Power Open Processor/Open Processor and a
termination block for termination of field wiring
or tubing.
Figure 3. Two sizes of enclosure assemblies.
Enclosure Assembly
The enclosure assembly includes a backplane, rails
to which the Power Open Processor or Open
Processor, Power Module, and Point Termination
Modules snap on, a duplex receptacle and a step-
down isolation transformer.
The enclosure assembly houses both electronic and
pneumatic components. The enclosure is available in
the following two sizes to allow the enclosure size
to match the point density of the application:
• 24 module size
• 40 module size
The enclosure is constructed of metal to
accommodate secure conduit fittings and protect
components against electrical transients.
The removable front door has see-through view
panels to allow the user to see the status of inputs,
outputs and override switches. The door is UL 94-
5VA rated for fire and smoke control applications.
Enclosure assemblies allow space for easy wire
terminations. Two unswitched 115 Vac outlets are
included in each enclosure to power accessory
devices such as modems and portable operator’s
terminals.
The NEMA 12 MBC-24 and MBC-40 UL listed panel
assemblies provide control in areas requiring air-tight
protection against lint, dust, dirt, water seepage and
dripping and external condensation of non-corrosive
liquids.
Power Module
The Power Module provides regulated power to the
Point Termination Modules and active sensors. Only
one Power Module is needed per enclosure
assembly, simplifying installation and
troubleshooting.
An on-board microprocessor controls its operation
and works with the Power Open Processor or Open
Processor to ensure smooth power up and down
sequences of equipment controlled by the point
modules, even through brown-out conditions.
The Power Module contains status LEDs to indicate
24 Vac supplied from the line power supply, 24 Vdc
supplied to point modules and over voltage/under
voltage condition.
Open Processors
The Open Processor is a microprocessor-based
multitasking platform for program execution and
communications with other field panels, FLN
devices, point modules and third-party
equipment/systems (optional). The Open Processor
scans field data, optimizes control parameters and
manages operator requests for data in seconds.
The Open Processor is an open communications
platform providing control of an extensive number of
building systems including:
• Siemens Building Technologies, Inc. FLN. Each
Open Processor supports up to 3 trunks for a
total of 96 application specific control devices.
• Communications drivers to non-Siemens
networks. As an option, an Open Processor can
communicate to related building system
controllers such as boilers, chillers, rooftop
units, PLCs, power meters, lighting panels, fire
alarm and life safety systems and access control
systems.
Multiple Open Processors can co-exist in a single
enclosure, providing flexibility in configuration and
architecture. Up to 480 FLN devices can be
supervised from one MBC with five Open
Processors installed.
Two RS-232 operator terminal ports with quick
connect phone jacks are included with each Open
Processor for operator devices such as a simple CRT
terminal, laptop PC, printer or modem.
Siemens Building Technologies, Inc. Page 3 of 9
(108 páginas)
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