FG 40 Ex

Incremental encoders

  • ATEX and IECEx certified (gas and dust) to EN/IEC 60079
  • Explosion-proof housing, salt-water proof aluminium, IP66
  • Up to 250000 pulses HTL/TTL, up to 2500 sine periods
  • Option: Second signal output
Incremental encodersAbsolute encoders
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The all-rounders with Ex protection

The incremental, solid shaft encoders FG 40 Ex can be deployed in a wide variety of applications to measure the speed at standard, main and secondary drives in potentially explosive atmospheres, for example in the oil and gas industry as well as in petrochemical applications. Certified to EN 60079 (ATEX) and IEC 60079 (IECEx) the encoder is certified for applications in Zones 1 and 2 (gas) as well as Zones 21 and 22 (dust) and designed to meet degree of protection requirements IP66. Technically, they are based on the FG 40 models. The explosion-proof housings with detachable terminal box covers facilitate connecting the cables during on site installation. That in turn means it is possible to use different cable lengths to connect a device of the same type.

Technical Data

AttributeValue
Supply voltage

12-30 VDC

Signal amplitude
  • HTL or TTL
  • Sin/Cos
Pulse rate
  • Standard pulse rates for HTL, TTL and Sin/Cos: 500, 600, 1000, 1024, 1200, 1300, 2500
  • Interpolation factors (for HTL/TTL pulses only): 1, 2, 4, 8, 10, 20, 40, 50, 100
Output signals

0°, 90°, N, status and inverted signals

Maximum frequency

Solid shaft: up to 6000 rpm / max. 200 kHz

Electrical connection

Terminal strip in a terminal box

Construction type / Ø shafts

Solid shaft (B5) / Ø 11 mm, Ø 14 mm with feather key

Device temperature range

-40 °C to +60 °C (T6 up to +55 °C)

Degree of protection

IP66

Weight

Approx. 3.9 kg

Device options
  • AK: System with terminal strip connections
  • AKK: Two systems with terminal strip connections
  • AH: HTL signals 0°, 90°, reference pulse, status; all signals each with respective inverted signals
  • AT: TTL signals 0°, 90°, reference pulse, status; all signals each with respective inverted signals
  • SH: 1 Vpp signals sine/cosine, reference pulse; status as HTL signal; all signals each with respective inverted signals
  • ST: 1 Vpp signals sine/cosine, reference pulse; status as TTL signal; all signals each with respective inverted signals
Mechanical options

Accessories: Cable glands and blanking plugs (not in scope of supply)

It is only allowed to use cable glands and blanking plugs that are approved and certified for the respective application in accordance with the standards EN/IEC 60079-0 and EN/IEC 60079-1 (gas) or EN/IEC 60079-31 (dust).

Special features and certificates

ATEX and IECEx certified to EN/IEC 60079:

  • Gas: II 2G Ex db IIC T6-T5 Gb
  • Dust: II 2D Ex tb IIIC T85°C Db IP6x

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