Digital Input Modules
CT-121F: 16 Channel Digital Input/24VDC/ Sink Type
CT-121F：16 channel digital input/24VDC/ Sink type/The input high level is valid
Module features
- the module supports 16 channels digital input, supports sink input, and input voltage is 24VDC.
- the module can collect digital output signal of field equipment (dry contact or active output).
CT-122F: 16 Channels Digital Input/0VDC/Source Type
CT-122F 16 channels digital input/0VDC/Source type/Input 0V, the input low level is valid
Module features
- the Module supports 16 channels digital input, supports source input, the input voltage is 0V and the input low level is valid.
- the module could collect the digital output signal of field equipment (dry contact or active output).
CT-124H：32 Channels Digital Input/24VDC/Sink Or Source Type
CT-124H: 32 channels digital input, sink or source, 34Pin male connector, 24Vdc, counting function supported (counting frequency up to 200Hz)
- the module supports 32 channels digital input, it supports sink input and the input high level is valid as it could support PNP sensor; it also supports source input and the input low level is valid as it could support NPN sensor.