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3 year warranty

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The D4-440DC-1 CPU is part of the DirectLogic 405 series produced by Automation Direct. The D4-440DC-1 model operates on 24 VDC and has two built-in communication ports. The model requires a 22.5K memory cartridge.



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  • Part Number: D4-440DC-1
  • SKU: D4440DC1AD
  • Manufacturer: Automation Direct
  • Series: DirectLogic 405

D4-440DC-1 Technical Specifications

Part Number D4-440DC-1
Series DirectLogic 405
Manufacturer Automation Direct
Product Type CPU
Ambient Humidity 5-95% non-condensing
Max Power 38 W
Input Voltage Range 20-29 VDC less than 10% ripple

Product Description

D4-440DC-1 is a central processing unit (CPU) module developed by Automation Direct. A member of the DirectLogic 405 series, this module can interface with all programmable logic controllers in the same series. No memory is built into the system, but separately purchased memory cards are available, such as D4-UV1 or D4-EE-2. The D4-440DC-1 is a DC-powered module with an input range of 20 to 28 VDC.

Built for fast boolean execution and optimal communication, D4-440DC-1 provides a user-friendly experience. Two communications ports are built into the module for programming and network connectivity. The first port exclusively provides a port for programming the module. A 15-pin input, Port 1 supports RS232 inputs with a 9600 baud. A variety of programming devices, including personal computers, handheld programmers, and other operator interfaces, are supported using this port. Port 2, conversely, is a slave-only input. A 25-pin auxiliary port, this connection supports RS232/422 inputs with user-selectable baud rates. CPU dipswitches allow the user to select the baud rate of the second port. The front of the module features a CPU key switch, allowing selections between RUN, TERM, and STOP. Six CPU status indicators are also found on the front plate. These indicators alert users to successful or unsuccessful PWR, RUN, CPU, BATT, I/O, and COM connections.

Be sure to follow all manufacturer-provided installation and storage parameters. All wiring and installation instructions and diagrams are easily accessible in the series manual and device datasheet. 

Frequently Asked Questions about D4-440DC-1

What is the D4-440DC-1?

The D4-440DC-1 is a DL405 Automation Direct CPU. It will connect with DL405 base models as well as I/O modules. 

Are there differences between the D4-440DC-1 and D4-440?

According to manuals from Automation Direct, there is a differentiation between the modules. One of the differences is the auxiliary power source current supplied; the D4–440 module has a supply of 400 mA while the D4–440DC-1 does not. Another difference between the modules is the weight; the D4–440 is slightly lighter at 31 ounces, while the D4–440DC-1 module comes in at 31.4 ounces. The voltage range of the two D4–440 modules also differ, the D4–440 base is in the range of 85-132 VAC with the D4–440DC-1 module having a voltage range of 20-29 VDC. 

What is the memory amount required on the D4-440DC-1?

The memory capacity required on the D4-440DC-1 module comes from the installed memory cartridge. The memory cartridge used on this module is 22.5K. 

Reviews For D4-440DC-1

Internal Review

While some DL405 modules can be used as stand-alone units, the D4-440DC-1 module must be used with other modules such as a base, I/O configuration, and I/O modules. Not only does this module have to be used with other DL405 units, but it must also be programmed. - AX Control Tech

Repair Services For D4-440DC-1

Type Lead Time Price Action
Repair Service 1-2 weeks $290

Our highly skilled technicians can repair your D4-440DC-1. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
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