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Hello everyone. Myself Bharadwaj. In the
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previous video, we discussed about
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In this video, I will discuss about
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So, let's go back to the system cabinet.
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Let's start from the field again.
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From the junction box, one cable will go
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from here to the marshalling cabinet,
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right? So, this is our marshalling
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cabinet. The cable entered here, the
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trunk cable, and then it is connected to
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surge protection device, and from surge
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protection device, it will connect to
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field bus power hub, and from the field
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bus power hub, the interface cable or
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prefab cable will go from here, and
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again it will go to system cabinet, and
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then it will connect to field bus card,
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Right? So, this is marshalling cabinet.
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So, now let us see the uh system
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cabinet, how this interface cable is
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going. I will show you the picture.
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See, this is the interface cables
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between system cabinet and marshalling
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cabinet. We use these cables to connect
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the marshalling cabinet and the
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I/O modules in the system cabinet. We
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have different types of I/O modules
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Now, let us see the system cabinet. So,
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this is the system cabinet, where
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the I/O modules, communication modules,
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power supply units, CPUs are installed.
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this is my system cabinet. See, these
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are the interface cables coming from the
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marshalling cabinet. Remember, we are
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discussing with Yokogawa CENTUM VP DCS
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So, this is a DCS system of Yokogawa.
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See, these are the interface cables
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coming from the marshalling cabinet,
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right? And then, these cables will
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connect to the respective
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I/O modules. See, these cables connected
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I/O modules. These are the I/O modules.
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We have different types of I/O modules
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available, like Foundation Fieldbus,
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PROFIBUS, analog inputs, analog outputs,
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digital inputs, digital outputs, RTD
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module, thermocouple module,
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communication module, Modbus, etc. So
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The respective module will be installed
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here, and the related cable will be
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connected to the module.
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The cable is coming from the marshalling
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cabinet, and entered into the system
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cabinet, and then connected to the
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respective I/O module, right?
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Now, I will show you the next one.
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A little zoom, see? These are the
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interface cables. See, these are dressed
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like this properly, and then they are
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This is Yokogawa DCS system.
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Now, I will show you the another
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picture. See, here it is very clear.
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These are my cables coming from the
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marshalling cabinet, right?
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And this is the connector. This
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connector is connected to the respective
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These are the modules.
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You can see the type of the module here,
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the label is available.
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This one is FF. The second one,
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it is also FF. See, FF is written here.
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This is FF. FF means Foundation
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1 2 3 4 are Foundation Fieldbus related
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cards. These two are analog input analog
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output, that means this is a 16-channel
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card, eight channel is analog input,
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next eight channels are analog outputs,
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combination of AI and AO.
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This is also same. This is communication
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And these two, the cables are connected
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uh bus one and bus two. These two are
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The processor cards of this FCS. And
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these two are power supply cards.
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So, these are the cards available in the
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And see, the detailed labels are
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mentioned here. The interface cable
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connected to the respective I/O modules.
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These are I/O modules from here to here.
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And these two are communication between
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the nodes. Node means this is one node,
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Let's say you have multiple nodes.
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Node one, node two, node three, node
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So, we have CPUs installed only on node
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one, the first line. See, these two are
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In the next line, there are no CPUs.
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In the next line, there are no CPUs. In
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the next line, there are no CPUs.
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So, the CPUs are only available in the
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first line, that is a node one.
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So that the node two, this is the node
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two, the next one is node two,
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related I/O modules data
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will be transferred from here to the
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node one CPU using these communication
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cards, internal communication cards.
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the node three, node four.
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I'm not going in-depth about these
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things here in this course.
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So, I am restricting the topic now.
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These field bus modules are there,
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these modules act as link act to
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in our network. We have two cables
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coming from the field bus power hub in
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the marshalling cabinet, right? In that
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case, let's say these two are one set.
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This one and this one, these two are one
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Let us say the field bus power hub have
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two cards. The first card is connected
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here, the second card is connected here.
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Like that, the two are
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available next to each other, one left
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In the two cards, only one card will be
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active. The second card is standby.
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You can see here on the top LEDs, uh the
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in the labels are not clear, but I can
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say that in the second card, we have
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three lights, three LEDs. That means
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this second card is in control. This is
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Like that, and these two are one set.
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That means these two are related to one
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And in this, this is left card, this is
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right card. In the left card, all three
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LEDs are on, that means this card is
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active, and the next card is in standby
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Like that, by seeing the LED status, we
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can identify the state.
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Generally, if everything all right, then
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the left card will be the in charge, the
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second card is standby mode.
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If anything happens to the active card
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or communication network
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due to any issue, then the control will
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change from the left to right or right
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Field bus cards will process the data
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and provides this data to the CPUs.
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These are the CPUs, processor units,
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Then the processor units will receive
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the data from the field bus cards,
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and the processor cards then sends the
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data to the operator workstations via
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cables, bus one and bus two.
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These are Vnet type cables or Ethernet
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based cables for communication between
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FCS, I mean controllers, and
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So, this is related to Yokogawa DCS
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These power supply modules provide two
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types of power supplies. One is
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5 V DC, and second one is 24 V DC.
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In normal cases, the 5 V DC is for
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operation of these electronic modules,
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and the 24 V DC is for the field
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But for Foundation Fieldbus, we are
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providing another dedicated power supply
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to the field bus power hubs, right?
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Then the power take from the field bus
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Uh this is FFTDU, fan failure and
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temperature detection unit.
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Uh cabinet related cooling fans will be
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there, right? Yeah, this unit will take
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care of those fans uh providing power
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providing alerts to the users. You can
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also set the temperature. Based on that,
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So, this is about the brief
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discussion about system cabinet
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related to Foundation Fieldbus.
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Remember, the system cabinet will be
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common cabinet where all types of cards
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will be installed. Let's say you have
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Foundation Fieldbus, you have Modbus,
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you have PROFIBUS, or any type of
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communication, then all the cards will
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be installed in this cabinet only.
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So, as per your design, these cards will
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be installed in the respective nodes and
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So, this is all about the system
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cabinet. If you have any questions
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regarding the system cabinet,
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please share with us,
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thank you. Thank you for your support.
