EATON MC2-442-57CQB-1-2A Molded Case Circuit Breaker (MCCB)

Simple and reliable interconnection

Each Megablock has dedicated connections for the fieldbus “home run” or trunk

cable. Trunk connections are identified by their black connectors. Numbered

(grey) connectors are provided for each spur.

Wiring connections to the Megablock are made using pluggable connectors

(screw terminal type are standard, but other connection styles are available).

These allow wire terminations to be made to the individual connectors, which are

then plugged into the Megablock.  Devices can be connected and disconnected

easily during commissioning. On completion, the connector retaining screws are

tightened to secure each connector to the Megablock

MECHANICAL

Mounting orientation

Megablocks mount vertically or horizontally on 35mm DIN rail within a field junction

box  The use of DIN rail end stops are recommended to prevent sliding (especially for

vertical installations).

Eight, and twelve port Megablocks have areas on their body for labelling so that

segments can be easily identified according to plant standards.

Enclosure requirements

General requirements

Megablocks may be mounted in hazardous (classified) areas – see section 8.  The

following conditions must also be satisfied to ensure safe and reliable operation.

a) Prevent any form of pollution that could compromise the operation of the unit.

For example, choose an unpolluted location or a suitable enclosure to protect the

assembly.

b) Provide an adequate level of mechanical protection. This can be achieved by

selecting a protected location, a suitable enclosure, or a combination of both.

c) Ensure that all cable entries and connections are secure by making provision for

the careful routing and securing of all cables