Certifications and compliances

• ATEX: Depends upon model chosen – see specific data sheet in

Resources section of this page

• IECEx: Depends upon model chosen – see specific data sheet in

Resources section of this page

Certification is compatible with:

• Fieldbus Foundation™ FF816-FISCO.

• IEC 60079-27 FISCO Standard

• EC Directive 94/9/EC

Environmental ratings:

• Operating temperature: –20°C to +60°C

• Ingress protection:  IP20 to BS EN 60529 (Additional protection can

be achieved by means of the enclosure)

Design features

• Redundant power supply configuration for high system availability

• 4 segments

• Enhancement of field-proven 912x-IS FISCO power supply

• For IIB Gas Groups

• Variants for direct integration into proprietary fieldbus control systems

• Rugged construction for easy cabinet mounting and resistance to shock

and vibration

Crouse-Hinds series MTL 910x FISCO power supply systems provide an

intrinsically safe field network for Foundation™ fieldbus systems in

hazardous areas. Variants are available for integration into proprietary

fieldbus control systems. The output of the power supply modules

complies with the Fieldbus Intrinsically Safe Concept (FISCO) model,

in accordance with IEC standard 60079-27. 

The key advantages of FISCO over earlier ‘Entity’ model installations

to FF-816 are higher available field current and reduced safety

documentation, while retaining the ability to conduct maintenance

while energized and without “gas clearance”.

The 910x systems build on MTL 912x-IS range of power supplies,

which have become established as the industry standard solution for

FISCO networks. The 910x systems now achieve higher levels of overall

system availability by providing redundancy of the power modules.

Fieldbus standards require buses to be terminated at both ends to prevent

signal reflections. In many applications, one terminator is built into the

power conditioner, which is usually located near the control system.

The second terminator is either integrated into the Megablock or fieldbus

barrier wiring component, or added in the form of a separate DIN-rail

mounted unit.

The Crouse-Hinds series MTL range of fieldbus terminators are ideally suited

to provide the terminator that is normally installed 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.

Design features

• Terminators are clearly marked with a large ‘T’ making them easy to identify in the field

• Provides some differential and common-mode (cable shield) over voltage protection

• The ground connection on the filedbus terminators are used to shunt any surge currents

that may get on the cable shield to a local ground in the junction box.

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

ground connection will not cause ground loops.

• In the event of an overvoltage on the cable shield, a gas discharge tube fires and shunts

this unwanted current to ground

Certifications and compliances

FCS-MBT Model:

• Ex II 1 G EEx ia IIC T4

• Ex II 3 G Ex nA IIC T4 Gc

• Class I, Division 1. Groups A, B, C and D, (Temp Code T4) Ex ia IIC T4

• IS/I/1/ABCD/T4 Ta=70ºC

• I/0/AEx ia IIC T4 Ta=70ºC

• NI/I/2/ABCD/T4 Ta=70ºC

• I / 2 / IIC / T4 Ta=70ºC

F100 Model:

• Ex II 3 G

• Ex nA IIC T4 Gc

• Class I, Division 2. Groups A, B, C and D (Temp Code T4); Ex nA IIC T4

• NI/I/2/ABCD/T4 Ta=70ºC

• I / 2 / IIC / T4 Ta=70ºC

FCS-MBT-XE Model:

• Ex II 2 G Ex eb mb IIC T4 Gb

• Ex eb mb IIC T4 Gb

Environmental ratings (all models):

• Operating Temperature: –45ºC to +70ºC

The Crouse-Hinds series MTL F11 is the next generation of the

popular power hub. Ideal for fieldbus device or system

demonstrations, bench-top calibrations and test setups.

The power hub is a mini fieldbus segment in a box – just add

devices.

A typical use for the power hub is to configure, precommission,

test or calibrate Fieldbus devices.

Design features

• 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

Standard materials

• Case: Lexan polycarbonate

Crouse-Hinds series MTL F30 Ex ic Adaptor is an accessory to our

F300 range of Megablock wiring hubs. The F30 provides intrinsically

safe Ex ic spur connections for fieldbus networks in Zone 2 hazardous

areas. One F30 is used with each Megablock, to limit the voltage at

the spurs to Ex ic levels. When connected to suitably certified fieldbus

instruments, the spurs may be live-worked in accordance with normal

intrinsic safety procedures. The F30 is completely transparent to all

fieldbus communications.

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.

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

networks, and brings the technique into line with formal intrinsic safety

procedures.

Certifications and compliances

• Hazardous Area Approvals:

• Certification code: II 3G Ex nA IIC T4 Gc

• Certification numbers: DEKRA ATEX 0129X; IECEx DEK 13.0038X

• Environmental ratings:

• Operating temperature range: –40º to +70ºC

• Relative humidity: 0 to 95% non-condensing

Design features

• Simple compliance with Ex ic certification requirements from control

room to field

• Use with F300 range of Megablocks and 918x-x2 range of fieldbus

power supplies to provide Ex ic intrinsically safe spurs for FOUNDATIONTM

Fieldbus networks

• Architecture supports Ex nA, Ex d devices and Ex i devices on the same

segment

• Allows spurs to be live-worked in Zone 2 when connected to suitably

certified field instruments

• Compatible with FISCO and Entity certified fieldbus devices

• Installs with Megablock in field junction box

• Supports long trunk cable lengths and heavily loaded fieldbus segments

Standard materials

• Case: Polycarbonate

Crouse-Hinds series MTL F30 Ex ic Adaptor is an accessory to our

F300 range of Megablock wiring hubs. The F30 provides intrinsically

safe Ex ic spur connections for fieldbus networks in Zone 2 hazardous

areas. One F30 is used with each Megablock, to limit the voltage at

the spurs to Ex ic levels. When connected to suitably certified fieldbus

instruments, the spurs may be live-worked in accordance with normal

intrinsic safety procedures. The F30 is completely transparent to all

fieldbus communications.

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.

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

networks, and brings the technique into line with formal intrinsic safety

procedures.

The FCS-9000 range of enclosures are manufactured from polished

316 stainless steel to provide the highest levels of corrosion

resistance for the harshest process environments.

The FCS-96xx Process JBs are suitable for Zone 2 and Zone 1

intrinsically safe (Ex i) and increased safety applications.

The fieldbus junction boxes are available pre-drilled for one

segment: having trunk-in, trunk-out and 4 spur connections; or a

trunk-in and 8 or 12 spur connections; or two segments having a

trunk-in and 24 spur connections. Two-pair multicore trunk cable

may be used when only a single trunk gland is available.

For temperature multiplexer applications, junction boxes are

available for a single MTL831C with a data highway in and 16

sensor connections and for 2 MTL831C units with a data highway

in and 32 sensor connections.

The wide choice of glands, including stainless steel and nickel

plated brass, enables a high quality seal with standard or wire

armoured cables.

The box incorporates a rain channel that prevents standing water

from damaging the one-piece seal; diverting it away from the

contents when the door is opened. A 10mm earth stud and a

breather are also included as standard.

An adhesive backed, Traffolyte tag label is supplied loose or can be

engraved with the tag number and fitted, if details are supplied

when ordering.

The FCS-9000 series that provide strength, durability and corrosion

resistance to many chemicals and their vapours. The enclosures are

manufactured from 316 stainless steel to provide the highest level of

corrosion protection.

A wide choice of glands is available, ready fitted to the junction box:

stainless steel and nickel-plated brass enabling a high quality seal with

standard or wire-armoured cables. All glanding is in the base of the

enclosure with a minimum of 75mm of clearance between the base of

the enclosure and other components. This makes glanding much easier,

especially when terminating armoured cable.

Significant cost savings can be made on a fieldbus project by selecting

standard, and proven, fieldbus junction box designs. It eliminates the

need for custom designs when choosing junction boxes for fieldbus

applications and saves the cost of managing the specification and the

eventual procurement of the junction boxes.

To select the Process JB appropriate to your application; first

determine the number of fieldbus device connections, and hence the

number of spur connections required in the junction box. This will

also define which Megablocks (and maybe terminators) are required.

Use the application examples to help you. For MTL831C applications,

the enclosure choice will depend on the number of transmitters

(maximum 2 x MTL831C) to be fitted inside the enclosure.

Identify any additional items that will need to be housed in the

enclosure, e.g. terminals for terminating spare cables, Ex ic adaptor,

additional terminators, etc. Calculate how much DIN rail they will

require. Add this to length of the Megablock(s) and choose an

enclosure with sufficient rail length.