I/O Circuitry - Sony LT 100 Gebrauchsanweisung

6-5. I/O circuitry

LZ60-P1 counter board, display unit I/O 1
COM (+) : MAX. 26.4 V, MIN. 4.8 V
V
V
The board can also be operated by connecting the +5 V DC and COM (+) pins and
switching ON/OFF between the input and 0 V pins. However, the connected other side
GND and the 0 V pin of the LT100 must be the same electric potential.
V
I
The +5 V and 0 V pins are for the input circuit. Do not use the pins for the output circuit.
!
When connecting an L (coil) load such as a relay or lamp to output pins, be sure to connect
a relay with a built-in back-voltage absorption diode, or connect a diode with a back-
voltage about three times the supply voltage in parallel with the coil. Otherwise, the
photocouplers may be damaged.
Input circuit
: MAX. COM (+) + 1 V,
IH
MIN. COM (+) – 0.8 V (or open)
: MAX. 0.5 V, MIN. 0 V
IL
Note
Output circuit
: MAX. 0.7 V (I = 10 mA)
OL OL
: MAX. 10 µA (V = 26.4 V)
OH OH
Note
Caution
To counter board output pin
To counter board COM (–)
+5V
+5V
2.1kΩ
Sharp
PC356NT
+5V
Sharp
PC356NT
Vcc
+5V DC
COM(+)
IN
0V
OUT
COM(–)
Relay
35