Sony LT10 Series - 7-4. Connection circuit

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English
7-4. Connection circuit
Output circuit : Open collector output
Input circuit (#º pin DRQ) : Photocoupler input
• Use a switching diode with a back-voltage of
approximately 3 times the supply voltage (+COM) (80 V
back-withstand voltage with a supply voltage of 24 V).
Output signal rating
On : V
OL
= MAX. 0.7 V (when output current I
OL
= 24 mA)
Off : V
OH
= MAX. 26.4 V (output current I
OH
= MAX. 250 µA)
Note
When connecting an L (coil) load such as a relay to output pins, be
sure to connect a back-voltage absorption diode in parallel with the
coil. Otherwise, the transistors inside the output IC may be damaged.
GND
OUT IN
+COM
–COM
74LS06
Display unit
Relay
Externally connected device (Connection Type 2)
Input signal rating
On : V
IL
= MAX. 0.5 V (when input current I
IL
= –15 mA)
Off : V
IH
= MIN. 4.0 V to MAX. 26.4 V
Input circuit (except pin #º DRQ) : TTL level input
Input signal rating
On : V
IL
= MAX. 1.0 V (when input current I
IL
= –5 mA)
Off : V
IH
= MIN. 4.0 V to MAX. 26.4 V
Display unit
GND
OUT IN
+COM
–COM
74LS06
Externally connected device (Connection Type 1)
DRQ input
Display unit
5V
330Ω
GND –COM
OUT
IN
Externally connected device (Connection Type)
Start, reset, Measuring
mode selection input,
and comparator
value selection input
OUT
GND
IN
–COM
5V
47kΩ
47kΩ
1kΩ
Display unit
Externally connected device
(Connection Type)