WattMaster WCC II - Manual (Page 14)

Section 1: General Instructions
WCC II Operator’s Guide
Operator Interfaces 1-4
Binary Inputs
A binary input is an On/Off (dry contact closure) signal sent to
the SAT II controller to allow monitoring of air fl ow switches,
switch settings, etc. The SAT II controller comes standard with
16 small toggle switches on its front panel labeled, L1-L16 which
are in effect manually controlled binary inputs. The ECC/WCC II
monitors the On/Off status of these switches and can control and/or
alarm based on the position of these switches. The binary input
board(s) allow the manual toggle switches to be replaced with a
terminal strip which accepts wiring from remote mounted binary
input devices.
The SAT II controller has two sets of 8 small toggle switches on its
front cover labeled L1-L16. Switches L1-L8 are housed together in
one module, and switches L9-L16 are housed together in another
module. One module of switches is removed for each binary input
board and replaced with a ribbon cable which connects the binary
input board to the SAT II controller. The binary devices to be
monitored are then wired to the terminal strip of the binary input
board. The binary input board requires a 24 VAC power supply.