<3. Getting Started>
16
IM 01E21A02-03EN
3. Getting Started
Fieldbusfullyadoptsdigitalcommunicationprotocolanddiersinoperationfromconventional4
to20mAtransmissionprotocol.Itisrecommendedthatthosenoviceuserswhouseelddevices
forthersttimeshouldusethedeviceinaccordancewiththeproceduresdescribedinthis
section.Theproceduresassumethatelddeviceswillbesetuponabench.
3.1 Connection of Devices
The following devices are required to use Fieldbus devices:
z Power supply:
Fieldbus requires a dedicated power supply. It is recommended that current capacity be well
overthetotalvalueofthemaximumcurrentconsumedbyalldevices(includingthehost).
The conventional 4 -20 mA DC current cannot be used as is.
z Terminator:
Fieldbus requires two dedicated terminators. Refer to the supplier for details of terminators
that are attached to the host.
z Field device:
Connect the Fieldbus communication type product. This product or other devices can be
connected.
In order to smoothly start Fieldbus, please use the devices that has passed the
interoperability test of the Fieldbus Foundation.
z Host:
Usedforaccessingelddevices.Adedicatedhost(suchasDCS)isusedforan
instrumentation line while dedicated communication tools are used for experimental
purposes. For the operation of the host, refer to the instruction manual for each host. No
other details on the host are given in this manual. At least one device with the bus control
function is necessary.
z Cable:
Usedforconnectingdevices.Referto“FieldbusTechnicalInformation”(TI38K03A01-01E)
for details of instrumentation cabling. For laboratory or other experimental use, a twisted
paircabletwotothreemetersinlength(acrosssection0.9mm
2
(AXG#18)ormoreanda
cycleperiodofwithin5cm(2inches))maybeused.Terminationprocessingdependsonthe
type of device being deployed. For this product, use an M4 screw terminal claw. Some hosts
require a connector.
Contact Yokogawa when making arrangements to purchase the recommended devices.
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