MTL Megablock Passive MTL Fieldbus Networks F271-XE

MTL Megablock Passive MTL Fieldbus Networks F271-XE

MTL Megablock Passive MTL Fieldbus Networks F271-XE

MTL Megablock Passive MTL Fieldbus Networks F271-XE

Description

Passive hubs for zone 1 & division 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 individualdevices 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. Megablocks are 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. 

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, screwterminal 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. 

MTL Megablock Passive MTL Fieldbus Networks F271-XE

Specification 

Mounting requirements 

35mm DIN rail 

Wire capacity 

0.14 to 2.5mm2 

Recommended screwdriver torque setting: 0.5-0.6Nm 

Case material 

Lexan polycarbonate 

Temperature range 

Operating –45º to +70ºC 

Storage –50º to +85ºC 

Relative humidity 0 to 90%, non-condensing 

Voltage required to activate power LED 

9.2V dc minimum 

Minimum input voltage 

10.0V (See Note 1 below) 

Maximum input voltage 

see certification ratings 

Maximum input current 

see certification ratings 

Trunk-to-trunk voltage drop 

0.1V maximum

MTL Megablock Passive MTL Fieldbus Networks F271-XE

Odering information

MTL Megablock Passive MTL Fieldbus Networks F271-XE

Code information

F241 

F245 F245-XE 

F247 F247-XE

F251 F251-XE

F253 F253-XE

F259 F259-XE

F261

F271 F271-XE