AI-LCD220-01-x Installation Manual
Document # 540231, Rev D, 05/2005
Page 9 of 18
3.5.3 The AI-LCD220-01-x utilizes three (3) connectors. P1 is a 9-pin
connector that provides power input, ground, video input, monitor
on/off control and monitor status.
The monitor on/off function (P1, Pin 5) is transition level sensitive.
Either a constant ground input or momentary ground input may be
used. If constant ground input is used, the monitor will activate to
the ON state when +28 VDC power is applied to Pin 1 and a
constant ground is on Pin 5. If no constant ground is present, then
this input will float to a high level causing the monitor to be in the
OFF state.
If momentary ground input is used, the monitor will alternate
between ON and OFF states with each momentary ground pulse of
duration between 50 and 250 msec. If momentary ground logic is
used, then the monitor will power up to an OFF state when power is
applied to Pin 1.
3.5.4 P2 is a 9-pin connector that provides power output to the SP-LCD4,
ground, and data bus control. Three (3) ID pins are also provided
on the P2 connector. These ID pins allow for up to eight (8) units to
be connected on the same AI proprietary RS-485 data bus while
maintaining independent control of each unit. Depending upon the
necessary configuration, the ID 0, ID 1, and ID 2 pins shall connect
to the ID common as suggested below:
ID 2
ID 1
ID 0
No. of Units
1 1 1 1
1
1
0
2
1 0 1 3
1
0
0
4
0 1 1 5
0
1
0
6
0 0 1 7
0
0
0
8
0 = Connected to ID Common 1 = N/C
3.5.5 P3 is a 15-pin high-density connector that provides VGA signal to
the monitor.
3.5.6 The SP-LCD4 utilizes one (1) 9-pin connector that mates with P2.
This connector pr28 VDC power input, ground, data bus
connections, and data bus configuration ID connections.
