Power Supply Loading In Lcne2 Host Node - Honeywell LC13-510 Manual

2.11 POWER SUPPLY LOADING IN LCNE/LCNE2 HOST NODE
The LCN may be extended with one or more Fiber Optic Links. An otherwise empty node
of a Dual Node Module may be used to host the LCNE/LCNE2 fiber optic transmit/receive
boards. However, the LCNE/LCNE2 boards alone do not provide adequate load on the
power supply to ensure that it will perform to specifications. A version of the KJMP board
(51401594-200) with power supply loading resistors is used in this situation. Table 2-4
illustrates this configuration. The table indicates that more than one LCNE/LCNE2 could
be installed in a node. While this is physically possible, system convention is to place the
LCNE/LCNE2s on separate power supplies to prevent the loss of both Cable A and Cable
B at the remote segment of the LCN if a power supply fails. If both nodes of a Dual Node
Module are empty, each node could be used to host one of the two required
LCNE/LCNE2s, because each node has a separate power supply.
The LCNE2 board is a later revision of the LCNE board. They are functionally equivalent and
your system may include either or both types.
Table 2-4— LCNE/LCNE2 Host Nodes
Lower Node
Slot Front
3
2 KJMP
1
Note: May be LCNE/LCNE2, FOC/XMTR, FOC/RCVR or empty.
Do not place a CS/R board in I/O Slot 1 of either node or serious damage can result.
Dual Node Module Service
NOTE
Rear
Note
Note
LCNE/LCNE2
CAUTION
2-26
Upper Node
Slot Front
2 KJMP
1 LCNE/LCNE2
2.11
Rear
Note
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