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The DirectLOGIC 405 PLC process control system from Koyo packs a lot of power for its size and price. It is one of our most powerful PLC applications. The DL405 PLC control system has the one of the widest varieties of I/O modules and configurations of all our DirectLOGIC PLCs. 


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Product Code Product Name QTY Price ($AUD) Action
PC-DS100 DirectSOFT 100 Free Programming SW 100 words
D4-454 CPU 31.5K (PID). Requires DirectSOFT programming software v6.1 or later
D4-454DC-1 CPU 31.5K (PID) 24Vdc Requires DirectSOFT programming software v6.1 or later
F4-CP128-1 Basic Coprocessor 128K
D4-04B-1 4 Slot I/O Base
D4-06B-1 6 Slot I/O Base
D4-08B-1 8 Slot I/O Base
D4-08NA 8 pt 110/220 Vac Input
D4-16NA 16 pt 110VAC Input
D4-16ND2 16 pt 12-24Vdc Source Input
D4-64ND2 64 Pt 20-28Vdc Sink Input
D4-32ND3-1 32pt 24Vdc Input
D4-16NE3 16 pt 24vac/dc Input
D4-16ND2F 16 pt 12-24Vdc Source Fast In
D4-08TA 8 pt 18-220VAC Output
D4-16TA 16 Pt 18-220VAC Output
D4-08TR 8 Pt Relay Output
D4-16TR 16 Pt Relay Output
D4-16TD1 16 pt 5-24VDC Sink Output
D4-16TD2 16 pt 12-24VDC Source Output
D4-32TD1 32 pt 5-24VDC Sink Output
D4-32TD2 32 pt 12-24VDC Source Output
D4-64TD1 64 pt 5-24VDC Sink Output
F4-08TRS-1 8 pt Isol Relay Output 10A
F4-08TRS-2 8 pt Isol Relay Output 5A
F4-04AD 4 ch Analog Input
F4-04ADS 4 ch Analog Input
F4-08AD 8 ch Analog Input
F4-16AD-1 16 ch Analog Input
F4-16AD-2 16 Ch Analog Input
F4-04DA-1 4 ch Analog Output
F4-04DA-2 4 ch Analog Output
F4-04DAS-1 4ch Analog Output
F4-08DA-1 8 ch Analog Output
F4-08DA-2 8 ch Analog Output
F4-16DA-1 16 ch Analog Output
F4-16DA-2 16 ch Analog Output
F4-08THM 8 ch Thermocouple Input
F4-08RTD 8 ch RTD
D4-EX Local Base Expander 110/220Vac
D4-EXDC Local Base Expander 24Vdc
D4-EXCBL-1 Expander Cable 1m
D4-EXCBL-2 Expander Cable 0.5m
H4-ECOM100 Ethernet Communications 10/100MB
H4-ERM100 Ethernet Remote Master 10/100MB
H4-EBC Ethernet Base Controller
D4-DCM Data Communications
D4-RM Remote Master Module
D4-RS Remote Slave Module 110/220Vac
H4-CTRIO High Speed Counter Module

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You can build a PLC controller system with local/distributed I/O of up to 3,500 points. Use the built-in PID instruction or specialty modules to perform cost-effective process control. 

How the PID PLC Application Works: 
PID (Proportional, integral, derivative) control: The control algorithm that is used to closely control processes such as temperature, mixture, position, and velocity. 

The proportional portion takes care of the magnitude of the error. 
The derivative compensates for the rate of error change. 
The integral takes care of small errors over time. 

The DL405 PLC controller system features include:

  • Three CPUs from 6.5 K memory with 1,152 I/O to 30.8 K memory with 3,584 possible I/O, with built-in power supply
  • Three base sizes
  • AC/DC in/out, up to 64 points
  • Ten amp relay out
  • 12-bit and 16-bit analog inputs and outputs
  • Thermocouple and RTD inputs
  • Data communications, including serial and Ethernet modules
  • High-speed counter input and pulse output
  • Serial remote I/O master and slave modules
  • Ethernet remote I/O master and slave base controllers
  • Slice I/O master and slave modules


Discrete modules in 8, 16, 32 and 64-point I/O densities

Use our ZIPLink pre-wired I/O cables and connector modules for easy wiring, especially to our 64-point DC modules.

Wide range of analog modules

Our analog I/O selection will give you the flexibility you need to perform low-cost process or data acquisition applications. We have 4, 8 and 16-channel models with input and output ranges such as 4-20 mA, 0-10 V, and bipolar ranges; isolated or non-isolated, 12 or 16-bit, thermocouple, RTD and millivolt modules. For example, our 8-channel F4-08AD analog input module offers eight channels of analog inputs and supports 4-20 mA, 0-20 mA, 0-5 V, 0-10 V, 1-5 V, +/-5 V, and +/-10 V (seven ranges) for a low price. For high-density analog, our F4-16AD-1 module supports 16 channels of current inputs at a low per-point cost. 

Specialty modules to complete the system

Applications requiring the DL405's power and I/O count usually have some sort of special interfaces. See details on these modules (all documents are .pdf format):

NOTE: New option modules may not be supported by CPUs purchased prior to the modules release. 
Be sure to check for the latest firmware for your PLC. You can refer to the module specification page on our Web site for this information, or find it in our free catalog. 
Here is the direct link to the Firmware Upgrade section of our Web site where you can find the firmware revision histories, the latest files and tools required to download the firmware into your CPU. 

For further details or specifications, select the desired product category and then select the "Products" tab and click on the product "Item Code" link, or select the "Technical Info" tab.

DirectSOFT5 (PC-DSOFT5) is our full-featured 32-bit Windows-certified programming package

It supports all five DirectLOGIC families of PLCs simultaneously, including all DL05s, DL105s, DL205 CPUs, DL305 CPUs, DL405 CPUs, and most of their Koyo cousins. 
It supports an incredible array of on-line/off-line programming and documentation features. Use the PID screens for fill-in-the-blank setup and loop tuning.