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S7999B, S7999C SOLA LOCAL OPERATOR INTERFACE
65-0303—05 10
4. Drill 3/16 in. holes for mounting the display. 5. Secure the OI Display to the panel using the four #6-32
screws and nuts, as shown in Fig. 10. (Standoffs are pro-
vided for mounting the OI Display from the back of the
door.)
Fig. 10. Mounting the S7999C OI Display behind the door panel.
S7999C OI Display Power supply
mounting.
1. Select a location inside the enclosure for mounting the
power supply.
2. Using the power supply as a template, mark the loca-
tions of two mounting holes in the enclosure.
3. Remove the power supply.
4. Drill 1/4 in. holes through the panel at the marked loca-
tions and secure the power supply with the two #6-32
screws and nuts provided.
WIRING (S7999C OI DISPLAY)
The S7999C OI display must be appropriately wired for both
power and communications.
1. Wire the power supply and the RS-485 communication
cables per Table 2 and the wiring diagram in Fig. 11.
• Y and G are connected directly to the display and
either SOLA Control connector J3 Modbus (MB1) or
Modbus (MB2).
2. Make sure the 12 Vdc power supply (supplied with the
S7999C) is connected securely to the 120 Vac power
source.
Fig. 11. S7999C wiring diagram.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Line voltage is present at the power supply.
M29868
SPACER (4)
WALL
CUTOUT
OPTIONAL
CUTOUT
Table 2. 4-pin Connector Terminals (located on the
back of the S7999C OI Display).
Pin # Function
Y Data (-) Output (Modbus b)
+ 12Vdc input
- 12Vdc Input
G Data (+) Output (Modbus a)
Table 2. 4-pin Connector Terminals (located on the
back of the S7999C OI Display).
Pin # Function
M32008
A
B
C
AB
C
1
2
3
MB1
MB2
ECOM J3
R7910 HYDRONIC CONTROL OR
R7911 STEAM CONTROL
DO NOT CONNECT S7999C TO TERMINALS 1 2 3 AS THIS WILL RENDER
THE DISPLAY INOPERABLE.
S7999C CAN BE
CONNECTED TO
EITHER MB1 OR
MB2 A, B, C
TERMINALS
S7999C MID-
LEVEL DISPLAY
Y
+
−G
120
VAC
L2
L1
V-INFINITY
FSC-S5-12U
V+
V–
N
L
WIRING KEY
LINE VOLTAGE
LOW VOLTAGE
DATA
1
1