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- Ex zone 1 and 21
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Ex STM 295
Features/Options
- Ex zone 1 and 21
- Thermoplastic enclosure
- Wiring compartment
- Spring-to-lock or power-to-lock principle
- Two Ex switch inserts in one enclosure
- Double insulated
- Holding force 1000 N
- Actuator can be repositioned by 90° on request
- Special version only for gas Ex zone 2 and dust Ex zone 22 available
- N.B.: Please state required approvals for Russia, Brazil and North America with your order!
Note
- The actuator is not included in the delivery of the switches
Technical data
| Standards | EN 60947-5-1; EN ISO 14119; EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-18; EN 61241-0, EN 61241-1; EN ISO 13849-1 |
|---|---|
| Enclosure | glass-fibre reinforced, shock-proof thermoplastic (PA 66), self-extinguishing |
| Actuator | stainless steel 1.4301 |
| Switch type | type 2 |
| Coding level | low coding |
| Switch insert | Ex 95 |
| Degree of protection | IP 64 to IEC/EN 60529 |
| Contact material | silver |
| Switching system | slow action, positive break NC contacts  |
| Switching elements | 2 NC/2 NO contacts, galvanically separated contact bridges |
| Connection | screw connection terminals |
| Cable cross-section | max. 1.5 mm² (incl. conductor ferrules) |
| Cable entry | 2 x M20 x 1.5 for cable section 5 … 9 mm |
| B10d (10 % Load) | 1 million |
| TM | max. 20 years |
| Uimp | 4 kV |
| Ui | 250 V |
| Ithe | 3 A |
| Ie/Ue | 3 A/250 VAC; 0.25 A/230 VDC |
| Utilisation category | AC-15; DC-13 |
| Max. fuse rating | 6 A gG/gN fuse |
| Ie/Ue magnet | 0.08 A / 24 VDC +10 %/–15 % |
| Power consumption | max. 47 W (0.25 s) |
| Ambient temperature | –20 °C … +55 °C |
| Mechanical life | > 500 000 operations |
| Holding force F | max. 1000 N |
| Impact energy | max. 7 J |
| Ex marking |  II 2G Ex demb IIC T4 Gb,II 2D Ex tD A21 IP64 T100 °CIECEx Ex demb IIC T4, Ex tD A21 IP64 T100 °C |
| Approvals | BVS 10 ATEX E 053 X IECEx BVS 11.0030X    |
Stock types
| Ordering details |
 |
Spring-to-lock principle
2 NC/2 NO contacts
| Type | Material no. | |
| Ex STM 295 2Ö/2S-R | 1186429 | |
| Ex STM 295 2Ö/2S-R/90° | 1188541 |
Spring-to-lock principle
2 NC/2 NO contacts
with manual release FE
| Type | Material no. | |
| Ex STM 295 2Ö/2S-R-FE | 1186394 | |
| Ex STM 295 2Ö/2S-R/90°-FE | 1188545 |
Power-to-lock principle
2 NC/2 NO contacts
| Type | Material no. | |
| Ex STM 295 2Ö/2S-A | 1184799 | |
| Ex STM 295 2Ö/2S-A/90° | 1188542 |
| Actuators |
| Type | Material no. | |
| Straight actuator STM 295-B1 | 1183481 |
| Type | Material no. | |
| Angled actuator STM 295-B5 | 1183470 |
| Type | Material no. | |
| Flexible actuator STM 295-B6 | 1435030 |
| Accessories |
| Type | Material no. | |
| M5 triangular key | 1182300 |