During loading and unloading inflammable liquids or solids an explosive gas and dust atmosphere may arise – a single spark can be sufficient to initiate an explosion. To prevent this, the occurring electrostatic charges must be discharged safely.

TIMM’s Grounding Control Devices ensure static electricity is discharged to the ground by a grounding cable and continuously monitor the grounding quality. If there is an interruption of the grounding connection, the filling process will be interrupted immediately.


  • Prevents manipulation due to object recognition (by measuring the impedance)
  • Opening of the housing during operation in gas hazardous areas is allowed
  • Automatic diagnosis system self-monitors all safety-related functions continuously
  • Due to the cable compensation, it is also possible to connect cables up to 30 m
  • NAMUR-compatible Ex i control output

Timm EKX-4 Grounding Control Device application top loading tank trucks
  • Ensures safe grounding before and during the loading operation
  • For use in gas and dust hazardous areas of zone 1 (equipment category II 2 G) and 21 (II 2 D)
  • Controlled derivation of the static electricity
  • Immediate interruption of the loading operation when unsafe grounding connection consists
  • According to all currently relevant EMC and ATEX directives
  • High functional safety according to EN 61508 / SIL 2 (Hardware-Assessment)
  • Device configuration (e.g. “road tank truck“, “railway tank wagon“) via internal switches
  • Easy adjustment of limit values for object detection to local conditions
  • Continuous self-monitoring of the redundant output signal
  • Additional control output
  • Multicolored LED-display to indicate the operating status, failure diagnosis and object recognition settings
  • Extremely sturdy housing, especially resistant to chemicals and other environmental influences
Type of Protection:According to ATEX-standard 2014/34/EU:
Ex II 2 G – Ex eb q [ib] IIC T4 Gb
Ex II 2 D – Ex tb [ib] IIIC T80°C Db
EC Type Examination:TÜV 11 ATEX 080882
Power Supply:230 V AC ± 10 %, 50 Hz, ca. 10 VA
type of protection “increased safety“ Ex eb
Measuring Circuit:Max. Uo = 6, 7 V; Io = 68 mA; Po = 114 mW
Max. 50 m (ex related specification, functional limitations must be observed)
Type of protection Ex ib / ibD
Only for connection of the grounding cable
The measuring circuit is grounded
Contact Release Output:Switching power max 250 VAC 3 A 100 VA
Type of protection “increased safety“ Ex eb
2 voltage free closing contact, internal monitored
Auxiliary Output:Switching power max. 250 VAC 3 A 100 VA
Type of protection “increased safety“ Ex eb
voltage free changeover contact, not monitored
Electronic Release Output:Max. Ui = 20 V Ii = 20 mA Pi = 400 mW
Inner capacitances Ci negligibly small
Inner inductances Li negligibly small
Type of protection “intrinsic safety“ Ex ib
1 NAMUR-compatible transistor output
Internal resistance: 1 kΩ or 11 kΩ
Modulation: 10 Hz, duty factor 1:1
Protection of Enclosure:IP65
Operation Temperature:- 30 °C up to + 60°C
Dimensions (W x L x H):170 mm x 306 mm x 110 mm
Weight:approx. 4.5 kg

Please get in touch with our sales department for the operating manual and the 3D CAD/.step file.

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Grounding Control Device EKX-4

Get an overview of the various configuration options of Grounding Control Device EKX-4 by clicking on configuration overview.

For more information about the ATEX certified accessories for Grounding Control Device EKX-4, visit our online shop.