26
2 SPECIFICATIONS
2.3 Specifications of Interfaces with External Devices of the RD77MS
2.3
Specifications of Interfaces with External Devices
of the RD77MS
Electrical specifications of input signals
External input signal
■
Specifications of external input signal
Forced stop input
■
Specifications of forced stop input signal
Item
Specifications
Signal name
Input signal (SIN)
Number of input points
RD77MS2: 10 points, RD77MS4/RD77MS8/RD77MS16: 20 points
Input method
Positive common/Negative common shared
Common terminal arrangement
4 points/common (Common contact: COM)
Isolation method
Photocoupler
Rated input voltage
24 V DC
Rated input current (I
IN
)
Approx. 5 mA
Operating voltage range
19.2 to 26.4 V DC (24 V DC+10/-20%, ripple ratio 5% or less)
ON voltage/current
17.5 V DC or more/3.5 mA or more
OFF voltage/current
7 V DC or less/1 mA or less
Input resistance
Approx. 6.8 k
Ω
Response time
OFF
ON
1 ms or less
ON
OFF
Item
Specifications
Number of input points
1 point
Input method
Positive common/Negative common shared
Common terminal arrangement
1 point/common (Common contact: EMI.COM)
Isolation method
Photocoupler
Rated input voltage
24 V DC
Rated input current (I
IN
)
Approx. 5 mA
Operating voltage range
19.2 to 26.4 V DC (24 V DC+10/-20%, ripple ratio 5% or less)
ON voltage/current
17.5 V DC or more/3.5 mA or more
OFF voltage/current
7 V DC or less/1 mA or less
Input resistance
Approx. 6.8 k
Ω
Response time
OFF
ON
4 ms or less
ON
OFF
