WattMaster WCC III part 16 - Manual (Page 3)

WCC III Technical Guide 15-1
15. SAT 3C/D/F INSTALLATION
SECTION 15:
SAT 3C/D/F INSTALLATION GUIDE
__________________________________________
SAT 3C/D/F Overview
SAT 3C/D/F General Specifications:
The SAT 3C/D/F controller is a drop-in replacement for the older SAT 2d or SAT 2c line of controllers that WattMaster
Controls Inc. manufactured from 1983 to 2006. The SAT 3C/D/F is an advanced product improvement over the older SAT 2c/d
type controller.
The SAT 3C/D/F is a communication interface that converts/transfers data between the WCC III satellite based system and the
WattMaster Controls series of standalone controllers that are referred to as TUC (Terminal Unit Controllers) or RTU (Roof
Top Units.
The SAT 3C provides the ability to communicate with up to 8 RTUs or TUC5Rs depending on the SAT 3C’s application software
code.
The SAT 3D provides the ability to communicate with up to 32 TUC2Rs, VAVZ IIs, TUC5RXs or TUC5Rs depending on the
SAT 3D’s application software code.
The SAT 3F provides the ability to communicate with up to 16 TUC2Rs, VAVZ IIs, TUC5RXs or TUC5R depending on the
SAT 3F’s application software code.
The SAT 3C/D/F features the following:
Two RS-485 communication ports. The satellite communications port runs at 19.2K baud and is connected to other SAT 3 type
devices, while the TUC communication port runs at 9600 baud and connects between the SAT 3C/D/F interface and to the
TUC or RTU type devices.
On the front cover of the SAT 3C/D/F controller, there are 8 LEDs for easier user troubleshooting diagnostics.
There are two 8 position dipswitches that are also located on the cover of the SAT 3C/D/F controller. One dipswitch is a
satellite address base switch, and the other is an option switch to select various different options on the SAT 3C/D/F controller.
The SAT III type interconnecting communications:
It is a WattMaster Controls proprietary RS-485 based protocol, and it is based on packetized data in pre-defined parameter
blocks. Troubleshooting of the SAT III RS-485 communication’s loop and the TUC RS-485 communication’s loop is possible
with a Digital Volt Meter. (The older SAT II communications was based on Manchester encoded data, and was very reliable,
but was hard to troubleshoot)
For the WCC III system. WattMaster Controls has developed a new isolated 485 communication bus that can support 239 SAT
IIIs on four separate communications channels (60 Satellite loads per channel) .
A single channel can support up to 60 SAT III type loads on one communications loop. This is for redundant operation—if for
some unknown reason a WCC III communications channel loop goes down, it will not cause other SAT III type controllers on
the other loops to lose communications to the WCC III - MCD.
"D" MODE
"C" MODE
"C" MODE ADDRESSING NOTES
"C" MODE SAT III ADDRESSING STARTS
AT ADDRESS 8.
EACH "C" MODE SAT III TAKES UP
8 SAT III LOGICAL ADDRESSES.
A "C" MODE SATIII CAN COMMUNICATE
WITH 8 DEVICES TOTAL.
"D" MODE ADDRESSING NOTES
"D" MODE SAT III ADDRESSING STARTS
AT ADDRESS 4.
EACH "D" MODE SAT III TAKES UP 4
SAT III LOGICAL ADDRESSES.
A "D" MODE SAT III CAN COMMUNICATE
WITH 32 DEVICES TOTAL.
SAT IIICD
Communications Interface
TUC XMIT
ON OFF
ON OFF
SAT ADDRESS 1
STATUS
LOCAL SET
16
4
2
8
64
32
128
LOCAL SET DISABLE
OPTION 2
LOCAL SET
OPTION 1
TEST
BATT ON/ OFF
TUC REC
SAT XMIT
SAT REC
X
C
D
F
TUC COMMUNICATIONS LOOP
RS-485 @ 9600 BAUD
SAT COMMUNICATIONS LOOP
RS-485 @ 19200 BAUD
OPTION 3
OPTION 4