Ex HS Si 4

  • Ex zone 1 and 21
  • Thermoplastic enclosure
  • Suitable for the food processing industry
  • Hall elements, coded
  • Actuation from front
  • Switching distance up to 7 mm
  • With pre-wired cable
  • Special version only for gas Ex zone 2 and dust Ex zone 22 available
  • Attention: Please state required international approvals with your order!
Note
  • The actuator is not included in the delivery of the switches

Technical data

Applied standards EN 60079-0, EN 60079-18, EN 60947-5-2, EN 60947-5-3, EN ISO 14119, EN ISO 13849-1, EN 62061
Enclosure thermoplastic, glass-fibre reinforced, impact resistant, self-extinguishing UL 94 V-0
Defined object actuator Ex MC 4
Sensor type type 4 interlocking device
Coding level low coding
Degree of protection IP 67 to IEC/EN 60529
Safety-relevant data:
EN ISO 13849-1 Performance Level PL e
Category 4
TM max. 20 years
MTTFd > 100 years
DC/DCavg > 99 %
EN 62061 SIL CL 3
PFHd ≥ 2.47 x 10-8 1/h
Switching system Hall sensor, 2 galvanically separated channels, semiconductor
1 NC/1 NO or 2 NC contacts
Connection cable 6 x AWG 26
Cable length 2, 5 or 10 m, max. 15 m
Rated operating voltage Ue 24 VDC
Rated operating voltage range UB 10 … 30 VDC
Rated operating current Ie max. 40 mA per channel
Utilisation category DC-12
No-load supply current I0 max. 6 mA per channel
Voltage drop at Ie max. 2.5 V
Switch-on/switch-off time < 1 ms
Short-circuit protection < 50 mA internal reversible fuse
Switching frequency max. 100 Hz
Safety class II
Degree of pollution 3
Ambient temperature –20 °C … +60 °C
Mechanical life > 10 million operations
Switching distances sn 7 mm, sao 6 mm, sar 20 mm
Repeatability ≤ 5 %
Impact energy max. 7 J
Ex marking II 2G Ex mb IIC T6 Gb,
II 2D Ex mb IIIC T80°C Db
IECEx Ex mb IIC T6 Gb
Ex mb IIIC T80°C Db
Approvals BVS 08 ATEX E 150 X
IECEx BVS 08.0054X
Notes The safety-related data are only valid in combination with a safety module, e.g. SRM 21 RT2 (mat. no. 1179203).

Ordering details

1 NC/1 NO contact

Type   Material no.  
Type    Material no.   
Ex HS Si 4 1Ö/1S - 2m 1189003
Type    Material no.   
Ex HS Si 4 1Ö/1S - 5m 1187202
Type    Material no.   
Ex HS Si 4 1Ö/1S - 10m 1185205

2 NC contacts

Type   Material no.  
Type    Material no.   
Ex HS Si 4 2Ö - 2m 1189005
Type    Material no.   
Ex HS Si 4 2Ö - 5m 1188792
Type    Material no.   
Ex HS Si 4 2Ö - 10m 1189918

Actuators

Type   Material no.  
Type    Material no.   
Actuating magnet coded Ex MC 4 1182903
Type    Material no.   
Actuating magnet coded Ex MC 4/90° 1184680

Accessories

Safety relay module SRM 21 RT2
  • Enclosure width: 22.5 mm
  • 2 NC or 1 NC/1 NO contact can be connected
  • Feedback circuit
  • 2 enabling paths
  • 1 transistor output
  • Manual or automatic reset
  • LED indicator for switching condition
  • Crossed wire monitoring