Honeywell S7999D SOLA User Manual page 3

4. Using pilot holes as guides, drill 1/4 in. holes through
the door panel.
5. Place the display in the opening, aligning the mounting
holes in the device with the drilled holes in the panel.
6. Secure the display to the panel with four #6-32 screws
and nuts provided.
7. Wire the 24 Vac power supply and the RS-485 cables
using the wiring diagram in Fig. 4.
8. Ensure the 8-pin connector plug is aligned with the
header pins when inserting the 8-pin connector plug
back onto the Display. Secure firmly.
9. Please make sure resistive spark cable is used with the
Sola, and route the wires away from the display as
much as possible.
WIRING
The S7999D OI Display must be appropriately wired for both
power and communications.
The communication is done over two RS-485 bus ports:
• COM1: connected directly to the SOLA device J3
connector to either Modbus (MB1 or MB2)
• COM2: A bus to the Building Automation System
Table 1. 8-pin Connector Terminals.
Pin #
1 COM1 A
2 COM1 B
3 COM1 C*
4 COM2 A
5 COM2 B
6 COM2 C*
7 24 Vac Common *
8 24 Vac Power
* These 3 terminals are connected internally and can be con-
nected to earth ground
Fig. 2. Install clamp filters on 24V and Modbus
connections.
Function
Fig. 3. Clamp filter in place.
S7999D OI DISPLAY
COM 1 COM 2
1
A B C A
4
A B C A
MB1 MB2
J3
SOLA CONTROL
COM PORTS ARE NOT RESTRICTED TO A SPECIFIC DEVICE, BUT
1
CAN BE CONNECTED TO SOLA CONTROLS OR BAS SYSTEM.
DISPLAY CAN BE CONNECTED TO MB2.
2 SIZE 24V TRANSFORMER ACCORDING TO LOAD REQUIREMENT.
3
ENSURE THE S7999D 24 VAC COM TERMINAL AND THE SOLA COMMON
TERMINAL (J8-2) ARE BOTH CONNECTED TO THE 24 VAC RTN (RETURN)
OF THE EXTERNAL TRANSFORMER.
4 TO PROTECT AGAINST CONDUCTED AND RADIATED TRANSIENT NOISE,
USE CLAMP FILTERS (INCLUDED IN 50063482-001 BAG ASSEMBLY) AS
ILLUSTRATED IN FIGURES 2 AND 3.
Fig. 4. S7999D wiring diagram.
3
24 VAC
B C COM POWER
BAS
24 VAC
24 VAC RTN
2
B C 1 2
24 V
1
J8
3
M32736
65-0315—02