Equivalent Circuit (Input); Equivalent Circuit (Output) - Unipulse f395 Operation Manual

4-3-3. Equivalent Circuit (Input)

The signal input circuit inputs a signal by short-circuiting or opening the input terminal
and COM terminal. Short-circuiting is performed by contact (relay, switch, etc.) or non-
contact (transistor, TTL open collector output, etc.)
Vcc

4-3-4. Equivalent Circuit (Output)

The signal output circuit produces transistor open collector output.
Vcc
+12V
Transistor state
Output data
0 OFF
1 ON
F395
Inside
+12V +12V
Approx.
IC= Push swich Toggle swich Relay contact Transistor
6mA
COM
・ No external voltage should be applied to the signal input circuit.
・ External elements should pass Ic=10mA or more.
・ Leaks of external elements should be 100μA or less.
・The external input circuit is minus (-) common. A circuit of source
type cannot be connected.
F395
Vext
Inside
COM
Vceo=30V （max）
Ic=120mA （max）
・ For the relay driving power supply (Vext), prepare an external power
supply.
・ Do not short-circuit any load (relay coil, etc.); otherwise the output
Tr transistor will be damaged.
・ Connect surge absorbers or spark killers to the relay circuit (coil side and
contact side) as shown in the illustration to minimize surge voltage.
4.Methods of Connection
Open: OFF
Short circuit: ON
Spark killer
Load
Relay
Varistor
Spark killer
Load
TTL open collector output
(ON when IN is ' H ' )
IN
IN
DC power
supply
AC power
supply
30