3
*Control Contacts: These connections are wired in series with the control
line just as any other belt switch. In order to protect the wire,
a 15-amp in-
line fuse should be installed in series with the GREEN wire.
The switching
is done by a relay with either normally open (RED) or normally closed
(BROWN) contacts. Most control lines will need to be opened to shut down
the belt drive. In this case, connect the GREEN (common) and the RED
(normally open) wires in series with the control line. When the belt is
running above the preset point the GREEN and RED wires will be shorted.
A belt slip condition will cause these wires to open.
SETUP INSTRUCTIONS
STEP 1 – SPEED
Refer to Figure 2. Temporarily take a jumper wire and short out the control
wires (GREEN or RED) so that the belt will run. Start the belt. Turn the
speed adjustment fully counterclockwise. The red calibration light should
come on. Now start turning it clockwise until the light goes out. At this
point, you should back it counterclockwise about 1/8 turn to the point where
the light just comes on. If the belt slows from its present speed, the light
will go out, and the relay will drop out. Turning the speed adjustment
clockwise raises the cutoff point (faster). Turning it counterclockwise
lowers the cutoff point (slower).
STEP 2 – DELAY
Refer to Figure 2. The delay adjustment was set fully counterclockwise (no
delay) at the factory. A maximum of ten seconds’ delay can be set. Turning
the delay adjustment clockwise increases delay, while turning it
counterclockwise decreases delay. Delay starts when the calibration light
goes out. It is instantly reset when the light turns on.
