HomeProductsElectromechanical safety switches with guard lockingSTA metal switch with metal headSTA3A-4121A024MF-EX
Safety switch STA with door monitoring contact, ATEX
- ATEX version
- Suitable for use in zones 2 and 22 (gases and dusts)
- Auxiliary release on the front
- With door monitoring contact
![STA3A-4121A024MF-EX (Order no. 115586)](https://assets2.euchner.de/files/55/03/ast_735503_xl.png)
Description
Solenoid operating voltage
- AC/DC 24 V +10%, -15%
Guard locking type
STA3 | Closed-circuit current principle, guard locking by spring force. Release by applying voltage to the guard locking solenoid. |
Switching element
4121 | Slow-action switching contact 2 NC |
Auxiliary release
This is used for releasing the guard locking with the aid of a tool. To protect against tampering, the auxiliary release is sealed with sealing lacquer.
Functional drawings
![Functional drawings](https://assets2.euchner.de/files/29/11/ast_652911.png)
Dimensional drawings
![Dimensional drawings](https://assets2.euchner.de/files/52/95/ast_635295.png)
1 | Auxiliary release |
2 | Cover screw (4x M = 1.5 Nm) |
3 | Locking screw |
4 | Ground the switch via the earth conductor terminal to prevent electrostatic charging (conductor cross-section 4 mm²) |
5 | ATEX cable gland for included (cable diameter 6.5...12 mm) |
6 | Two screw plugs included (M = 2 Nm) |
Connection examples
![Connection examples](https://assets2.euchner.de/files/50/92/ast_655092.png)
![]() | Door monitoring |
![]() | Solenoid monitoring |
Technical data
Approvals
![EAC_RU C-DE.MO05.B.00971/20](https://assets2.euchner.de/files/06/97/ast_630697_m.png)
![c_UL_us_E155795_2/1](https://assets2.euchner.de/files/82/74/ast_628274_m.png)
![CCC_2020980305000541_CQC2008010305306207](https://assets2.euchner.de/files/07/52/ast_630752_m.png)
Electrical connection values
Power consumption | 8 W |
Connection cross section | 0.34 ... 1.5 mm² |
Rated insulation voltage Ui | 50 V |
Rated impulse withstand voltage Uimp | 2.5 kV |
Utilization category | |
DC-13 | 4 A 24 V |
AC-15 | 4 A 50 V |
Short circuit protection according to IEC 60269-1 | 4A gG |
Solenoid operating voltage | |
AC/DC | 24 V -15% ... +10% |
Solenoid duty cycle | 100 % |
Switching voltage | |
min. at 10 mA | 12 V |
Switching current | |
min. at 24 V | 1 mA |
thermal rated current Ith | 4 A |
Mechanical values and environment
Approach speed | max. 20 m/min |
Approach direction | A |
Connection type | |
3 x | Cable gland M20 x 1.5 |
Number of door position NC contacts | 1 |
Number of door position NO contacts | 1 |
Number of guard lock monitoring positively driven contacts | 2 |
Extraction force | 30 N |
Actuation frequency | max. 1200 1/h |
Actuating force | 35 N |
Installation orientation | any |
Insertion depth | 24.5 mm |
Clamping range for cable | 6.5 ... 12 mm |
Mechanical life | 1 x 10⁶ |
Retention force | 20 N |
Switching principle | Slow-action switching contact |
Degree of protection | IP67 |
Ambient temperature | -20 ... +75 °C |
Material | |
Contact | Silver alloy, gold flashed |
Housing | Die-cast alloy |
Locking force Fmax | 3000 N |
Locking force FZh | 2300 N |
Guard locking principle | Closed-circuit current principle |
Characteristic values according to EN ISO 13849-1 and EN IEC 62061
B10D | Mission time | |
---|---|---|
Monitoring of the guard position | 1.15x107 | 20 y |
Important! Values valid at DC-13 100 mA/24V | ||
Monitoring of guard locking | 1.15x107 | 20 y |
Important! Values valid at DC-13 100 mA/24V |
PL | Maximum SIL | Category | Mission time | |
---|---|---|---|---|
Control of guard locking | Depending on external control of guard locking | 20 y |
Miscellaneous
Explosion protection | |
incl. cable gland | II3G Ex nR IIB T4 Gc X /II3D Ex tc IIIC T110°C Dc X |
In combination with actuator ACTUATOR-S-G-SN-C2115
Overtravel | 5 mm |
Accessories
Actuator
Downloads
Complete package
Download all important documents with a single click.
Content:
- The operating instructions and any additions to the operating instructions or brief instructions
- Any data sheets to supplement the operating instructions
- The declaration of conformity
Single Documents
Declarations of conformity
EU-Konformitätserklärung
Doc. no.
Version
Language
Size
![Doc. no. EDC2093482](https://assets2.euchner.de/files/96/17/ast_3149617_thumb.jpg)
EU-Konformitätserklärung
Doc. no.
EDC2093482
Version
Language
Size
0,2 MB
UKCA-Konformitätserklärung
Doc. no.
Version
Language
Size
![Doc. no. EDC20001468](https://assets2.euchner.de/files/25/02/ast_2962502_thumb.jpg)
UKCA-Konformitätserklärung
Doc. no.
EDC20001468
Version
Language
Size
0,2 MB
Instructions
Operating Instructions Safety Switch STA…EX
Doc. no.
Version
Language
Size
![Doc. no. 2115582](https://assets2.euchner.de/files/58/48/ast_3215848_thumb.jpg)
Operating Instructions Safety Switch STA…EX
Mode d’emploi Interrupteur de sécurité STA…EX
Manual de instrucciones Interruptor de seguridad STA…EX
Betriebsanleitung Sicherheitsschalter STA…EX
Mode d’emploi Interrupteur de sécurité STA…EX
Manual de instrucciones Interruptor de seguridad STA…EX
Betriebsanleitung Sicherheitsschalter STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
4,9 MB
![Doc. no. 2115582](https://assets2.euchner.de/files/80/10/ast_3158010_thumb.jpg)
Betriebsanleitung Sicherheitsschalter STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
1,3 MB
![Doc. no. 2115582](https://assets2.euchner.de/files/58/44/ast_3215844_thumb.jpg)
Manual de instruções Chave de segurança STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
1,3 MB
![Doc. no. 2115582](https://assets2.euchner.de/files/58/46/ast_3215846_thumb.jpg)
Istruzioni di impiego Finecorsa di sicurezza STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
1,3 MB
![Doc. no. 2115582](https://assets2.euchner.de/files/58/45/ast_3215845_thumb.jpg)
使用说明书 安全开关 STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
1,4 MB
![Doc. no. 2115582](https://assets2.euchner.de/files/58/47/ast_3215847_thumb.jpg)
Инструкция по эксплуатации Предохранительный выключатель STA…EX
Doc. no.
2115582
Version
02/24
Language
Size
1,5 MB
Other Documents
Approvals and certificates
c UL us
Doc. no.
Version
Language
Size
![Doc. no.](https://assets2.euchner.de/files/33/82/ast_743382_thumb.jpg)
c UL us
Doc. no.
Version
Language
Size
0,3 MB
Sales documents
ATEX Interrupteurs de sécurité pour atmosphères explosibles
Doc. no.
Version
Language
Size
![Doc. no. 136806](https://assets2.euchner.de/files/85/79/ast_3328579_thumb.jpg)
ATEX Interrupteurs de sécurité pour atmosphères explosibles
Doc. no.
136806
Version
06-07/24
Language
Size
1,4 MB
ATEX Safety switches for potentially explosive atmospheres
Doc. no.
Version
Language
Size
![Doc. no. 136805](https://assets2.euchner.de/files/84/59/ast_3328459_thumb.jpg)
ATEX Safety switches for potentially explosive atmospheres
Doc. no.
136805
Version
06-07/24
Language
Size
1,4 MB
ATEX Sicherheitsschalter für explosionsgefährdete Bereiche
Doc. no.
Version
Language
Size
![Doc. no. 136804](https://assets2.euchner.de/files/83/46/ast_3328346_thumb.jpg)
ATEX Sicherheitsschalter für explosionsgefährdete Bereiche
Doc. no.
136804
Version
06-07/24
Language
Size
1,4 MB
Safety Switches with Metal Housing
Doc. no.
Version
Language
Size
![Doc. no. 100369](https://assets2.euchner.de/files/82/34/ast_438234_thumb.jpg)
Safety Switches with Metal Housing
Doc. no.
100369
Version
11-03/18
Language
Size
7,8 MB
![Doc. no. 100676](https://assets2.euchner.de/files/82/35/ast_438235_thumb.jpg)
Interrupteurs de sécurité avec boîtier métallique
Doc. no.
100676
Version
11-03/18
Language
Size
7,9 MB
![Doc. no. 104856](https://assets2.euchner.de/files/82/38/ast_438238_thumb.jpg)
Interruptores de seguridad con carcasa metálica
Doc. no.
104856
Version
11-03/18
Language
Size
14,0 MB
![Doc. no. 100319](https://assets2.euchner.de/files/82/36/ast_438236_thumb.jpg)
Sicherheitsschalter mit Metallgehäuse
Doc. no.
100319
Version
11-03/18
Language
Size
7,9 MB
![Doc. no. 102453](https://assets2.euchner.de/files/82/33/ast_438233_thumb.jpg)
金属壳体 的安全开关
Doc. no.
102453
Version
11-03/18
Language
Size
8,2 MB
![Doc. no. 121650](https://assets2.euchner.de/files/82/37/ast_438237_thumb.jpg)
Bezpečnostní spínače s kovovým pouzdrem
Doc. no.
121650
Version
11-03/18
Language
Size
7,8 MB
Safety Switches with Plastic Housing
Doc. no.
Version
Language
Size
![Doc. no. 096956](https://assets2.euchner.de/files/78/42/ast_437842_thumb.jpg)
Safety Switches with Plastic Housing
Doc. no.
096956
Version
11-03/18
Language
Size
6,5 MB
![Doc. no. 100677](https://assets2.euchner.de/files/78/41/ast_437841_thumb.jpg)
Interrupteurs de sécurité avec boîtier plastique
Doc. no.
100677
Version
11-03/18
Language
Size
6,6 MB
![Doc. no. 104855](https://assets2.euchner.de/files/78/40/ast_437840_thumb.jpg)
Interruptores de seguridad con carcasa plástica
Doc. no.
104855
Version
11-03/18
Language
Size
6,6 MB
![Doc. no. 096955](https://assets2.euchner.de/files/78/15/ast_437815_thumb.jpg)
Sicherheitsschalter mit Kunststoffgehäuse
Doc. no.
096955
Version
11-03/18
Language
Size
6,6 MB
![Doc. no. 116243](https://assets2.euchner.de/files/78/39/ast_437839_thumb.jpg)
塑料壳体 的安全开关
Doc. no.
116243
Version
11-03/18
Language
Size
6,1 MB
![Doc. no. 121649](https://assets2.euchner.de/files/78/43/ast_437843_thumb.jpg)
Bezpečnostní spínače s plastovým pouzdrem
Doc. no.
121649
Version
11-03/18
Language
Size
6,5 MB
Ordering data
Ordernumber | 115586 |
Item designation | STA3A-4121A024MF-EX |
Gross weight | 0,937kg |
Customs tariff number | 85365019000 |
ECLASS | 27-27-26-03 Safety switch with guard control |