Xinje XS Series - 5-2. DC Input Signal

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5-2．DC input signal
(1) NPN mode
◼ Input terminal
Input terminal and M terminal is connected by no voltage contactor or NPN open collector transistor,
then the input is ON, the corresponding LED lights.
◼ Input circuit
The input primary circuit and secondary circuit are insulated by optical coupler, and the secondary circuit
is equipped with C-R filter. This is set to prevent misoperation caused by input contact vibration or input
line mixed noise.
Due to the above reasons, for input ON→OFF，OFF→ON changes, the response time lags about 6ms
inside the PLC. Digital filter is built in the input terminal.
◼ Input sensitivity
The input current of the programmable controller is DC24V 7mA, but for the sake of reliable operation,
when it needs to be on, it is more than 4.5mA, and when it is off, it is less than 1.5mA.
(2) Differential mode (not support by XSDH series)
◼ Input terminal
Input terminal and M terminal is connected by DC5V contactor, then the input is ON, the corresponding
LED lights.
◼ Input circuit
The input primary circuit and secondary circuit are insulated by optical coupler, and the secondary circuit
is equipped with C-R filter. This is set to prevent misoperation caused by input contact vibration or input
line mixed noise.
Due to the above reasons, for input ON→OFF，OFF→ON changes, the response time lags about 10ms
inside the PLC. Digital filter is built in the input terminal.
◼ Input sensitivity
The input current of the programmable controller is DC5V 12mA, but for the sake of reliable operation,
when it needs to be on, it is more than 4.5mA, and when it is off, it is less than 1.5mA.
(3) PNP mode
◼ Input terminal
When DC24V voltage contact or PNP open collector transistor is used between the input terminal and
COM terminal, the input is ON, and the corresponding input LED is on. Multiple input COM terminals
can be connected in the programmable controller.
◼ Input circuit
The input primary circuit and secondary circuit are isolated by optical coupler, and the secondary circuit is
equipped with C-R filter. This is set to prevent misoperation caused by vibration of input contact or noise
mixed with input circuit. Because of the above reasons, for the changes of input ON → OFF, OFF → ON,
the response time lags about 10ms in the programmable controller. The input terminal is equipped with a
digital filter.
◼ Input sensitivity
The input current of the programmable controller is DC24V 7mA, but for reliable operation, when it needs
to be turned on, it is more than 4.5mA, and when it is turned off, it is less than 1.5mA.