CT-121F：16 channel digital input/24VDC/ Sink type
◆ the module supports 16 channels digital input, supports sink input， and the
input voltage is 24VDC and the input high level is valid.
◆ the module can collect digital output signal of field equipment (dry contact or active output).
◆ the module can be accessed to 2-wire or 3-wire digital sensor.
◆ the internal bus and field input of the module use opto-isolator.
◆ the module supports the input signal holding function, and the holding time can be set.
◆the module carries 16 digigtal input channels with LED indicator on each channel.
◆ supports counting function, by adding counting sub-module.
◆ each input channel of the module supports a 32-bit counter with the counting frequency 7.5kΩ
Input delay -
OFF to ON: Max.3ms
ON to OFF: Max.2ms
filter time - Default：10ms