25
3-6-1. Connecting control input
terminals
Signals are input with the external input circuit when shorted
or opened between any control input terminal and the COM
terminal.
Shorts occur from both contact and non-contact (transistor,
TTL open collector).
TD-9000T
Vcc +5V
About
20mA
COM 19–20
PUSH switch
Example when contact
signal used
Example when transistor
used
Example when TTL open
collector used
IN
ON when IN is H
o When external contact is ON, about 20 mA flows. When
using a transistor, for example, select one with a resistance
of at least 10V and elements that allow a flow of at least
40mA when on.
o Do not apply voltage from an external source.
3-6-2. Control input signals
Differential pulse displacement sensor Aphase, Bphase
Connect a differential square wave output type displace-
ment sensor (page22).
Force backlight lighting
Enable the backlight while this is ON.
Prevent touchscreen operation
Disable touchscreen operation while this is ON.
Force reset
Setting this to ON restarts the unit.
Switch work
These can be used to specify the work number when the
“WORK SWITCHING” setting on the WORK settings screen
is “EXT. INPUT”.
WORK SWITCHING 1 is the LSB and WORK SWITCHING 8 is
the MSB.
WORK NUMBER
WORK SWITCHING
8 4 2 1
1 OFF OFF OFF OFF
2 OFF OFF OFF ON
3 OFF OFF ON OFF
4 OFF OFF ON ON
5 OFF ON OFF OFF
6 OFF ON OFF ON
7 OFF ON ON OFF
8 OFF ON ON ON
9 ON OFF OFF OFF
10 ON OFF OFF ON
11 ON OFF ON OFF
12 ON OFF ON ON
13 ON ON OFF OFF
14 ON ON OFF ON
15 ON ON ON OFF
16 ON ON ON ON
Switch zone
This is enabled when ZONE SWITCHING is set to EXT. INPUT
(page57). While ON, it becomes zone. Switching is limited
to zones that have zone judgment enabled (page54).
Clear results (reset measurement results)
Setting this to ON clears judgment results.
All judgment output is turned OFF, and continuous judg-
ment (CONTINUE) starts.
Enable/disable judgment output
Setting this to ON disables all judgment output.
3. Making connections
Continued on the next page e
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