BASEPLATE IMPLEMENTATION

A grouping of up to four baseplates per FCM (pair)

can be connected together, for mounting of up to 32

modules (30FBMs and 2 FCMs). Multiple groups of

baseplates can be connected to the Ethernet trunk

Fieldbus, either directly (via Ethernet connectors) or

through one or more multiport fiber optic converters

(hubs). (Refer to PSS 21H-2W1 B3 for information on

the various DIN rail mounted FBM subsystem

communication topologies). Module Fieldbus

interconnection between baseplates is made by

shielded twisted-pair cable for local configurations

and/or by fiber optic cable for remote configurations.

Using fiber optic topologies (refer to

PSS21H-2W1B3), baseplates can be separated up

to 10 km (6.2 mi).

Figure 1 shows baseplate implementation using only

shielded twisted-pair cable connections. This

configuration is used when the four (maximum)

baseplates are mounted in the same general location.

Using shielded twisted-pair cable, the baseplates can

be interconnected up to 60 m (196 ft) total cable

distance. Shielded twisted-pair cables are available in

lengths of 0.25 m (10 in), 1 m (3.3 ft), 3 m (9.9 ft), 5 m

(16.5 ft), 10 m (33 ft), 20 m (66 ft), 30 m (99 ft) and

60m (198 ft), allowing placement of the baseplates

(up to four in a group) in one or more enclosures.