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 1354452

Slow action, 2 NC contacts

Type   Material no.  
Type    Material no.   
Ex ES 99 ST-02 -60°C X 1442235

Actuators

Straight actuators

Type   Material no.  
Type    Material no.   
Straight actuator ST 98/99-B1 1451618
Type    Material no.   
Straight actuator ST 98/99-B1 with rubber 1451736

Angled actuators

Type   Material no.  
Type    Material no.   
Angled actuator ST 98/99-B5 1451863

Flexible actuators

Type   Material no.  
Type    Material no.   
Flexible actuator ST 98/99-B6 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