Eaton MTL

MTL Instruments Group


Simplex FISCO Power Supplies

In a FISCO fieldbus network, the entire field circuit – including the trunk and all spurs - is intrinsically safe. The fieldbus power supply includes an intrinsic safety barrier, and provides conditioned power to the fieldbus segment in the hazardous area. The fieldbus instruments together with the power supply and any associated wiring components, must be certified as intrinsic safety apparatus and must comply with FISCO requirements. The field instruments may be located in a Zone 0 or 1, IIC or IIB hazardous area, depending on the certification of the individual components.

FISCO enjoys the benefits of any intrinsically safe instrumentation circuit. These advantages include the ability to live-work in the hazardous area without “gas clearance”, for example to add or remove a fieldbus instrument while the bus is energised in the presence of a flammable atmosphere. This is critical for Foundation fieldbus installations because field instruments need to be connected to a live network in order to establish communication with the host control system.

For easy integration with DCS Fieldbus Interface Modules (FIMs), we can supply Termination Boards that use the DCS client system interconnect cables. These support up to four power supplies and have built-in segment terminators.

Users wanting to connect to entity-only certified devices please refer to our spur connector range.

For a copy of the fieldbus SmartPlant Instrumentation (SPI) library <click here>

For the latest Fieldbus Segment Calculator tool that includes this product range <click here>

For product certificates <click here>

Product Code Description Downloads

intrinsically safe logo Symbol denotes that the equipment is suitable for use in hazardous area applications.
fsm logo Symbol denotes that the product has been assessed for functional safety applications

9121-IS   FISCO power supply ~ IIC Datasheet 
9122-IS   FISCO power supply ~ IIB Datasheet 
F606   Redundant / non-redundant 4-segment Termination Board for use with Yokogawa ALF-111 Fieldbus Datasheet 
F656A   Non-redundant 2-segment Remote Termination Panel for use with Honeywell Experion PKS Fieldbus Datasheet 
FISCO-CS   FISCO Common Specification Datasheet 
FISCO-OV   Overview of FISCO power supplies Datasheet 
INM9120   FISCO Instruction Manual Manual