Network Control Module 300 Series Technical Bulletin 82
Making the N1 LAN Connection
Follow the steps below to connect the Fire-Net NCM to the N1 LAN.
1. Install a T-connector into the port of the Fire-Net NCM N1 LAN
ARCNET board.
2. Connect the N1 LAN cable to one end of the T-connector. If the
NCM is at the end of line, connect a 93-ohm terminator cap to the
other end of the T-connector. If the Fire-Net NCM is not at the
end of line, connect the other segment of N1 LAN cable (that goes
to the next N1 node) to the T-connector.
Refer to Figure 7 in the NCM Cable Guidelines, NCM N1 LAN
Connection section of this document. If you have not set the Fire-Net
NCM node number, see the Interface Boards, Installing the MIB-OWS
Board section of this appendix for details.
Making the MIFN Connection: Copper Wire
If you have not already installed the MIB-OWS board, see the
Interface Boards, Installing the MIB-OWS Board section in this
appendix to install it now. Once the board is installed, follow the steps
below.
To make the MIFN connection using copper wire:
1. Install each end of the twisted pair wire into the terminal block of
the MIB-OWS board, starting at the far left (Figure 28 and
Figure 29).
Note: If the Fire-Net NCM is at the end of line, use the first
two terminals from the left. If the Fire-Net NCM is not at the end of
line, connect the twisted pair that goes to the next MIFN node into the
next two terminals.
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