The CT-1218 is an 8-channel digital input module from Sichuan ODOT Automation System Co., Ltd., a provider of reliable industrial I/O solutions for global markets.

Designed for 24VDC PNP/sink-type inputs, it accepts signals from dry contacts, active outputs, or 2-/3-wire digital sensors. Each channel features optical isolation between field inputs and the internal bus, an LED status indicator, and configurable signal filtering.?

The module supports input signal holding with adjustable hold time and includes a built-in 32-bit counter per channel (counting frequency <200 Hz) when used with a counting sub-module. Users can independently set counting mode, direction, filter time, and counter byte transmission order for each channel.?

General Parameters
Power Consumption	Max.52mA @ 5.0Vdc?
?Isolation	I/O to internal bus: opto-couple isolation (3KVrms)
Field Power?	Nominal:24Vdc, Range: 19.2-28.8Vdc
Wiring	Max.1.5mm2 (AWG 16)
Mounting Type	35mm DIN-Rail
Size	115*14*75mm
Weight	65g
Environment Specification
Operating Temperature?	-35℃~70℃
Operating??Humidity	5%~95% RH(No Condensation)
Protection Class	IP20
Input parameters
Channel Number	8 channel sink input
LED Indicator	8??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