WattMaster WCC III part 12 - Manual (Page 20)

WCC III Technical Guide 12-18
12. WCC III INSTALLATION
C 1 to C 8 Connections
The eight “C” connection points of the SAT III controller were
originally classifi ed and labeled as “COOL” contacts starting with
the SAT 0, SAT I, and SAT II controllers. They do not need to
be used only for “COOL” contacts, as these contacts are general
purpose relay outputs. There is a load protection device called
a varistor across each of the eight “COOL” output connections
that limits the allowable voltage to no more than 32 volts AC\DC
maximum at 1 amp current draw for each contact. Attempting to
switch any voltage greater than 32 Volts, or current draws of more
than 1 amp per contact could and will result in damage to the SAT
III controller. These “H” and “C” contact outputs are meant to
control tri-state actuators, contactors, relays, solenoids, and the PI
board AKA “ECC II ANALOG OUTPUT” board that WattMaster
Controls used to manufacture. See Figure 12-18 for further wiring
details. See Section 3 for additional programming instructions.
Binary Inputs
The SAT III controller has two sets of eight-position dipswitches
on its front panel labeled L1 - L8 and L9 - L16. Switches L1-L8 are
housed together in one dipswitch, and switches L9-L16 are housed
together in another dipswitch. For the old connection method one
dipswitch is removed for each Binary Input with Time Delay board,
and is then replaced with a ribbon cable which connects the Binary
Input with Time Delay board to the SAT III controller. The binary
devices to be monitored are then wired to the terminal strip of the
Binary Input with Time Delay board. The Binary Input with Time
Delay board requires a 24-VAC power source. Warning you must
observe polarity on the 24-VAC and GND connections of both the
Binary Input with Time Delay board and the SAT III controller,
as the grounds must be the same. Or, an alternative connection
method to the SAT III controller is now provided by the 6-pin HSS
expansion port on the side of the SAT III controller. See Figures
12-26, 12-27, & 12-28 for further wiring details.
24VAC & GND Connection
Located on the bottom side of the SAT III controller is a 24 VAC
and GND connection. This is the main power connection to the
SAT III controller. Each SAT III Controller draws - 15VA. External
relays and contactors are not included, but need to be considered
for total VA draw. The GND connection points must be the same
between all of the externally powered expansion boards and the
SAT III Controller. See Figure 12-27 for further wiring details.
SAT Communication Connection
These connection points are for wiring of the RS-485 communication
loop. There are two “T” (Transmit) connections, two “R” (Receive)
connections and two “SHIELD” connection points. There are two
connection points provided for each connection for easy “daisy
chaining” to the next Satellite Controller. When connecting the
RS-485 wiring from SAT III to SAT III or SAT 3C/D/F, or SAT 3P
controller the wiring connections are as follows: connect “R” TO
“R”, “T” TO “T”, AND “SHIELD” TO “SHIELD” OR “SH”. The
RS-485 wire specifi cations are plenum-rated, jacketed stranded
18-gauge, 2-wire twisted pair with shield. 18-gauge stranded wire
is mandatory to ensure a good connection with the ¼-inch Sta-Con
connectors which are used to terminate the wires at the WCC III -
MCD and at the satellite controllers.
HSS EXP COMM Connection
The HSS EXP (Expansion) Port enables newer versions of the
satellite expansion boards, most notably the Binary Input with
Time Delay Board and V-Out RELAY Board to work without
connecting the previous way (separate power and hard wiring was
required). The SAT III has a single connection via the built-in HSS
EXP port on the side of the SAT III. It is designed to connect and
power up 5 HSS Expansion Boards. Connecting more than 5 HSS
Boards is possible, but each additional board will require a 24VAC
power supply.
The HSS EXP port provides power and ground, along with
communications on a 6-pin pre-made MOLEX type mini-fi t cable
connection. This cable is made with 16-gauge wire.
Each HSS Expansion Board has an 8-position address dipswitch
that is used to set up the function of the board.
The HSS EXP port can be daisy chained to the next board. The
HSS cable connections allow the HSS expansion boards to be
located up to 150 feet away from the SAT III Controller.
HSS connection cables are available in the following sizes: 6-inch,
12-inch, 18-inch, 3 feet, 25 feet, 40 feet, 80 feet, and 120 feet.
SAT III Connection Points