WattMaster WCC III part 21 - Manual (Page 7)

WCC III Technical Guide 20-5
20. GLOBAL BRIDGE BOARD INSTALLATION
Troubleshooting the WCC III RS-485
Communications Loop
What is the WCC III RS-485 communications loop
voltage measurement on a SAT III controller or on a
WCC II to WCC III Global Bridge board?
There are two conditions for Voltage measurements of the WCC
III RS-485 communications loop.
1st Condition:
The WCC III RS-485 communications loop
is plugged into a SAT III controller or on a WCC II to WCC
III Global Bridge board, and you are measuring the voltage
at the SAT III controller or on a WCC II to WCC III Global
Bridge board.
8 7
SAT ADDRESS 2 1
4
8
A 3 WIRE ROOM SENSOR WILL NOT REQUIRE A LOAD RESISTOR WHEN SET FOR A 1 VOLT INPUT. WattMaster Controls Inc.
BINARY
INPUTS
BINARY
INPUTS
L8
ON OFF
128
32
16
64
L4 L3 L2 L1
L6 L5
L7
L11 L12
ON OFF
L10 L9
ON OFF
L15 L16
L14
L13
C H
4
3
5
6
2
1
LOCAL SET
STATUS 2
STATUS 3
STATUS 1
HSS XMIT
LOCAL SET LOCAL SET DISABLE
BATT ON/ OFF PULSE INPUT
OPTION 1
TEST
OPTION 3 OPTION 2
ON OFF STATUS
HSS REC
SAT XMIT
SAT REC
ANALOG INPUT JUMPER SELECTION
A 2 WIRE ROOM SENSOR WILL REQUIRE A 300 OHM LOAD RESISTOR WHEN SET FOR A 1 VOLT INPUT.
A 4 TO 20 mA SENSOR WILL REQUIRE A 50 OHM LOAD RESISTOR WHEN SET FOR A 1 VOLT INPUT, OR A 250 OHM LOAD RESISTOR WHEN SET FOR A 5 VOLT INPUT.
CURRENT INPUT
THERMISTOR INPUT
0 - 1V 0 - 5V 0 - 10V THERM
0 - 1V 0 - 5V 0 - 10V THERM
0 TO 10V
INPUT
0 TO 5V INPUT
0 TO 1V INPUT
0 - 10V
0 - 1V 0 - 5V 0 - 10V THERM
0 - 1V 0 - 5V
THERM
0 - 1V 0 - 5V 0 - 10V THERM
PROGRAMMABLE CONTROLLER
SAT III
TO HSS EXPANSION BOARDS.
UP TO TWO BINARY INPUT
BOARDS, AND UP TO TWO
BINARY OUTPUT BOARDS
MAY BE CONNECTED TO A
SAT III CONTROLLER.
SAT III CONTROLLER
24VAC
24
V
A
C
GND
GROUND
WARNING: OBSERVE POLARITY
BETWEEN THE SAT III AND THE WCC II
TO WCC III GLOBAL BRIDGE BOARD -
GROUND CONNECTIONS MUST BE THE
SAME.
TO OTHER
SAT III OR TO
WCC III - MCD
24VAC 120VAC
TO OTHER SAT III
CONTROLLERS OR TO
WCC III - MCD
WIRE "T" TO "T"
"R" TO "R"
"SHD" TO "SHD"
GND
24VAC
C
R/T SHLD
COMM T
COMM R DRIVER 485
EEPROM
VBAT COMM
CHASSIS GND
POWER
SAT II STAT
SAT II
SAT III
PROGRAM SOCKET
YS102210 REV 1
GLOBAL BRIDGE
MADE IN USA
ADDRESS
24C128
PCF8583
LT1785
WATTMASTER CONTROLS INC
8
SAT 2 1
4
BINARY
INPUTS
BINARY
INPUTS
L8
ON OFF
128
32
16
64
L4 L3 L2 L1
L6 L5
L7
L11 L12
ON OFF
L10 L9
ON OFF
L15 L16
L14
L13
LOCAL SET
LOCAL SET DISABLE
BATT ON/ OFF PULSE INPUT
TEST
ON OFF
SAT II
H
C
COM
CHANNEL
2 1 3 4
2 1 3 4
5 6 7 8
5 6 7 8
V
OUT
GND
L O
A D
+V
ATI
EACH CONTACT IS RATED FOR 24VAC OR VDC
@ .5 AMP MAX
0-15VDC OUTPUT MIN LOAD
IS 1K OHM
RESISTIVE
VDC ONLY
WATTMASTER
CONTROLS GROUP
24 VAC ONLY
POWER CONSUMPTION
15VA / 625mA
NUMBER
POWER ---
SAT II CONTROLLER
WARNING: OBSERVE POLARITY BETWEEN THE
SAT II AND THE WCC II TO WCC III GLOBAL
BRIDGE BOARD.
THE GROUND CONNECTIONS MUST BE THE
SAME. DAMAGE TO THE SAT II CONTROLLER
OR TO THE WCC II TO WCC III GLOBAL BRIDGE
BINARY BOARD CAN RESULT IN VOIDING THE
WARRANTY
24
V
A
C
GND
120VAC WIRING IS BY OTHERS
THE VA RATING FOR THE SAT II CONTROLLER IS 15VA.
THE VA RATING FOR THE SAT III CONTROLLER IS 15VA.
THE VA RATING FOR THE WCC II TO WCC II GLOBAL BRIDGE
BOARD IS 7.5 VA.
TO OTHER
SAT II OR TO
THE WCC II
COMPUTER
WIRE NUT
24VAC
GROUND
24VAC 120VAC
TO OTHER SAT II
CONTROLLERS OR
TO THE WCC II
COMPUTER
WIRE "RT" TO "RT"
"C" TO "C"
TIE THE "SHIELD"
WIRES TOGETHER
120VAC WIRING IS BY OTHERS
WCC II TO WCC III
GLOBAL BRIDGE
WIRE NUT
Figure 20-4: Wiring diagram showing how to connect the WCC III to WCC II systems using the WCC II to WCC III
Global Bridge board.
On the RS-485 loop for a SAT III controller or on a WCC
II to WCC III Global Bridge board, the “T” (+) and ”R” (-)
terminals should measure “T”(+) @ 2.7VDC and “R”(-) @
3.0VDC voltages. These are approximate values, but should
be used as base line measurements.
Troubleshooting Communication Loops