1
Before turning on the power
6
1-3.Rear panel input terminal block
1-3-1. Input equivalent circuit
The signal is input in the circuit by short-circuiting and opening between each input terminal and COM
terminal. Short-circuiting is performed by a contact (relay, switch, etc.) or non-contact (transistor, open
collector output, etc.)
■
In using a transistor, FET, or SSR, be careful about withstand voltage, leakage current and saturated
residual voltage.
・
Withstand voltage:
30V or more
・
Leakage current at OFF-time:
100
μ
A or less
・
Saturated residual voltage:
5V or less
■
The following shows a timing chart of the external input terminals on the rear panel.
Open collector
*
Opening
OFF
Short-circuiting
ON
Vcc
←
Inside
Ic=
COM
Push
switch
+24V
1
Outside
→
DS252
IN
ON when IN is 'H'.
Toggle
switch
Relay
contact
Transistor
IN
App.7mA
output
REC/ WRITE/ ST/ GT
OFF
ON
MIN.30ms
MIN.60ms
Summary of Contents for DS252
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