14
2.O5 Electrical Connections
(continued)
Communication: Machine Communication Boxes
The Dositec’s Communication Boxes are the interface between the signals coming from the washer and the formula
programming to deliver certain products at certain times. The simple On/Off signals from the washer are translated into digital
packets of information and transmitted back to the Dositec PLC over a digital network. This allows a single four-wire cable to
daisy-chain from one communication box to another, which greatly simplifies installation.
The connection at the main panel is on Bank X8 at L1+, M, A and B as shown below. The four conductor cable runs to the
“In” connector of the box closest to the main panel. Any remaining boxes are connected with a cable running from the “Out”
connector to the “In” connector of the next box.
The boxes are identified to the PLC by the DIP switch settings as shown below.
If you are using the Remote Formula
Selection accessory, their DIP switches must be set to match the Communication Box to which they are connected, as
shown by the red circles below.
2.OO installation
(continued)
470
Ω
Resistor
Box 1
Box 2
In
Out
In
Out
Other
Boxes
(If any)
= 1
= 2
= 3
= 4
= 5
= 6
= 7
= 8
= 9
= 10
Box Identification DIP Switch Settings
Every Box
Connection
(top down)
Brown
Yellow
Green
White
Communication: Machine Signals
The signal wires from each washer connect to their Dositec
Communications Box using the row of connectors at the lower
edge of the circuit board, with the grounds jumpered to have a
common connection, as shown to the right.
Communication: DIP Switch 5 - Auto-Formula Select Time
On the DIP switch that identifies the Communications Box (see
above),
the fifth DIP switch is used to adjust the time period
for Auto-Formula Select (AFS).
With switch 5 in the
Off position, 5 seconds
is the AFS time, so
an AFS signal of 15 seconds would select Formula 3. With switch
5 in the
On position, 3 seconds
is the AFS time, so an AFS
signal of 9 seconds would select Formula 3.
Washer
Signal
Wires
5 = Off
AFS time
is 5 sec.
5 = On
AFS time
is 3 sec.
Installer
supplied wiring,
color will vary!
1
2
3
4
5
6
7
8
