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S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE
65-0303—05 6
Fig. 4. S7999B wiring diagram for lead lag.
BUILDING AUTOMATION
SYSTEM (BAS)
CONFIGURATION
Connect the BAS Modbus wiring to COM2 of the S7999B as
shown in Fig. 5.
Ensure all S7999B devices have unique Modbus addresses as
defined in Fig. 5.
M32005
2
1
4
56789
3
+12
(B)
(A)
N/C
GND
(C)
+12
N/C
(A)
(B)
S7999B
AS SYSTEM DISPLAY
COM1
COM2
L1
L2
120
VAC
VADJ
V+
N
L
V-
DC OUT
(COMMON GND)
12 DC OUT +
EARTH
GROUND
120VAC (L1)
NEUTRAL (L2)
MEAN WELL S-25-12
DO NOT CONNECT THE S7999B TO TERMINALS 1 2 3.
THIS WILL RENDER THE DISPLAY INOPERABLE.
DISPLAY CAN ALSO BE CONNECTED TO MB2; A, B, C
AND THE SOLA SLAVES NEED TO BE WIRED TO MB1.
CONTROLLER HAS TWO AVAILABLE MODBUS
CONNECTIONS: THIS CONFIGURATION REQUIRES ONE
FOR CONTROL LEAD LAG COMMUNICATION AND ONE
FOR A S7999B SYSTEM DISPLAY.
THERE IS NOT A CONNECTION AVAILABLE FOR A
LOCAL TOUCHSCREEN DISPLAY (S7999C).
THE ECOM CONNECTION IS AVAILABLE FOR
CONNECTIONS OF A LOCAL KEYBOARD
DISPLAY MODULE.
UP TO A MAXIMUM OF 8 SOLA SLAVES IN A
LEAD LAG NETWORK.
POWER SUPPLY
WIRING KEY
LOW VOLTAGE
DATA
LINE VOLTAGE
SOLA LL MASTER
AND SLAVE 1
23CBACBA1
J3
MB1 ECOMMB2
23CBACBA1
SOLA SLAVE 2
J3
MB1 ECOMMB2
23CBACBA1
SOLA SLAVE 3
J3
MB1 ECOMMB2
23CBACBA1
SOLA SLAVE 4
J3
MB1 ECOMMB2
1
1
2
3
3
4
4
2