Control Modules—Network Control Module 200 Series 7
Local Bus: N2
The N2 Bus communications are also provided by a built-in interface
(Item 6 in Figure 1). Devices on the N2 Bus constitute a local network,
controlled by the NCM. The NCM polls the devices according to a
user-set priority level, which is set at each device’s definition window.
The N2 connects in a daisy chain fashion, and provides the transmission
medium for modules installed within the base frame (e.g., a Digital
Control Module or Point Multiplex Module), as well as the external
devices (application specific controllers--including the IFC-1010/2020
Intelligent Fire Controller and IAC-600 Intelligent Access Controller).
External devices connect to the N2 interface via the Terminal
Communications Board (TBC) (Item 7 in Figure 1).
An NCM200 can accept both N2 and L2 communications at the same time
when using the Standard NCM software (not fire management, intelligent
access, or OT software).
Note: Starting with Metasys Release 6.0, a second N2 Bus can be added
using an N2 submodule connected to the NCM’s Communication
Submodule slot (Item 8 in Figure 1). For complete information,
see the Dual N2 Bus Application Note (LIT-6363145).
Local Bus: L2
The optional L2 Bus is dedicated to connecting C210A and C260A ASCs
on a local, external trunk, controlled by the NCM. L2 communications are
enabled by installing an L2 submodule in the NCM’s Communication
Submodule slot (Item 8 in Figure 1).
The L2 Bus connects in a daisy chain fashion. As is the case with the
N2 Bus, connections from the external lines to the NCM are made at the
Communications Terminal Board. The devices on it are polled with equal
priority.
An NCM200 can accept both N2 and L2 communications at the same time
when using the Standard NCM software (not fire management, intelligent
access, or OT software).
Submodules
Submodule slots (Items 8 and 10 in Figure 1) on the NCM allow users to
plug in submodules to add or change functions to the system.
The Network Identity Module slot (Item 9 in Figure 1) is reserved for
NIMs to configure the NCM200. An NIM module must be installed for
the NCM200 to operate.
The Battery Submodule slot (Item 10 in Figure 1) is reserved for the
battery submodule, which allows the NCM to retain code and data base
memory for up to 72 hours in event of a power failure.
