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The Knight-Trak Signal Input Board (SIB) is an interface module which receives pump activation signals
of 14 to 240 Volts from the washmachine and sends them as low-voltage data signals to the Knight-Trak
II Dispenser. The module is available in 6, or 10 pump configurations.
The SIB should be installed in the washer near the supply signal outputs
(1) Inspect the wiring diagram for the laundry machine (and card reader, if required). They are available
from the manufacturer upon request. In addition, you may refer to the Knight Equipment Laundry
Interface Manual for connection information.
(2) Measure the signal voltage between the signal wires and signal common (NOT case ground). This
measurement must be taken when the laundry machine is operating and products are being called
for.
(3) BEFORE CONTINUING TO THE NEXT STEP, DISCONNECT ALL ELECTRICAL CONNECTIONS
TO THE LAUNDRY MACHINE, CARD READER, AND INJECTOR. VERIFY THIS WITH A
VOLTMETER.
(4) Upon request, Knight Equipment provides a laundry wiring interface manual. Use this, a schematic
of the machine, or consult the dealer for proper signal points. The SIB has provisions for "split
common" connection (some washmachine's have provisions for separate "wash" and "rinse"
commons). See the next page.
(5) Connect the color coded interface wire (Knight part number #0300058) to the SIB with gray wire
nuts. Connect the other end to the Laundry Formula Programmer (LFP) mounted on the front of the
machine. Wires must be shielded and maximum wire length is 100 feet. Color-coded markings
labeled "SIB" are on both boards. See the next page.
(6) Housed inside the plastic module is a 1 amp fuse to protect both the SIB and LFP. Consult the
factory if the fuse blows.
(7) The SIB is equipped with signal indicator lights. When a signal of sufficient voltage and current (24-
240v) is present the light will activate. This and a voltmeter are the best way to determine if a signal
is present from the washer, and the wiring is correct.
Some washmachines may have been provided with a toggle switch for selecting formulas. Other
machines may need the addition of a toggle switch to select formulas. If this is the case, connect a toggle
switch to the NO VOLTAGE - FORM SEL connections on the SIB. A momentary switch may be added
for defeating bleach signals.
Additionally, an optional RSB-1000 remote signal box can be used. The RSB-1000 provides both a
formula select switch and a bleach defeat switch to defeat bleach signals from triggering bleach pumps.
0901039 Rev: C (05/01)
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Page 11 of 16
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