3-4
Series 90™-30 PLC LONWORKS® Bus Interface Module User's Manual
–
June 1997
GFK-1322A
3
Network Installation
During normal operation, the network is the only external connection to the LBIM. The network
is connected to the Module by means of the two-pin removable header on the front panel.
The LBIM adheres to the L
ON
M
ARK
Layers 1—6 Interoperability Guidelines (078-0014-01) for
the interface to the L
ON
W
ORKS
network.
Network Wiring Guidelines
Junction Boxes:
A junction box is required to provide an interface between each L
ON
W
ORKS
application node and
the twisted pair cable. Depending on the topology, pass-through, stub, and local loop junction
boxes can be used. Echelon recommends Weidmüller BLZ (or equivalent) connectors and
receptacles for connections to junction boxes.
Cabling:
The network bus wiring should be 22 AWG (0.36 mm
2
) twisted pair wiring. The LBIM supports
18-24 AWG wiring with connection through a 5.08mm two-position screw terminal block. Either
22 (0.36mm
2)
or 24 AWG (0.22mm
2
) cabling can be used on the stub between the junction box
and the L
ON
W
ORKS
application node. (For an example wiring scheme, refer to Figure 3-3)
Detailed recommendations for network cabling, junction boxes, and connectors can be found in
Junction Box and Wiring Guidelines for Twisted Pair L
ON
W
ORKS
®
Networks (005-0023-01).
Terminating the Network
Network termination is not provided by the LBIM. Termination must be provided by the network
as described in
the LonWorks Transceiver User’s Guide for the transceiver type used or
in the
LONMARK Layers 1-6 Interoperability Guidelines (078-0014-01).
Junction Box
LonWorks
Application Node
22 AWG (0.36mm )
2
22 or 24 AWG (0.22mm )
2
Stub
Network Cabling
Figure 3-3. Cabling for Bus and Loop Networks
Summary of Contents for 90-30 PLC
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