Timer or Clock, Ex nA, field mounting

Timer or Clocks


  • To be discontinued, ATEX Ex nA certification will be de-harmonised in 2022, alternative is BA374G.
  • Intrinsic safety certification
  • Proximity detector, open collector, magnetic pick-off, voltage pulse, or switch contact input.
  • Two separate displays
  • Two inputs
  • Isolated status output
  • Optional:
  • Internally powered display backlight
    Isolated dual Control Outputs
    Stainless steel legend plate
IECEx logoEX logoETL logo

Product details
This versatile Ex nA and Ex tc certified Timer or Clock can perform a host of timing and control functions, such as sampling or dosing, within a Zone 2 or 22 hazardous area without the need for Zener barriers or galvanic isolators, thus significantly reducing cost. An easy to use state and event structure enables relatively complex timing functions to be easily configured. Timing operations may be started and stopped via the inputs, or from the front panel buttons. The instrument display shows progress of the operation and international certification permits worldwide installation.

An internally powered backlight is available as a factory fitted accessory.

Instruments can be supplied configured and fitted with a customer specified printed scale card showing the units of time for no additional charge. An optional Stainless Steel legend plate is also available which can be supplied laser engraved with customer specified tag and application information.

To select the options for your application please refer to the following table.

Model BA374NG
BA374NG #
Mounting & Enclosure Field 122 x 120mm
Protection IP66
Display 8 digits 18mm high
and 6 digits 12mm high
No. of inputs
Certification   Ex ic certification codes only refer to the instrument push button contacts which are nonincendive.
Ex nA ic IIC T5 Gc
Ex ic tc IIIC T80°C Dc
-40°C ≤ Ta ≤ +60°C
Group II Category 3GD
Ex nA ic IIC T5 Gc
Ex ic tc IIIC T80≤C Dc
-40°C ≤ Ta ≤ +60°C
Class I Zone 2 AEx nA ic IIC T5 Gc
Zone 22 AEx ic tc IIIC T80°C Dc
-40°C ≤ Ta ≤ 60°C
Canada cETL
Ex nA ic IIC T5 Gc
Ex n IIC T5 Gc
Ex ic tc IIIC T80°C Dc
Class III Div 2 Class II Div 2 Gp F, G
-40°C ≤ Ta ≤ 60°C
Control output

Mounting &
No. of inputs
Downloads BA374NG
Datasheet PDFDownload
IECEx certificate PDFDownload
ATEX certificate PDFDownload
ETL & cETL certificate
Ingress certificate PDFDownload
Instruction manual PDFDownload
Abbreviated manual PDFDownload
Application guide PDFDownload
Declaration of Conformity (EU)
CAD files PDFDownload

# Shown with optional backlight, separately powered.