Unipulse F805AT-BC, Operation Manual

Page: 140 / 202

8.INTERFACE
125
Outputting current signal
Connect an external device (max. load resistance: 350 Ω ) b(ch1) and –(ch1), or
b(ch2) and –(ch2) terminals of F805AT-BC.
Pulse input equivalent circuit
Two states of input signal (High and Low) are produced by opening input from, or
closing to the COM terminal. Opening/closing of the input can be realized either by using
contact devices (relay, switch) or non-contact devices (transistor, open-collector TTL).
＋
－
External device
Load resistance < 350 Ω
SIG
GND
←
Inside Outside
→
＋
(ch1)
F805AT-BC
－ （
ch1
）
＋
－
External device
Load resistance < 350 Ω
SIG
GND
＋
(ch2)
－ （
ch2
）
Note:
・ Applying external voltage to the terminals may result in D/A converter
damages.
・ Connecting capacitive load may give rise to oscillation in the output
signal.
External devices must be capable of sinking more than 30mA (Ic).
Leak current in the external device should be less than 100
μ A.
F805AT-BC
Inside
Ic =
COM
Transistor
Open-collector TTL
Open
OFF
Close
ON
Switch
approx. 20mA
(“ON” when IN is “H”)
Vcc
+12V
(“ON” IN is “H”)