа | Технічний паспорт |
|---|---|
| Виробник | SIEMENS |
| Моделі | 3TK28 50, 3TK28 51, 3TK28 52, 3TK28 53, 3TK28 56, 3TK28 57 |
| Група обладнання | automation |
| Мова документа | англійська |
| Розмір файлу | 0.2 МБ |
Про документ
Solid-state safety relays combined with contactor relays in a single fully wired and tested unit for snapping onto a standard mounting rail. They are used in EMERGENCY-STOP circuits and safety circuits per EN 60204-1 (11.98), e.g. for moving covers and protective doors. Depending on device type and external circuit, up to Category 4 of EN 954-1 or SIL 3 per IEC 61508 can be achieved.
Ключові дані
| max_category | Category 4 of EN 954-1 or SIL 3 according to IEC 61508 (depending on device type and external circuit) |
|---|---|
| basic_units_category | Up to Category 3 according to EN 954-1 |
| mounting | Snap-on mounting on TH 35 standard mounting rail according to EN 60715; screw fixing with 2 additional 3RP19 03 push-in lugs |
Застосування
- EMERGENCY-STOP circuits
- Safety circuits according to EN 60204-1 (11.98), e.g. moving covers and protective doors
- Cascading with 3TK28 41, 3TK28 42, 3TK28 45, 3TK28 53 safety relays and 3RA7 11 load feeder via safe solid-state output (terminal 2)
- Connection of expansion units 3TK28 30, 3TK28 56, 3TK28 57, 3RA7 11 to 3RA7 14, external actuators or loads via safe solid-state output (terminal 2)
- Normal switching duty via connection of a PLC output
Особливості
- Combination of solid-state safety relay and contactor relays with positively-driven contacts in one certified complete unit
- Basic units 3TK28 50–52: two contactor relays as floating switch blocks, three LEDs for operating state and function
- 3TK28 53: two contactor relays plus safe solid-state output, safe cascading input, input for normal switching duty
- Cyclic monitoring of all internal circuit elements during operation; self-test at start-up
- Automatic or monitored start depending on parameterization (AS/ÜS)
- Optional crossover monitoring (QS)
- 3TK28 57 offers delayed (OFF-delay tv) enabling circuits; 3TK28 56 instantaneous
Технічні дані
| Parameter | Value |
|---|---|
| Max achievable category | Category 4 of EN 954-1 or SIL 3 according to IEC 61508 (depending on device type and external circuit) |
| Basic units 3TK28 50–52 category | Up to Category 3 according to EN 954-1, depending on external circuit |
| Sensor inputs (basic units 3TK28 50–52) | One sensor input each, varying number of contactor relay enabling circuits and signaling outputs |
| 3TK28 53 | One sensor input, one cascading input, one input for normal switching duty, solid-state and contactor relay enabling circuits |
| Expansion units 3TK28 56/57 | One cascading input, one input for normal switching duty, solid-state enabling circuits or contactor relay enabling/signaling outputs |
| Start behavior | Automatic start (AS) or automatic/monitored start (AS/ÜS) depending on parameterization |
| Time delay (3TK28 57) | OFF-delay tv, time-delayed NO contacts (NOtv) |
| Mounting | Snap-on TH 35 standard mounting rail per EN 60715; screw fixing via 2 × 3RP19 03 push-in lugs |
| Indication | Three LEDs for operating state and function |
Варіанти замовлення
- 3TK28 50 – basic unit, 1-/2-channel AS/ÜS, FK hs (NO) enabling circuits
- 3TK28 51 – basic unit, 1-/2-channel AS/ÜS, FK hs (NO), MK hs (NC)
- 3TK28 52 – basic unit, 1-/2-channel AS/ÜS, multiple FK hs (NO)
- 3TK28 53 – basic unit with cascading input (KAS), normal switching duty (BS), QS crossover monitoring option, FK hs / FK el / MK hs outputs
- 3TK28 56 – expansion unit, instantaneous
- 3TK28 57 – expansion unit, delayed (tv)
Допуски та стандарти
- EN 418 (Category 4 devices)
- EN 954-1 (Category 3 / Category 4)
- EN 60204-1 (11.98)
- IEC 61508 (SIL 3)
- EN 60715 (TH 35 mounting rail)
- Certified by the appropriate authorities as a complete unit
Текст документа
3TK28 Safety Relays
With contactor relay enabling circuits
■ Design
The solid-state safety relays can be used in EMERGENCY-STOP Basic units, Category 4
devices according to EN 418 and in safety circuits according to
EN 60204-1 (11.98), for example, for moving covers and protec- The 3TK28 53 solid-state safety relay has two contactor relays
tive doors. Depending on the device type and the external snapped onto the safety solid-state units as floating switch
circuit, the maximum category that can be achieved is Category blocks, as well as a safe solid-state output, a safe input for
4 of EN 954-1 or SIL 3 according to IEC 61508. cascading and one input for normal switching duty. Three LEDs
indicate the operating state and the function.
With these devices, solid-state safety relays are connected with
contactor relays. The combination is supplied as a complete During start-up, the device runs through a self-test in which the
unit, fully wired up and tested, for snapping onto a standard internal electronics are checked for correct functioning. During
mounting rail. This unit combines the advantages of a solid-state operation, all internal circuit elements are monitored cyclically
safety relay and those of contactor relays with positively-driven for faults.
contacts in a single device. It has been certified by the Expansion units, namely 3TK28 30, 3TK28 56, 3TK28 57,
appropriate authorities as a complete unit. 3RA7 11 to 3RA7 14, as well as external actuators or loads can
be connected using the safe solid-state output (terminal 2).
Basic units, Category 3 Cascading with the 3TK28 41, 3TK28 42, 3TK28 45 and
The solid-state safety relays 3TK28 50, 3TK28 51 and 3TK28 52 3TK28 53 safety relays as well as with the 3RA7 11 load feeder
have two contactor relays snapped onto the safety solid-state is also possible using the safe solid-state output (terminal 2).
unit as floating switch blocks. Three LEDs indicate the operating
state and the function. During operation, all internal circuit Installation
elements are monitored cyclically for faults. Up to Category 3 For snap-on mounting on TH 35 standard mounting rail
according to EN 954-1 is achieved, depending on the external according to EN 60715. Screw fixing is also possible for the
circuit. devices by means of 2 additional 3RP19 03 push-in lugs.
■ Function
Basic units
3TK28 52 basic unit
3TK28 50 to 3TK28 52 FK hs
S1
AS/ÜS (NO)
The devices 3TK28 50 to 3TK28 52 each have one sensor input
and a varying number of contactor relay enabling circuits and FK hs
signaling outputs. If the signal is no longer applied to the sensor (NO)
input, the enabling circuits are isolated immediately.
FK hs
(NO)
FK hs
3TK28 50 basic unit (NO)
S1 FK hs FK hs
AS/ÜS (NO) (NO)
FK hs FK hs
(NO) (NO)
FK hs MKhs
(NO) (NO)
7
NSC0_00689a
1-/2-channel AS/ÜS NSC0_00691a
1-/2-channel AS/ÜS
Legend
Sensor interface
Sx: Sensor input
3TK28 51 basic unit Safety logic
FK hs AS/ÜS: Automatic or monitored start depending on the parameterization
S1
AS/ÜS (NO)
Parameters
FK hs 1-/2-channel: One-channel / two-channel sensor connection
(NO) AS/ÜS: Automatic or monitored start depending on the
parameterization
MK hs Actuator interface
(NC)
FKhs: Enabling circuit, contactor relay (floating)
NSC0_00690a
MKhs: Signaling circuit, contactor relay (floating)
NO: NO contact
1-/2-channel AS/ÜS NC: NC contact
7/116 Siemens LV 1 T · 2007
3TK28 Safety Relays
With contactor relay enabling circuits
Basic units Expansion units
3TK28 53 3TK28 56 and 3TK28 57
The 3TK28 53 has one sensor input and one one input for normal The 3TK28 56 and 3TK28 57 devices each have one one input
switching duty and one cascading input. On the output side is a for normal switching duty and one cascading input. On the
varying number number of solid-state enabling circuits or output side is a varying number number of solid-state enabling
contactor relay enabling circuits. If the signal is no longer circuits or contactor relay enabling circuits and signaling
applied to one of the inputs, the enabling circuits are isolated outputs. If the signal is no longer applied to one of the inputs, the
immediately. Autostart or monitored start can be selected in the enabling circuits are isolated immediately or according to the set
parameterization. delay time.
3TK28 53 Basic unit 3TK28 56 expansion unit instantaneous
FK hs FK hs
BS BS
AS & (NO) & ( NO)
AS/ÜS FK hs FK hs
KAS KAS
(NO) (NO)
AS/ÜS
FK hs FK hs
S1
(NO) (NO)
FK el FK hs
(NO) (NO)
NSC0_00692
FK hs
QS AS/ÜS (NO)
FK hs
(NO)
Legend
Sensor interface FK el
Sx: Sensor input (NO)
KAS/BS: Cascading input or normal switching duty..
Normal switching duty: Connection of a PLC output for example. MK hs
The enabling circuits and hence the connected loads can then (NC)
be operated by the machine control.
NSC0_00693
The safety function is on a higher level.
Safety logic
AS: Automatic start. Device starts automatically once the
enabling conditions are fulfilled. If a START button is integrated in
the feedback circuit, a manual start is also possible (up to
Category 3 according to EN 954-1).
AS/ÜS: Automatic or monitored start depending on the parameterization
Parameters
QS: With or without crossover monitoring
AS/ÜS: Automatic or monitored start depending on the parameterization 3TK28 57 expansion unit delayed
FK hs
BS tv
(NOtv )
tv Time delay, OFF-delay &
FK hs
Actuator interface KAS tv
tv tv )
(NO 7
FKel: Enabling circuit, solid-state (non-floating)
FKhs: Enabling circuit, contactor relay (floating) FK hs
MKhs: Signaling circuit, contactor relay (floating) tv
(NO tv)
NO: NO contact
NSC0_00694
NOtv: NO contact, time-delayed FK el
NC: NC contact
(NO)
Siemens LV 1 T · 2007 7/117
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