CT-121F 16 channel digital input/24VDC/ Sink type
1 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).
*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 <200Hz.
*the module can set the digital signal input filtering time and the byte
transmission order of the counter.
*each channel of the module can set the counting mode and counting direction
independently.
2 Technical parameters
General parameters
Power Consumption  Max.60mA@5.0Vdc
Isolation  I/O to internal bus: opto-couple isolation (3KVrms)
Field Power  Nominal:24Vdc, Range:22-28Vdc
Wiring  Max.1.5mm2 (AWG 16)
Mounting Type  35mm DIN-Rail
Size  115*14*75mm
Weight  65g
Environment Specification
Operational Temperature  -40~85oC
Operational Humidity  5%-95% (No Condensation)
Protection Class  IP20
Input parameters
Channel Number  16 channel sink input
LED Indicator 16 channel input LED indicator
Turn-on voltage  Min.10Vdc to Max.28Vdc
Turn-off Voltage  Max.5Vdc
Turn-on current  Max.5mA/channel@28V
input impedance  >7.5kΩ
Input delay
OFF to ON: Max.3ms
ON to OFF: Max.2ms
filter time  Default 10ms
Sample frequency  500Hz
 
Counter frequency  <200Hz