LINK Systems System 1100 Tonnage Monitor - Manual (Page 68)

INSTALLATION
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5-9
Figure 23. Connection of the OIT to the Logic Unit.
to the Channel 2 terminals.
For a four channel System 1100, connect the strain link
designated to be CHANNEL 1 to the Channel 1 terminals, and the
strain links designated to be connected to channels 2, 3, and
4, respectively to the Channel 2, 3, and 4 terminals.
5.4.2 Connecting the OIT to the Logic Unit (panel-mount units)
For the panel-mount System 1100 (units in which the operator
interface electronics is housed in a separate enclosure from the
logic electronics) the Operator Interface Terminal (OIT) must be
wired to the Logic Unit. This connection is made through a four
conductor (2 twisted pairs) shielded cable. Connections should be
made as shown in Figure 22.
Connect the red wire to the KEYBOARD A terminal, the black wire to
the KEYBOARD B terminal, and the green wire to the KEYBOARD C
terminal at both the OIT and the Logic Unit. The white wire is not
used and should be cut off at both ends of the cable. The two
shield wires (each twisted pair is shielded) should be connected
with the green wire to the KEYBOARD C terminal at the Logic Unit.
The shield wires are not connected at the OIT end of the cable and
should be cut off.
5.4.3 Connecting the Optional Cam Switch for Zeroing
1) The terminal for the End Of Cycle cam switch is shown in
Figure 25. To install the zeroing cam switch, connect a wire
from the EOC terminal (End Of Cycle) on the Logic board to one
side of the cam switch contact. If the System 1100 is
grounded to the machine ground, the second side of the cam