Network Controllers Manual
29
The CM2ND annunciates, via its alphanumeric display, messages for
local alarm, supervisory open and supervisory short conditions. The
CM2ND also displays messages routed to it by a CM1N network
controller and from CM2N(D)s in the regenerative mode. No messages
may be routed from an FCC network to a CM2ND. Multiple messages
are buffered and prioritized, and must be individually acknowledged at
the CM2ND.
The CM2ND is comprised of a control module motherboard, a display
panel, and the following plug in cards:
A. The CPU card which contains the controller microprocessor, system
firmware, RAM and EEPROM memory.
B. The communications card. Options include class A or B RS-485 or
serial loop network data lines. Serial data lines are available in 20
mA loop or fiber optic format. An RS-232 printer/program port is
also provided on each communications card.
C. Option Cards. A selection of system input and output cards is
available in a number of configurations.
The CM2ND circuitry is housed in a protective cover, which contains
the system operating instructions. The CM2ND/RM display mounts in
an RMOF 19" rack mount frame which requires 7" of rack space. All
versions of the CM2ND require one module space for the motherboard.
Application
The CM2NDs provide limited control functions remote from the master
network controller. A variety of network communication formats is
available to meet many applications. The CM2NDs operate in a true
networked fashion, with an integral part of the network program stored
within their memories.
A variety of option cards are available to customize the function of
each CM2ND. Available modules include:
• Network Communications Cards
• Intelligent Analog Sensor and control cards
• Supervised
Cards
• Supervised Audio, Control and Initiating Device Circuits
When using the verified alarm feature, all CM2NDs with verified
points MUST directly supervise a PS4/8B. This is done via the gray
ribbon cable connection between the CM2ND and the power supply.
Note:
When using a CM2ND, zones xx94, xx95, and xx96 for all panel
addresses are used by the CM2ND, and can not be assigned to
addressable devices.
Note:
The PCPU does NOT support message routing. Consequently,
the only routed messages a CM2ND will display installed on an FCC
network come from other CM2N(D)s when in the regenerative mode.
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