WattMaster WM-WCC3-TGD-01B - Manual (Page 613)

13B. WCC III - MCD2 INSTALLATION GUIDE
WCC III Technical Guide 13B-1
SECTION 13B: WCC III - MCD2
INSTALLATION GUIDE
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WCC III - MCD2 History Information
The WCCIII-MCD2 (WM part # OE405-02) was designed as
a product improvement of the older WCCIII-MCD (WM part #
OE405-01) and as such is a drop-in replacement unit for the older
WCC III-MCD computer product (WM Part # OE405-01). The
original WCCIII-MCD was designed as a product improvement
upgrade for the old WCCII type computer.
The heart of the WCCIII-MCD2 is an industrial-rated single board
computer that is within a custom-designed wrap-around sheet
metal computer enclosure that matches the look of the satellite type
3 controllers, and this makes the new WCCIII-MCD2 about one
quarter the size of the previous WCCIII-MCD. It has completely
quiet operation due to the fact that the new WCCIII-MCD2 is
completely fanless due to far less power requirements of the newer
generation of Intel
TM processors.
There are no physical moving parts within the WCCIII-MCD2.
WattMaster uses the start up and shut down operational control
of this new WCCIII-MCD2 design with the addition of a 4 line
by 20 character CrystalFontz LCD controller board. In addition,
WattMaster Controls has developed an additional circuit board
called the MCOMM board, which is a PIC32 based 4 channel –
Isolated RS-485 communication packetizer and unpacketizer for
the WCC III satellite type of communications loop.
The WCCIII-MCD2 will communicate to up to 240 of the
WattMaster Controls SAT 3 series of fi eld programmable
controllers. Also, a very specialized, small and compact power
supply module was designed to supply +12VDC @ 4 Amps
power to the MCOMM board, PCM-9362N CPU board, and the
CrystalFontz LCD controller, and this power supply module is
called “LTM8027 Power Supply Module”.
The WCCIII-MCD2 is powered off of a single 24VAC @50VA
transformer (WM part # WP000050) – that is supplied with the
WCCIII-MCD2.
Also the new WCCIII-MCD2 uses a lot less separate individual
components in its construction than the old WCCIII-MCD
computer.
The old WCCIII-MCD used 7 separate cable assemblies to
interconnect the various circuit boards with in the WCCIII-MCD
case to each other. The new WCCIII-MCD2 uses a single cable
assembly called “SBC INTERNAL I/O CABLE” (WM part #
HZ00160) to interconnect the various circuit boards together.
There used to be a separate circuit board on the old WCCIII-MCD
that was used to control the power startup/shut down functions. On
the new WCCIII-MCD2, these power start up/shut down functions
are now handled by the CrystalFontz LCD controller. There was
also a passive backplane board on the old WCCIII-MCD, and this
was eliminated on the WCCIII-MCD2 design. The old WCCIII-
MCD case used 17 separate pieces of steel sheet metal in its
design, whereas the new WCCIII-MCD2 has two simple pieces of
lightweight aluminum for its case design.
System Requirements