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M800W/M80W Series Connection and Setup Manual
4 General Specifications
(a) Outline of scan input circuit
Input circuit
Input conditions
1
Number of points
2
Configuration
3
Rated voltage
4
Minimum applicable load
5
Input signal holding time
(*1)
The common signals are changed over with scan input as shown in the following drawing. Key input data
can be received when the common signal is LOW.
The common signal changeover cycle is 11.68ms, but the input signal is recognized only when state of
the signal is held longer than the ladder processing cycle time.
KYC0*
KYC1*
KYC2*
KYC3*
KYC4*
KYC5*
KYC6*
KYC7*
(Note)
Sneak path
prevention diode
OPKB
KYC0*
KYC1*
KYC2*
:
:
KYD0*
KYD1*
KYD2*
:
:
Note that "11.68 ms or more" is a guide of the "Input signal holding time". The input signal is
recognized only when its "ON" state is held longer than the ladder processing cycle time.
11.68ms
To perform a scan input, connect a sneak path prevention diode as illustrated below.
Input signals may not be read correctly without the sneak path prevention diode.
:
:
Control
circuit
0V
5V
:
:
:
:
64 points
Matrix of 8 common signals × 8 data signals
5 VDC
1.4 mA per point
11.68 ms or more (*1)
1.46ms
KYC0* - KYC7*
KYD0* - KYD7*
117
IB-1501268-K
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