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Fieldbus power supply

Effective fieldbus power supplies
Single or redundant ISbus series fieldbus power supplies can be used to power fieldbus segments. A high output, integrated physical layer diagnostics, galvanic separation and a switchable end-of-line resistor are ingredients that combine to produce an effective fieldbus power supply for any installation.

Single or redundant 9412 series fieldbus power supplies can be used to power FOUNDATION™ Fieldbus H1 segments. Their high output of up to 28 V and 500 mA allows large numbers of devices to be operated far away. For high-power applications, two power supplies can supply up to 1 A in parallel in boost mode. All models monitor the fieldbus segments to check for overloading and short-circuiting, as well as diagnosing the fieldbus's advanced physical layer parameters, which include jitter and signal level, for example.

To go with the 9412 series fieldbus power supplies, our range includes the 9419 series bus carriers. These are also available in versions that are specially tailored for use with distributed control systems. This guarantees quick, cost-saving installation.

  • Integrated advanced physical layer diagnostics with signalling contact, adjustable warning level and LED indicator
  • High output of up to 28 V/1 A for long segments and a high number of field devices
  • Serial interface for easy-to-read diagnostic data via a smartphone app

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Application range (Zone)
Segment supply Ua
Connection type

5 Series (10 Products)

Fieldbus Power Supply Series 9412

  • For single or redundant power supply to FOUNDATION Fieldbus H1 segments (High Power Trunk)
  • Output > 28 V, up to 1 A, galvanically separated
  • Integrated advanced physical layer diagnostics

bus-Carrier Series 9419

  • Time- and cost-saving installation on DIN rails or mounting plates
  • High availability thanks to redundant auxiliary power supply with signalling contact and separate signalling contact for segment errors
  • Special slot for 9415 series DCM for online transmission of physical layer diagnostics

bus-Carrier Yokogawa ALF111 Version Series 9419

  • Time- and cost-saving installation on DIN rails or mounting plates
  • High availability thanks to redundant auxiliary power supply with signalling contact and separate signalling contact for segment errors
  • Special slot for 9415 series DCM for online transmission of physical layer diagnostics

Fieldbus Power Supply Set Series 9420

  • For single or redundant power supply to the Foundation fieldbus H1 segments (high power trunk)
  • The complete set includes bus-Carriers and fieldbus power supply units
  • Slot for the 9415 diagnostics communication module for the transmission of physical layer data

bus-Carrier for Linking Device Series 9419

  • Time- and cost-saving installation on DIN rails or mounting plates
  • high availability thanks to redundant auxiliary power supply with signalling contact and separate signalling contact for segment errors
  • Special slot for FG-200 linking device for the Softing pnGate PA and for DCM series 9415 for online transmission of physical layer diagnostics
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