Ex 99 ST

  • Ex zone 1 and 21
  • Thermoplastic enclosure, double insulated
  • Cold-resistant (storage/Ex protection down to –60 °C; mechanical function down to –50 °C)
  • High degree of protection IP 66 / IP 67 / IP 69
  • Suitable for the food processing industry
  • Wiring compartment
  • Actuator head can be repositioned by 4 x 90°
  • Mounting details to EN 50041
Note
  • The actuator is not included in the delivery of the switches

Technical data

Applied standards EN 60947-5-1, EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-31, EN ISO 13849-1, EN ISO 14119
Enclosure thermoplastic, glass-fibre reinforced, impact resistant, self-extinguishing UL 94 V-0
Cover thermoset, glass-fibre reinforced, impact resistant, self-extinguishing UL 94 V-0
Sealing silicone
Switch type type 2
Coding level low coding
Tightening torque cover screws: 1.5 … 2 Nm
connecting thread of cable gland: max. 2 Nm
cap nut of cable gland: max. 5 Nm
Degree of protection IP 66 (EN 60079-0 + IEC/EN 60529)
IP 67, IP 69 (IEC/EN 60529)
IP 69K (ISO 20653)
B10d (10 % load) 2 million
TM max. 20 years
Switch insert Type 8080/1 ...
Contact material Silver, nickel-plated
Switching system slow action, positive break NC contacts
Switching elements 1 NC/1 NO contact or 2 NC contacts, type Zb
Connection screw connection terminals
Cable cross-section min. 0,75 mm² / AWG 18, max. 1,5 mm² / AWG 16, incl. conductor ferrules
Cable entry M20 x 1,5; screwing depth max. 9 mm; use only Ex approved and certified cable glands with min. degree of protection IP 66 and suitable for the specified ambient temperature range
Utilisation category AC-15
Rated operating current Ie max. 2 A or 4 A
Rated operating voltage Ue max. 500 VAC, 2Ö: max. 400 VAC
max. 250 VAC for unequal potential
Mechanical life > 1 million operations
Impact energy max. 7 J down to -40 °C
max. 4 J down to -60 °C
Temperature class T6
Ambient temperature –50 °C … +55 °C max. 4 A, +60 °C max. 2 A
Storage and shipping temperature –60 °C … +60 °C
Short-circuit protection 2 A / 4 A gG/gN fuse
Ex marking II 2G Ex db eb IIC T6 Gb,
II 2D Ex tb IIIC T80 °C Db
IECEx Ex db eb IIC T6 Gb,
Ex tb IIIC T80 °C Db
Approvals BVS 16 ATEX E113 X
IECEx BVS 16.0076X

Ordering details

Slow action, 1 NC/1 NO contact

Type   Material no.  
Type    Material no.   
Ex ES 99 ST-11 -60°C X stock type Standard versions, in stock or available at short notice 1354452
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Slow action, 2 NC contacts

Type   Material no.  
Type    Material no.   
Ex ES 99 ST-02 -60°C X 1442235
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Actuators

Straight actuators

Type   Material no.  
Type    Material no.   
Straight actuator ST 98/99-B1 stock type Standard versions, in stock or available at short notice 1451618
Type    Material no.   
Straight actuator ST 98/99-B1 with rubber stock type Standard versions, in stock or available at short notice 1451736

Angled actuators

Type   Material no.  
Type    Material no.   
Angled actuator ST 98/99-B5 stock type Standard versions, in stock or available at short notice 1451863

Flexible actuators

Type   Material no.  
Type    Material no.   
Flexible actuator ST 98/99-B6 stock type Standard versions, in stock or available at short notice 1451865

Accessories

Ex e cable gland M20x1.5 -60 °C
  • For series Ex 97 / Ex 99
  • Explosion protection method Ex „e“ (increased safety)
  • Cold-resistant down to -60 °C