Communications Protocols
The CG series controllers can communicate using
BACnet MS/TP, N2. or wireless Zigbee®. By default,
these controllers communicate using the BACnet MS/
TP protocol. The BACnet protocol is a standard for ANSI,
ASHRAE, and the International Standards Organization
(ISO) for building controls.
The CG series controllers can be used as functional
replacements for legacy N2 controllers. The N2-capable
MS/TP equipment controller models provide a cost
effective upgrade and modernization path for customers
with existing N2 controllers. For installation and
commissioning support, and tips for efficient and safe
replacement, refer to the Modernization Guide for Legacy
N2 Controllers (LIT-12012005) and the controller-specific
documentation. For information about mapping N2
Objects in controllers with switchable communications
protocols, refer to the N2 Compatibility Options chapter of
the Controller Tool Help (LIT-12011147).
The CGM controllers ship with a default state that can
assist in validating the wiring of the input and output
terminals prior to download of an application file. When
the controller is powered on in this state, the Fault LED
will flash in a pattern of two quick blinks and then a long
pause (see Table 10).
To make use of this feature, ensure the rotary switches
are set to the desired address and wire the input and
output terminals. Apply power to the CGM controller
and connect to the device with either a MAP Gateway
or MS-DIS1710-0 Local Display to view the points in the
controller. The CGM controller will report an Operational
status even though there is no true application loaded.
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