S7999B SYSTEM DISPLAY
65-0283—2
10
Fig. 7. Local S7999B wiring diagram (COM1 not used).
M24235
120 VAC
L1
L2
120 VAC (L1)
N
L
NEUTRAL (L2)
EARTH GROUND
V+
12 DC OUT+
V
DC OUT-
(COMMON/GND)
V ADJ
MEAN WELL S-25-12
POWER SUPPLY
1 2 3 4 5 6 7 8 9
GND
(C)
+12 +12 (b) (a) N/C N/C (a) (b)
S7999B
SYSTEM DISPLAY
3
2
4
1
COM1
COM2
CONNECT ALL THREE “C” WIRES TO V- TERMINAL
ON POWER SUPPLY.
3
CONNECT SHIELD TO EARTH GROUND.
1
S7810M
MODBUS
MODULE
8
7
6
UDC2500
STACK
TEMPERATURE
16
17
18
UDC2500
PID LOAD
CONTROL
16
17
18
UDC2500
THERMAL
SHOCK
16
17
18
2 SEE 65-0249 FOR CONTROL BUS (LOCAL RS-485
COMMUNICATION BUS) WIRING.
4 UP TO A TOTAL OF 99 S7810M AND UDC CONTROLLERS CAN BE
CONNECTED TO THE S7999B. SEE 65-0249 AND UDC MANUALS
FOR WIRING.
C
A
B
D-
D+
SHLD
D-
D+
SHLD
D-
D+
SHLD
MODBUS BAUD RATE MUST BE SET FOR 19200.
5
5
120
Ω
1/4 WATT RESISTOR BETWEEN TERMINALS
A AND B OF THE MODBUS AT THE FARTHEST S7810M
OR UDC MAY BE NECESSARY FOR LONG RS-485 RUNS.
6
6
