Ext. In Circuit; Output - Sony LT10 Series Manual

8-5. EXT. IN circuit

Input circuit : TTL level input
Display unit
5V
1kΩ
47kΩ
IN
47kΩ
GND
Input signal rating
On : V = MAX. 1.0 V (when input current I
IL
Off : V = MIN. 4.0 V to MAX. 26.4 V
IH
70
Externally connected device
(Connection Type)
EXT.IN input
OUT
–COM
= –5 mA)
IL

8-6. Output

To output measured data from the RS-232C choose one of
the following four methods.
1. Input to the EXT.IN terminal 1
Initial setting: (set at time of shipping)
This mode is for when the PZ201 foot-switch (optional)
is used. Data is output A ms after an "L" level signal has
been received.
EXT. IN
A
2. Input to the EXT.IN terminal 2
Initial setting:
Mode for shortening the output interval. (Processed as
an interrupt.)
However, there must be no chattering in the input
signal. Data is output after an "L" level signal has been
received.
EXT. IN
A'
1 1 1 1
B
2 2 2 2
B'