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
Note 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 stock type Standard versions, in stock or available at short notice 1187202
Type    Material no.   
Ex HS Si 4 1Ö/1S - 10m 1185205
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

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
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Actuators

Type   Material no.  
Type    Material no.   
Actuating magnet coded Ex MC 4 stock type Standard versions, in stock or available at short notice 1182903
Type    Material no.   
Actuating magnet coded Ex MC 4/90° stock type Standard versions, in stock or available at short notice 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