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Programmable Logical Controllers KOYO.

PLCsWe independently developed the KOSTAC PLC, a workplace-oriented stage-type programmable controller, and are providing this easy-to-use product to customers around the world. An identical-concept SFC programming method is used in PLC IEC/JIS standards, testifying to the international recognition of its superiority. Now is truly the information age, and we are providing variety of open network solutions to the worldwide customer through our global brand “Direct Logic PLC”.

AZ-C1 Series

AZ-C1 Series
Safety PLC based on universal standard

  • EN954-1 category 4
  • IEC61508 SIL3
  • ISO13849-1:2006 PLe 
  • CPU with built-in I/Os (8 in / 6 out)
  • Maximum 16 expansion modules available
  • Maximum 256 points I/Os
  • 16K words program memory
  • Two types of operation mode (programless/free program)
  • Combination program (safety control and general control) is available

DirectLOGIC 05

Small but powerful. Micro size high-performance PLC.

  • 3 type CPUs (Standard, Analog and sound type)
  • Maximum 8 expansion modules available
  • CPU with built-in I/Os (14 points maximum)
  • Maximum 142 points I/Os
  • 7.5K Words Program memory and 7.5 K Words Data memory 
  • 3 communucation ports available (2 ports at Standard type)
  • Includes 16 loop PID control

DirectLOGIC 05


DirectLOGIC 05

The DL05 series PLC offers with features you won't find in most bricks - 6 I/O combinations of AC, DC and relay I/O, and advanced programming functions such as PID and drum sequencing.
  • 8 inputs and 6 outputs
  • 2K program memory
  • 4K data memory
  • 2 communication ports
  • 129-instructions, including 4 PID loops
  • Removable terminal block
  • 12/24VDC powered versions
  • Discrete and analog I/O option modules
  • Thermocouple and RTD temperature input modules.
  • 1-channel high speed input/pulse output module(H0-CTRIO)
  • Memory cartridge/real-time clock option module
  • CUnet,DeviceNet™ slave,Ethernet,and Profibus option module

DirectLOGIC 06

DirectLOGIC 06

DL06 is our first micro PLC to combine its fixed I/O of 20 inputs and 16 outputs with four option card slots for expansion (discrete, analog, communication modules), all in the same package. With the DL06, you can use the same PLC panel layout for all applications from 36 to 100 I/O.
  • 20 inputs and 16 outputs
  • 7.5K program memory
  • 7.3K data memory
  • 2 communication ports,including built-in RS232/RS422/RS485 port
  • 229 instructions, including eight PID loops and ASCII
  • Removable terminal blocks
  • Built-in 3A 24VDC auxiliary power supply for field devices
  • 12/24VDC powered versions
  • Built-in real-time clock/calendar
  • Discrete and analog I/O option modules
  • Thermocouple and RTD temperature input modules.
  • 1-channel high speed input/pulse output module(H0-CTRIO)
  • Memory cartridge/real-time clock option module
  • CUnet,DeviceNet™ slave,Ethernet,and Profibus option module
  • Optional plug-in LCD display

DirectLOGIC 205

DirectLOGIC 205

If your application requires the flexibility of a modular control system, a DL205 PLC is the lowest cost, most versatile solution you'll find. Check out all our modules, bases and communication options.
  • AC/DC discrete input/output, up to 32 points per mobule
  • 10 amp relay out
  • 12-bit and 16-bit analog inputs and outputs
  • Temperature inputs(t/c and RTD)
  • Data communications, including CUnet,serial and Ethernet modules
  • Counter input/pulse output
  • Remote I/O master and slave
  • H2-CTRIO, 4-channel high speed counter/pulse output
  • H2-EBC, Ethernet slave base controller

DirectLOGIC 305

DirectLOGIC 305

The DL305 series is a small modular PLC that has been marketed by various name brand PLC manufacturers for over 20 years. This Koyo design revolutionized the small PLC market, and is still a good performer and a great value.
  • Three standard CPUs, including the D3-350 with PID control and two communication ports
  • 5, 8 and 10 slot bases
  • 110/220VAC or 24VDC power supply
  • AC, DC inputs
  • AC, DC, and relay outputs
  • 8 or 12-bit analog input/output
  • Specialty modules include ASCII/BASIC module, high-speed counter, and communication interface module

DirectLOGIC 405

DirectLOGIC 405

The DL405 product line packs a lot of power for its size and price. It has the widest variety of I/O modules and configurations of all our PLCs.
  • AC/DC discrete input/output, up to 64 points per module
  • 10 amp relay out
  • 12-bit and 16-bit analog inputs and outputs
  • Thermocouple and RTD inputs
  • Data communications, including serial and Ethernet modules
  • Counter input
  • Remote I/O master and slave modules
  • Ethernet I/O master and slave modules
  • New high-speed counter module
  • 16 PID loops built in, up to 96 with option modules

Terminator I/O Module

Terminator I/O Module
Terminator I/O provides you with an industrial I/O system with remote I/O, distributed I/O and digital I/O module capabilities. It combines the I/O points with their field terminations into a modular package to save panel space and money. With Terminator I/O, you can use distributed I/O nodes close to field devices for faster and more efficient wiring and troubleshooting.
Terminator I/O was custom-designed by Koyo (the same people who designed the original GE Series One PLC), a trusted name in control technology since 1983.
Network interface modules supporting Ethernet, Profibus, DeviceNET, MODBUS and Koyo remote I/O; some adapters include an on-board RS232 serial port.
  • Discrete and analog industrial I/O modules with modular terminal bases
  • Configuration flexibility by plugging together a network interface module with up to 16 I/O modules. 
  • Use local expansion for large I/O drops. No more confining I/O bases.
  • AC or DC power supplies. For high power systems, combine multiple supplies on a single I/O set.
  • Horizontal or vertical DIN rail mounting

DirectSOFT 5

DirectSOFT 5

Our powerful Windows-based DirectSOFT programming package is new and improved. With many new instructions, programming is now easier, quicker and more intuitive than ever. Improved viewing options and customizable tool bars make it easier to program and monitor your PLC system.
With DirectSOFT5, documentation can be exported for use in other applications such as our ViewJetCmore operator interface panels. User Interface Themes allow operators to create a unique look and feel for the DirectSOFT programming environment. The dockable window feature allows relocation of Cross Reference and Data views. The ability to auto-hide or even tear away views and place them outside the DirectSOFT5 work space optimizes full ladder viewing.
The product offering has been simplified to a full support PC-DSOFT5 package that programs all of our DirectLogic PLCs, and our new PC-DS100 package, which is a full-featured FREE programming package with a 100 word limitation. (DS100 is only available by download from our Web site)."

Handheld Programmers

Handheld Programmers
  • D2-HPP
  • D4-HPP
  • DirectView 1000 Text Panel
Handheld Programmers


Wiring Solutions Using the ZIPLink Wiring System. ZIPLinks eliminate the normally tedious process of wiring between devices by utilizing prewired cables and DIN rail mount connector modules. It's as simple as plugging in a cable connector at either end or terminating wires at only one end.

Signal Conditioners

Signal Conditioners

Signal integrity starts with quality measurement and good equipment. However, even with the best equipment signals can be degraded if the equipment is not properly installed or is not protected by signal conditioners. Signal integrity can be greatly impacted by poor shielding and wiring practices. The biggest factor is ground loop errors (ground noise). Our signal conditioner products protect your expensive electronic equipment against ground loops with up to 1500 V of isolation. 
Isolation is one way to eliminate ground loop errors caused by ground noise and other such problems. Isolation means using one of many electronic methods to interrupt the connections between two grounds while passing the correct signal with little or no loss of accuracy. Without a way for ground currents to flow, these currents can't induce signal errors.

Electronic counters

Single Preset
For Addition and Subtraction KCV Series total counters for addition and subtraction
Total Counters For Addition and Subtraction / Addition KCX Series preset counters
Multi-Counters KCM Series

KCV Series
Single Preset Counters for Addition and Subtraction /Total Counter for Addition and Subtraction
KCV Series
A preset counter that aggregates counts with functions that provide a large, two-color LED for display that is easy-to-read in a small DIN48x48 body. Dual output of predicted output and preset output can be set with settings for predicted output.
KCX-D Single Preset Green Counters for Addition
These counters feature an easy to read green LED screen to display one- to six-digit values, and operation modes and status. Advanced functions are also integrated, including dust insulation and power backup.
KCX-W Dual Preset Green Counters for Addition
These counters feature an easy to see green LED screen to display three to six digit counts and dual preset values. Other features include dust insulation and power backup.
KCX-T Total Counters with Green LED
The counters feature an easy to see green LED
screen. Other features include variable voltage and
power backup of 5,000 hours.
KCX-B Single or Dual Preset Counters for Fast Addition and Subtraction
The counter integrates 6-digit green LED display, and provides Add, Subtract and Compare options. I/O logic can be switched between positive logic and negative. The counter can be connected to either a source or sink I/O device.
KCX-T Fast Total Counters for Addition and Subtraction
In addition to counting in two directions, these counters can use negative values. They are displayed on the easy to see green LED screen. Available options include count disable, reset prevention and negative or positive input logic. The counter can be used for positioning a moving object as shown below.
KCM Series Multi-Counters
KCM Series
These counters can indicate tool replacement for machining centers, NC industrial machinery and the like as well as maintenance periods for multiple tools.
  • Tool management: Replacement notification/warning
  • Whetstones for grinding: Maintenance notification
  • Quantity management: Total counters/preset counters
  • Time management: Integration timers

Digital tachometers

Digital Tachometers
KOYO provides multi-function digital tachometers with eight operation modes to serve various purposes including the measurement of revolutions, speed, cycles, time difference, pulse time and intervals as well as integration.
There are eight different models, including small and reasonably-priced models used exclusively for the display of revolution counts and some models supporting log or digital output functions or comparator functions.

TC-V Series
TC-V Series
This tachometer is provided with a large display that is easy to read in a small DIN 48 body.
The bright character display is with a large red LED and a character height of 10 mm, which makes it easy to read from a distance and at an angle.

TC Series
TC Series
Based on a preset scale, the tachometer converts the number of revolutions to a distance, volume or production per unit time. The prescale function is not included in the TC-4L model.

High Precision
The cycle measurement is used in measurement format to obtain a high degree of precision at low speeds. Using a sampling technique, the tachometer ensures ample precision even at high speeds.

Digital timers

Digital Timers

The operation mode is selectable from ondelay, offdelay, one-shot, integration and flicker so that the timer can be used in various situations.
The front cover panel uses sheet keys with IP65 protection, so operation with wet or dirty hands can be done worry-free.
KT-V Series KT-V Series
A large display that is easy to read has been provided in a small DIN48 size.
The large red LED is bright with a character height for display of 12 mm, which allows it to be seen easily from a distance and at an angle.

Programmable cam switches

Programmable Cam Switches

Electronic cam switches are used in combination with encoders.
Designed to replace conventional radial plate cams and sensor-equipped timing cams, they improve the speed, precision and reliability of machinery operation.
FC Series FC2 Series
An embedded installation type, which enables checks to be done in a normal operating state with the control panel screen, is available as well as a wall-mounting type. There are three models designed for different scales of control. Various functions are provided such as timing, irregularity detection and a multi-purpose communication port.

Programmable displays

Programmable displays Koyo Programmable displays can be connected to our PLC as well as to almost all PLCs sold in Japan. Connection is easily – all you need to do is to set up the bit memory and registers required for your PLC model.

ViewJetCmore series
Programmable displays
GC-A Series
- TFT models from 7-inch WVGA
- Screen transfer: Ethernet / USB
- PLC connection: Ethernet / Serial
- Supports SD card
- Macro features
- Supports remote operation

ViewJetCmore series
Programmable displays
EA7 Series 
- Full line-up of TFT models from 5.7-inch to 15.0-inch
The 5.7-inch type has a STN black-and-white model.
- Screen transfer: Ethernet / USB
- PLC connection: Ethernet / Serial
- Screen storage media: Built-in memory
/Expansion CF
- Sound output: Equipped as a standard
(Excluding the EA7-S6M-RS, EA7-S6M-RS)
- Protection level: IP65

ViewJet GC Series
Programmable displays
GC-7 Series 
Inherited the GC-5 display.
- 10.4-inch TFT color : GC-76LC
- 5.7-inch STN color : GC-73LCL-R
- 5.7-inch STN monochrome : GC-73LM-R