US Drives 3000-4220-4-4 (3000-2220 Rev B) PLC Add‑on Module

The US Drives 3000-4220-4-4 (also designated 3000-2220 Rev B) is an option card or expansion module for US Drives programmable logic controllers. US Drives was a manufacturer of industrial drives and control systems, and this module is typically used to add extra I/O points, analog channels, or fieldbus communication to a base controller. The module is inserted into an expansion slot of the main PLC unit and communicates over a proprietary backplane. It is commonly found in legacy motor control centers, conveyor control systems, and machine tool retrofits.

Typical Specifications

• Model Number: 3000-4220-4-4 (3000-2220 Rev B)

• Module Type: I/O or communication expansion

• Possible I/O Configuration:

• 8 digital inputs (24V DC, 5 mA)

• 8 digital outputs (transistor, 0.5 A)

• or 4 analog inputs (0‑10V, 12‑bit)

• or 2 analog outputs (4‑20mA)

• Communication: Possible RS‑485 for Modbus RTU

• Power Supply: 5V DC from backplane

• Operating Temperature: 0°C to 50°C

• Dimensions: 120 mm × 80 mm × 25 mm

• Connections: 2× 10‑pin header or screw terminal block

Functional Description

The module expands the I/O capacity of a US Drives PLC. It is configured via dip switches or software (depending on the base controller). Inputs are opto‑isolated and outputs are short‑circuit protected. The module includes status LEDs for power and activity. The 3000-4220-4-4 is a spare part for maintaining older automation systems where original components are no longer available.

Applications

Used in material handling systems, packaging machinery, and HVAC control panels. Also found in original equipment from manufacturers that integrated US Drives controllers.

Installation

Power down the PLC before inserting the module. Align the module with the expansion connector and press until latched. Secure with screws if provided. The base controller automatically detects the module. No additional programming is required for basic I/O mapping.

Conclusion

The US Drives 3000-4220-4-4 add‑on module provides a flexible way to increase the I/O count of legacy US Drives PLCs, extending the life of existing equipment.

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