Category: Eaton

The fieldbus standards require that buses must be terminated at

both ends to prevent signal reflections. Usually one terminator is

provided by the power conditioner in the control room. The MTL range

of fieldbus terminators are ideally suited to provide the Terminator that

is normally in a junction box in the field (along with a Megablock for

interconnecting devices). A large “T” is placed on all terminator labels

for easy identification of the Terminator location.

Additionally the F100 and FCS-MBT(-XE) provides some differential

and common-mode (cable shield) over voltage protection.

The Ground connection on the F100 and FCS-MBT(-XE) are used

to shunt any surge currents that may get on the cable shield to a local

ground in the junction box. Under normal operating conditions, the

cable shield remains DC isolated from this local ground. Although the

normal practice is to ground the cable shield in the control room, this

additional ground connection will not cause ground loops. However, in

the event of an overvoltage on the cable shield, a gas discharge tube

in the F100 or FCS-MBT(-XE) fires and shunts this unwanted current

to ground.

Fieldbus Segment Calculator

The Crouse-Hinds series MTL Fieldbus Segment Calculator is intended to

assist network and planning engineers when designing and implementing

FOUNDATION fieldbus ™ H1 networks.

It models the behaviour of user-selectable power supplies and device couplers

and provides a rapid “Go/No-Go” indication of the electrical characteristics of

the fieldbus network.

All the relevant parameters of the fieldbus segment are easily configurable,

including field device currents, cable lengths, cable cross-section and number

of fieldbus spurs. Power supply, device coupler and host control system types

are easily chosen from pull-down menus, or can be user-defined.

The new 3.03 version merges the earlier, separate tools for Fieldbus Barriers

and Megablock Device Couplers, and covers the following device types:

• 9180 Series FF general purpose power supplies

• 910x-22 Series redundant FISCO power supplies

• 9122-IS Series simplex FISCO power Supplies

• F100 Series simplex general purpose power supplies

• F800 Series redundant power supplies

• Custom (user selectable) power supplies

• F300 Series Megablock device couplers (general purpose applications)

• F300 Series Megablock device couplers (Ex ic spur applications)

• F200-IS Series intrinsically safe Megablock device couplers

• F200-XE Series Zone 1 Megablock device couplers

• FCS-MBx-SG ‘classic’ Megablock device couplers

• 937x-FB Series Fieldbus Barriers

Wire Connections to the Power Hub are made using pluggable screw

terminal connectors. Pluggable connectors allow easy connecting,

disconnecting, and moving of devices for reconfiguration, maintenance,

and troubleshooting. Two securing screws on each connector ensure

it stays in place.

To connect a device, cut and strip the +,  –, and shield (S) wires,

insert them into the terminals, and tighten the screw terminals. Plug

the connector into a Device Port or the Auxiliary Port and tighten the

securing screws.

A typical use for the Power Hub is to configure, precommission,

test, or calibrate Fieldbus devices. In this case, the Fieldbus device

and host device (Emerson 375 or 475. National Instruments Fieldbus

interface, etc.) are connected to the Power Hub. No other components

are required to have a functioning Fieldbus segment.

Fieldbus devices can be connected to the Power Hub with shielded

or unshielded twisted pair fieldbus cable. The controller (host), if

present, is considered to be a device.

The Power Hub provides a minimum of 30mA of power-conditioned

current for each Device Port. If the current needs of a fieldbus segment

exceed the capability of a Device Port, the Auxiliary Port can also be

used to provide additional power-conditioned current.

The Power Hub can supply up to 315mA of power-conditioned

current for all Device Ports and the Auxiliary Port. The Power Hub can

be mounted on a 35mm DIN rail. For applications where AC power is

not available, the Power Hub can also be mounted on a battery pack

(accessory FCS-A11) for fieldbus power in the field.

Current limiting SpurGuard™ protection for each Power Hub

Device Port limits the current draw of an attached cable and device and

protects against short circuits. A short circuit in a spur cable or device

will not take down the entire segment. The remaining devices on the

segment continue to operate normally.

Power conditioner with terminators for fieldbus networks

• Built-in fieldbus power conditioning

• 5 fieldbus device ports

• 30mA current per device

• Up to 315mA total current

• Auxiliary port for expansion

• Complete with AC power supply

• Battery-pack option 5 fieldbus device ports

The Relcom Power Hub (F11) is the next generation of the popular

Power Hub. Ideal for bench-tops, labs, demonstrations and test setups,

the Power Hub is a mini fieldbus segment in a box—just add devices.

The Power Hub is a combined bulk power supply, fieldbus power

conditioner, two built-in terminators, five ports for attaching devices

(Device Ports), and an Auxiliary Port for expansion and connection of

additional devices. It functions as a zero length homerun with spurs

(star topology).

The Power Hub is powered by a plug-in wall transformer with an

input voltage range of 100-240VAC (50-60Hz). Adapters are supplied

with the transformer for four different country power outlets (North

America, Europe, UK, and Australia).

Standard materials

• MTL BA-xx4 field mounted versions: IP66 glass reinforced polyester (GRP)

enclosure with a toughened glass window

• MTL BA-xx8 panel mounted versions: Non-metallic enclosure with an IP66 front

instrument panel

Eaton supplies the widest range of Crouse-Hinds series MTL fieldbus displays from

8-variable to cost effective single-variable versions, field and panel mount variants,

safe and hazardous area versions as well as FOUNDATION fieldbus™ H1 and Profibus

PA versions. All versions are bus powered to simplify installation.

The 8-variable BA-x8x model provides a large 86 x 45 mm back-lit display with 9

standard screen options displaying 1 to 4 variables, measurement units and tags

as well as bar graphs. The operator can select the displayed screen via the front

panel push-buttons, or these buttons may be disabled. The instrument can be supplied

with six isolated alarm outputs, each of which may be linked to any of the displayed

fieldbus variables. Alarm setpoints can be entered via the front panel push-buttons,

which in turn may be protected by a security code.

Our cost effective MTL BA-x1x model displays a single fieldbus process variable on a

bold five digit display and a 31 segment analogue bargraph. It supports FOUNDATION

fieldbus™ H1 with an Input Selector fieldbus function block which is supported by most

fieldbus hosts.

Field mounted versions are housed in a robust IP66 glass reinforced polyester (GRP)

enclosure with a toughened glass window that may be surface mounted or pipe mounted

using one of the accessory kits.

Panel mounted versions provide IP66 ingress protection from the front, fitting in a standard

72 x 144mm panel cut out.

Overview

Certifications and compliances

• MTL BA-4xx intrinsically safe versions have ATEX, FM, cFM and IECEx intrinsically

safe certification and comply with the Fieldbus Intrinsically Safe Concept FISCO

For applications in Zone 2 the BA414NDF has ATEX and IECEx Type nL approval

and is FNICO compliant.

• MTL BA-6xx versions are designed for general purpose safe area applications.

Please refer to each version’s datasheet in the resources section for the complete

listing of product certificaitons and compliances

Design features

• FOUNDATION fieldbus™ H1 and Profibus PA versions

• Displays upto 8 fieldbus process variables

• General purpose and intrinsically safe versions

• ATEX Gas & Dust, FM and IEC Ex certifications

• FISCO compliant intrinsically safe version 

The F809F-Plus is available with fully updated versions of eEDDL and FDT/DTM user interfaces

that are free to download from the eaton.com website. Improvements include faster operation

and clearer screen layouts, leading to an enhanced user experience. The user interfaces comply

with NAMUR specification NE107 ‘Self-Monitoring and

Diagnosis of Field Devices’, providing clear standardised diagnostic alerts using three of the four

categories; maintenance required, out of specification, and failure.

Certifications and compliances

EU ATEX:

• Ex II 3 G Ex nA IIC T4 (-40oC=Ta=+70oC)

EU ATEX:

• Ex nA IIC T4 Gc (-40oC=Ta=+70oC)

North America (FM/cFM):

• US: NI/1/2/ABCD T4 (-40oC=Ta=+70oC);  1/2/AEx nA/IIC/T4 (-40oC=Ta=+70oC)

• Canada: NI/I/2/ABCD/T4 (-40oC=Ta=+70oC);  I/2/ExnA/IIC/T4 (-40oC=Ta=+70oC)

Environmental ratings:

• IP rating: IP20 to BS EN 60529 (Additional protection by means of enclosure)

• Operating Temperature: –40°C to +70°C*

• Corrosive atmospheres: Designed to meet ten year service in Class G3 corrosive environment, as defined by ISA Standard SP71.04

* When mounted in a vertical orientation (optimum orientation)

Design features

• Monitors health of 8 fieldbus segments

• Provides early indication of possible network failure

• Communicates over Foundation™ fieldbus H1 segment

• Easily integrates into any fieldbus control system

• Registered to Fieldbus Foundation ITK 6.0. including support for Resource Block diagnostic bits

• Network status and parameters displayed in instrument management software

• Updated EDDL and FDT/DTM user interfaces, with Namur NE107 compatible alarm categories

The Crouse-Hinds series MTL F809F-Plus Fieldbus Diagnostic Module continuously

monitors the performance of eight fieldbus segments, providing information on the

health of the network physical layer. It mounts on a range of MTL power supply

carriers and collects diagnostic information without interruption to normal fieldbus

communications.

As a Foundation Fieldbus™ device the MTL F809F-Plus easily integrates with the

chosen host control system via a fieldbus segment, allowing the network status

and measured parameters to be displayed in the control system’s instrument

management software.

The F809F-Plus builds on the success of the F809F, the industry’s first fieldbus-connected

diagnostic module. New features of the F809F-Plus version include superior immunity

to noise on the ‘communicating’ segment, enhanced short-to-shield detection and

extended power supply voltage measurement range for compatibility with new MTL

power supply types. It may be used as a direct replacement for F809F in existing installations;

when installed using appropriate DD files the full feature set of F809F-Plus become available

with immediate effect.

The F809F-Plus is available with fully updated versions of eEDDL and FDT/DTM user interfaces

that are free to download from the eaton.com website. Improvements include faster operation

and clearer screen layouts, leading to an enhanced user experience. The user interfaces comply

with NAMUR specification NE107 ‘Self-Monitoring and

Diagnosis of Field Devices’, providing clear standardised diagnostic alerts using three of the four

categories; maintenance required, out of specification, and failure.

The F30 is compatible with F304. F308 and F312 Megablock

types, typically providing up to 12 Ex ic spurs per fieldbus

segment. Up to two F30s and their associated Megablocks

may be connected to a single segment, to allow the fieldbus

trunk to be extended between junction boxes in the field.

The spurs are compatible with FISCO and Entity certified

fieldbus instruments. Where FISCO instruments are selected,

cable parameter calculations are not required.

To comply with intrinsic safety requirements, each fieldbus

segment must be powered by a 918x-x2 fieldbus power

supply, fitted with 9192-FP power modules.

Ex ic replaces the earlier Ex nL technique for energy-limited

fieldbus networks, and brings the technique into line with

formal intrinsic safety procedures.

A key benefit of the MTL Ex ic spur solution is that the

fieldbus power supply has a higher output voltage than

competing products, allowing longer trunk cable lengths and

more fieldbus instruments per segment. Requirements for

ensuring compatibility with major host control systems are

also simplified.

The F30 is designed for installation in the field enclosure

together with the Megablock wiring hub. A full range of

compatible stainless steel and glass reinforced polyester

(GRP) enclosures are available.