LEGEND
COM — Common
R
— Relay
D
— Diode
SIO — Serial Input/Output
LED
— Light-Emitting Diode
SW — Switch
N.C.
— Normally Closed
T
— Terminal
N.O.
— Normally Open
*Where X is the unit control software version number (1 or 2).
Fig. 11 — Control Board Diagram
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