Ex HS Si 4

Features/Options

  • Ex zone 1 and 21
  • Thermoplastic enclosure
  • Hall elements, coded
  • Actuation from front
  • Switching distance up to 8 mm
  • With pre-wired cable
  • Special version only for gas Ex zone 2 and dust Ex zone 22 available
  • N.B.: Please state required international approvals with your order!
Note
  • The actuator is not included in the delivery of the switches

Technical data

StandardsEN 60079-0, EN 60079-18;
EN 60947-5-2; EN ISO 14119;
EN ISO 13849-1
Enclosureglass-fibre reinforced, shock-proof thermoplastic (PA 66), self-extinguishing UL 94-V0
Sensor typetype 4 interlocking device
Coding levellow coding
Actuatoractuator Ex MC 4
Degree of protectionIP 67 to IEC/EN 60529
Switching systemHall sensor, 2 galvanically separated channels, semiconductor
1 NC/1 NO or 2 NC contacts
Connectioncable 6 x AWG 26
Cable length2, 5 or 10 m, max. 15 m
 
Safety-relevant data:*
TMmax. 20 years
MTTFd> 100 years
DC/DCavg> 99 %
 
Utilisation categoryDC-12
Rated operating voltage Ue24 VDC
Rated operating current Iemax. 40 mA per channel
Ui75 VDC
Uimp1 kV
No-load supply current I0max. 6 mA per channel
Input voltage10 … 30 VDC
Voltage drop at Iemax. 2.5 VDC
Switch-on/switch-off time< 1 ms
Max. fuse rating< 50 mA internal reversible fuse
Switching frequencymax. 100 Hz
Safety classII
Degree of pollution3
Ambient temperature–20 °C … +60 °C
Storage and shipping temperature–40 °C … +70 °C
Mechanical life> 10 million operations
Switching distancessn 7 mm, sao 6 mm, sar 20 mm
Impact energymax. 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
ApprovalsBVS 08 ATEX E 150 X
IECEx BVS 08.0054X

* is only achieved in combination with a safety module
Ordering details
Type code

1 NC/1 NO contact

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

2 NC contacts

Type   Material no.
Ex HS Si 4 2Ö - 2m 1189005
Ex HS Si 4 2Ö - 5m 1188792
Ex HS Si 4 2Ö - 10m 1189918
Actuators
Type   Material no.
Actuator Ex MC 4 1182903
Actuator Ex MC 4/90° 1184680
Accessories
Type   Material no.
Safety relay module SRM 21 RT2 1179203