Category: Eaton

Design features

• A green power LED on each unit indicates whether at least 9V dc is present.

• Available in two, four, eight, ten and twelve drop versions

• Multiple Megablocks are easily wired to one another to allow larger segments to be constructed

• Choice of rising cage-clamp screw terminal or spring clamp type connections simplifies commissioning

and maintenance

• Available with built-in SpurGuard™ protectors that prevent a short circuit in any of the individual

transmitters or spur

• cable runs from bringing the entire fieldbus segment down

• A red LED near each spur connection indicates that a spur is shorted and is in “over-current” mode

Standard materials

• Housing:  Polycarbonate

Eaton BA488CF-F Fieldbus intrinsically safe display,panel mounting

Eaton BA488CF-P Fieldbus intrinsically safe display,panel mounting

Eaton BA618CF-F Fieldbus display, panel mounting

Eaton BA688CF-F Fieldbus safe area display, panel mounting

Eaton BA688CF-P Fieldbus safe area display, panel mounting

Eaton F11 Fieldbus Power Hub

Eaton F11-Labkit Fieldbus F11 Power Hub and cables

Eaton F11-YK2 Fieldbus F11 Power Hub with fieldbus cables

Eaton FCS-A11 Battery Pack (Power Hub power in the field)

Eaton F100 General purpose Zone 2/Division 2 terminator

Eaton FCS-MBT Intrinsically safe Zone 0/Division 1 terminator

Eaton FCS-MBT-XE Ex me Zone 1 terminator

Eaton FBT-5 Fieldbus wiring validator

Eaton FBT-6  Fieldbus Monitor for FOUNDATION fieldbus™ H1

Eaton FBT-6-PA  Fieldbus Monitor for Profibus PA

Eaton FP32 Fieldbus trunk and spur surge protection

Eaton FS32 Fieldbus trunk and spur surge protection device

Crouse-Hinds series MTL Megablock™ is a DIN-rail mounted passive hub

designed for use in FOUNDATION™ fieldbus H1 and Profibus PA networks.

Megablocks minimize hand wiring and allow individual devices to be added

to and removed from the segment without disrupting network communication.

The SpurGuard™ option provides short circuit protection for the segment.

Hazardous area approvals permit installation in a variety of configurations in

Zone 1 or 2 and Division 1 or 2. Within Zone 2 or Division 2. Megablocks may

be installed as part of non-sparking (non-arcing) or energy-limited (non-incendive) circuits.

• F2xx-IS models: Intrinsically Safe Megablocks for Zone 1 applications

• F2xx-XE models: Megablocks for Zone/Div 1 applications

• F300 models: Megablocks for Safe Area and Zone/Div 2 applications

Certifications and compliances

• For a complete listing of certification and approvals across our MTL Megablock range,

download the product datasheets in the resources section of this family page.

INSTALLATION

Megablocks can be mounted vertically or horizontally using 35

mm DIN rail within a suitable enclosure, such as a field junction

box. Megablocks are removed from the DIN rail using a flat blade

screwdriver to release the mounting platform. Use of DIN rail end

stops is recommended to prevent sliding in vertical installations. The

four, eight, ten and twelve port Megablocks have labeling areas so

that segments can be easily identified according to plant standards.

MTL have a wide range of standard junction box designs for use with

Megablocks. See the data sheet for the range of Process JBs.

Shown above is an example of a common Fieldbus segment topology.

Twelve field devices are connected to a twelve-drop Megablock,

which is mounted in a field junction box. The trunk connector on

the Megablock is wired to the segment trunk cable that leads to the

control room or marshalling panel where the power supply and second

terminator are located. The example shows the

increased safety (Ex em) version connected to a general purpose

fieldbus power supply.

GROUNDING

To prevent ground loops, a fieldbus segment should only be grounded

at one point. This is usually done by grounding the cable shield at the

control room end of the segment. If a permanent segment ground

connection in the field is desired, this can be achieved by wiring

the shield terminal on one of the Megablock trunk connectors to a

suitable earth ground instead of wiring it to the shield terminal on the

Megablock Terminator.

Fieldbus Connection System (FCS) wiring blocks are protected by U.S.

Patents 6.366.437. 6.369.997 and 6.519.125.

SpurGuard™ is a device-port, short circuit protection technique

that minimizes susceptibility to single points of failure. The

Megablocks come with built-in SpurGuard™ protectors that prevent

a short circuit in any of the individual transmitters or spur cable runs

from bringing the entire fieldbus segment down. A red LED near

each spur connection indicates that a spur is shorted and is in “over

current” mode.

For applications using flameproof certified devices, the F2xx-XE

Megablocks are designed to meet the requirements for increased

safety for installation in an Ex e junction box in Zone 1. See the F300

Series Megablock datasheet for applications in safe areas, Zone 2

and Division 2 hazardous areas.

To select the Megablock for your application see the Ordering

Information section of this document.

Passive Hubs for Zone 1 Fieldbus Networks

Megablocks are DIN-rail mounted passive hubs for Foundation™

fieldbus networks. They connect several field devices to the network

trunk cable and provide short circuit protection to the segment.

Megablocks minimize hand wiring and allow individual devices to be

added to and removed from the segment without disrupting network

communication.

A green power LED on each unit indicates whether at least 9V dc

is present. F2xx-XE Megablocks are available in four, eight, ten and

twelve drop versions. Multiple Megablocks are easily wired to one

another to allow larger segments to be constructed.

Megablocks are available with an integral terminator making

them ideal for a star or “chickenfoot” topology where several devices

are connected at a single field junction box. Separate Megablock

Terminators are also available, whch may be wired easily to any

Megablock. Megablocks having a built-in terminator are clearly

marked (‘T’) for easy identification by field personnel.

Connections to the Megablock are made using pluggable, screw

terminal type connectors. This allows wire terminations to be

made to the individual connectors which are then plugged into the

Megablock. Devices can then be connected and disconnected easily

during commissioning. After commissioning, retaining screws are

tightened to secure each connector to the Megablock.

Trunk connections for the fieldbus home-run/ trunk cable are easily

identified by their black connectors. Separate numbered connections

are provided for each spur drop.

Crouse-Hinds series MTL fieldbus barriers provide intrinsically safe spur

connections from a high-energy trunk, enabling reliable connection to

certified Foundation™ fieldbus H1 instruments.

These fieldbus barriers are engineered for hazardous areas, ensuring

safety and performance in process automation environments.

Our intrinsically safe fieldbus barriers are available in a variety of

configurations and materials, maximizing application flexibility for industrial

control systems.

• 9373-FB3 range: Complete enclosure systems for 12 intrinsically

safe spur connections

• 9377-FB3 range: Compact fieldbus barrier module for 12 intrinsically

safe spur connections

• 937x-FB2 range: Complete enclosure system for 6 or 12 intrinsically

safe spur connections

• 9372-FB range: Redundant fieldbus barrier enclosure for up to 6

intrinsically safe spur connections

• 9387-FB range: Open frame, redundant fieldbus barrier with pre-assembled

system components for up to 5 intrinsically safe spur connections

Open frame versions are designed for installation into user-selected field enclosures.

These are suitable for applications requiring special enclosure features such as

viewing windows, removable gland plates, or where multiple Fieldbus Barrier

segments are required in a single enclosure. Each unit comprises pre-wired and

assembled modular components on a stainless steel baseplate, for installation

into an Ex e certified field enclosure without the need for additional internal

wiring or ancillary components.

Design features

FS32:

• Protects intrinsically safe spurs on MTL 937x-FB range fieldbus

• 20kA maximum surge current per line

• Plug connectors for quick and easy connection or rewiring

• Meets the requirements of IEC61158-2:2004

• Can be used on MTL Megablocks or other fieldbus equipment

• 10 year product warranty

FS32-XE:

• Protects Zone 1 trunk on 937x-FB3 MTL compact fieldbus barrier

• 20kA Total surge current

• Plug connectors for quick and easy connection or rewiring

• Compatible to Foundation™ fieldbus requirements of IEC61158-2:2014 and IEC6143-21

• Protects trunk and spurs of F200-XE Megablock wiring hubs

• 10 year product warranty

The FS32 surge protection device is designed for general purpose,

intrinsically safe and Ex ec Zone 2 applications. The FS32 fits our latest

fieldbus products the 9180 range of fieldbus power supplies, F300 and

F200-IS range of Megablock device couplers and the intrinsically safe

spurs of our fieldbus barrier wiring hubs.

For applications requiring Ex eb certification, the FS32-XE provides surge

protection for trunk and /or spur connections on a F200-XE MTL Megablock

device coupler as well as trunk surge protection on on a 937x-FB3 MTL

compact fieldbus barrier. These fieldbus components must be installed

in an Ex e certified field enclosure for mounting in an IEC Zone 1

hazardous area.

Design features

FS32:

• Protects intrinsically safe spurs on MTL 937x-FB range fieldbus

• 20kA maximum surge current per line

• Plug connectors for quick and easy connection or rewiring

• Meets the requirements of IEC61158-2:2004

• Can be used on MTL Megablocks or other fieldbus equipment

• 10 year product warranty

FS32-XE:

• Protects Zone 1 trunk on 937x-FB3 MTL compact fieldbus barrier

• 20kA Total surge current

• Plug connectors for quick and easy connection or rewiring

• Compatible to Foundation™ fieldbus requirements of IEC61158-2:2014 and IEC6143-21

• Protects trunk and spurs of F200-XE Megablock wiring hubs

• 10 year product warranty

The Crouse-Hinds series MTL FS32 family of surge protection devices

prevent surges and transient over-voltages conducted along the Trunk

or Spurs of fieldbus systems from damaging the associated electronics

such as power supplies, device couplers, fieldbus barriers, terminators,

and the bus control equipment. There is no additional wiring required

to add a surge protector to a fieldbus trunk or spur, simply unplug the

connector, plug in the FS32 surge protector to the device, tighten the

screw on the earth bar and plug the connector into the FS32.

This delivers significant installation cost savings and makes adding a

surge protector to an existing installation very simple.

The FS32 space saving design helps to reduce the size of junction

boxes and ease installation. In operation, the FS32 does not adversely

affect the performance or operation of the fieldbus or connected equipment.

 It allows signals to pass with little attenuation while diverting surge

currents safely to earth (ground) and clamping output voltages to safe

levels.

• Protects intrinsically safe spurs on MTL 937x-FB range fieldbus

• 20kA maximum surge current per line

• Plug connectors for quick and easy connection or rewiring

• Meets the requirements of IEC61158-2:2004

• Can be used on MTL Megablocks or other fieldbus equipment

• 10 year product warranty

The FS32 represents the next generation of surge protection to be

fitted on Foundation™ fieldbus Systems. The space saving form factor

allows the FS32 to be connected directly to the terminal receptacle on

the module carrier of the 9370 fieldbus barrier. The earth (ground) is

connected through the mounting screw in one simple operation. The

field spur cable termination block plugs directly into the FS32 allowing

fast and effective retro fitting if desired with no additional hardware

being required.