Installation guide

6
 Input Specifications
• Input Derating
Using LT input voltage that exceeds the rated voltage, the input ON voltage, the number of input
points or the LT’s temperature can effect. Also, the LT's input section could overheat, which
could lead to an accident or malfunction. Refer to the following drawing and perform Input
Derating within the LT unit’s rated range.
Rated Voltage
DC24V
Maximum Allowable Voltage
DC28.8V
Input Method Sink/Source Input
Rated Current
6.5mA (DC24V) (IN0, IN2, IN4, IN6)
4.1mA (DC24V) (Other input)
Input Resistance
Approx. 3.7kΩ (IN0, IN2, IN4, IN6)
Approx. 5.9kΩ (Other input)
Input Derating
•Input Derating (6 page)
Input Points 16
Common Lines 1
Common Design 16 points/1 common line
Operation
Range
ON Voltage DC19V or more
OFF Voltage DC5V or less
Input Delay
Time
*1
*1 In the case of IN0, IN2, IN4, and IN6, the input delay time generates a 5µs delay.
For example, in the case of a 0.5ms-cycle sampling:
5µs (ON to OFF) + 0.5ms (sampling cycle) + 5µs (OFF to ON) = 0.51ms
A minimum 0.51ms-restriction is imposed on the input pulse width.
In the case of IN1, IN3, IN5, and from IN7 to IN15, the input delay time generates a 0.5ms-delay.
For example, in the case of a 0.5ms-cycle sampling:
0.5ms (ON to OFF) + 0.5ms (sampling cycle) + 0.5ms (OFF to ON) = 1.5ms
A minimum 1.5ms-restriction is imposed on the input-pulse width.
OFF to ON
0.5 to 20ms
*2
*2 Digital filter can be set at intervals of 0.5 ms.
ON to OFF
0.5 to 20ms
*2
Input Signal Display No LED indicators
Status Display None
Isolation Method Photocoupler Isolation
External Connection 38-pin connector (used with Output section)
External Power Supply For Signal: DC 24V
SEE
(%)
100
50
0
01020304050(°C)
Input ON Rate
Ambient Operating Temperature
For vertical mounting
DC24.0 to 25.2V
DC28.8V
For horizontal mounting
DC24.0 to 26.4V