IC220MDL643 - 24 VDC Positive Logic 8 Points Input Module

SPECIFICATIONS:

Part No: IC220MDL643
Manufacturer: General Electric Fanuc
Product Type: 24 VDC Positive Logic 8-Point Input Module
Series: Series 90-30
Discrete Inputs: 8
Input Logic Type: Positive Logic
ON Voltage Threshold: 15–30 VDC
Input Current: 4–10 mA
Nominal input voltage UIN: 24VDC
Size: 8.83 x 3.58 x 4.7 inches
Operating Temperature: -25°C to +60°C
Mounting: DIN Rail / Panel
Protection: Over-voltage
Product Lifecycle: Discontinued By Manufacturer
Availability: In Stock
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

IC220MDL643 is a 24 VDC Positive Logic 8 Points Input Module manufactured and designed by General Electric as part of the Mark II Series used in GE Speedtronic Control Systems. The 24 VDC Positive Logic 8-Point Input Module is designed to interface discrete field devices, such as pushbuttons, limit switches, or proximity sensors, with a PLC or control system. It detects the presence of a 24 VDC signal on each of its eight input channels and converts it into a logic signal that the PLC can process, with a high voltage representing a logic “ON” and zero voltage representing a logic “OFF.” Each input typically features an LED indicator to provide visual status, allowing easy monitoring and troubleshooting. The module provides electrical isolation between the field devices and the PLC, protecting the controller from voltage spikes and noise. Compatible with standard 24 VDC industrial sensors, it reliably monitors multiple devices simultaneously while offering optional protection against overvoltage and short circuits, making it an essential component for industrial automation applications.

FUNCTIONS OF THE INPUT MODULE:

It provides a reliable bridge between field-level devices and PLCs, translating 24 VDC signals from switches, sensors, or pushbuttons into actionable logic inputs. With eight independent channels, it allows simultaneous monitoring of multiple devices, each indicated by a dedicated LED for instant status verification. Its positive logic design ensures that high voltage represents an active input, while low voltage is interpreted as inactive, streamlining control logic. Built-in electrical isolation and protection features guard against voltage spikes, short circuits, and electrical noise, ensuring long-term reliability. Compatible with most industrial sensors and controllers, this module is ideal for automation, process control, safety interlocks, and other industrial applications requiring precise digital input monitoring.

INPUT DESIGN OF POSITIVE LOGIC:

The input section of the 24 VDC Positive Logic 8-Point Input Module is designed for high reliability and precision in industrial environments. Each of the eight channels accepts 24 VDC signals from devices such as pushbuttons, proximity sensors, or limit switches and converts them into logic signals that the PLC can process. Positive logic operation ensures that a high voltage is interpreted as ON, while a low voltage is OFF. Electrical isolation and protective circuits shield the system from voltage spikes, noise, and ground faults, while integrated safeguards prevent overcurrent and overvoltage damage, ensuring stable and long-term operation.

SWITCHING THRESOLDS:

It provides a reliable interface between field-level devices and industrial control systems, allowing accurate digital signal acquisition. Equipped with eight independent input channels, it converts 24 VDC signals from pushbuttons, limit switches, and proximity sensors into logic states compatible with PLCs. Positive logic operation ensures that high voltage corresponds to ON, while low voltage represents OFF, with built-in switching thresholds and hysteresis preventing false triggering from voltage fluctuations or electrical noise. The module features LED indicators for each channel, electrical isolation, and protective circuits against overvoltage and short circuits, ensuring system safety and reliability.

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FREQUENTLY ASKED QUESTIONS:

What is the operating voltage range of the module?

The module operates on 24 VDC nominal input, with an ON threshold of 15–30 VDC and an OFF threshold of 0–5 VDC. This ensures reliable logic detection even under minor voltage fluctuations. It is compatible with standard 24 VDC industrial sensors.

Which sensors are compatible with the module?

The module supports a wide range of 24 VDC devices, including pushbuttons, limit switches, proximity sensors, and photoelectric sensors. Both sourcing and sinking sensor types can be connected depending on the wiring.

What is the expected lifetime of the module?

The module is rated for continuous industrial operation and typically exceeds 100,000 hours MTBF under recommended conditions. This ensures long-term reliability and minimal downtime.