Eaton MTL Process Junction Boxes

• Easy to install & maintain

• Standard proven designs reduce

project costs

• Superb corrosion resistance

• Wide choice of cable gland types

• All glanding holes are located in the base of the enclosure

• Generous space for cable terminations

• Strong, high impact resistance, durable

Eaton’s MTL Process JBs are designed for mounting Megablock

fieldbus wiring components, terminators, F30 Ex ic adaptor, 9320

spur connections, surge protection devices and MTL831 Multiplexer

transmitters in order to meet the exacting requirements of process

industry customers.

MTL wiring components are established as the industry standard

for fieldbus device connections and are combined with Crouse-Hinds

junction box and cable glands in the Process JB product range.

Process JBs make it easy to install and maintain the fieldbus system.

For example, a minimum of 75mm (3”) of clearance is provided

for fieldbus cable connections. This ensures that the correct bend

radius is maintained when connecting to the full range of MTL wiring

components.

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.

Finally, decide on gland type. Is the cable armoured? Does the

environment require stainless steel or nickel plated brass glands?

See application example tables and ordering information for details on

how to fully specify the enclosure in your order.

Design features

• Suitable for Zone 2 and Zone 1 intrinsically safe (Ex i) and increased safety applications

• 316 stainless steel enclosure provides superb corrosion resistance

• 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

• Wide choice of cable gland types, with all glanding holes located in the base of the enclosure

• Generous space for cable terminations

• A 10mm earth stud and a breather are 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

Standard materials

• Enclosure: Electrochemically polished 316 Stainless Steel

• Gasket: Silicone