The X4 is the third product of the streamlined Micro OCS Series of embedded I/O controllers. All units feature a built-in logic engine, operator interface, networking and I/O.

  • Virtual function keys slide in from the right on command
  • Designed with a streamlined set of onboard I/O
  • Capable processor speed and larger, intuitive user interface
  • Support for 4-20mA signals and RTD temperature sensors
  • USB mini-B onboard
  • High capacity microSD slot
  • RS232/RS485 serial port
  • CAN port (via RJ45)
  • Ethernet LAN port
  • Available in 2 models, model R and model A


The small, sleek profile of the X4 enables you to fit more in your panel, saving space and resources. The X4 packs a big picture into an overall small package. With just a 4.6” x 3.5” cutout, this 4.3” wide aspect screen is very friendly, intuitive, and clear.

In an effort to make implementing Horner OCS controllers as seamless and user-friendly as possible, we have selected a streamlined set of on-board I/O. The wide scope of digital and analog I/O make automating your applications, and your organization, as simple as the push of a (virtual) button. If the built-in I/O of the X4 isn’t enough for your specific application, you can easily expand via Ethernet, CAN, or serial.

In the market of fixed I/O, web-compatible controllers, the X4 is unmatched. Suited for most applications across a diverse range of industries, the X4 exceeds standards (and expectations). With powerful processor speeds, an intuitive user interface, and rugged durability, the suite of capabilities within the X4 are similar to our more established XL line of products.

With the addition of the X4 OCS controller, our engineers at Horner Automation have designed a slim, versatile, and complimentary product to our existing line of robust industrial solutions. The X4, when utilized as an introductory piece, empowers your organization to grow by seamlessly incorporating additional Horner solutions (such as our more basic X2 or premium X5 OCS controllers) to your expanding system.



Ladder Logic Memory 256kB
Logic Scan Rate 0.4 mS/K
Removable Memory microSD
Local Comment Storage Yes
Floating Point Support Yes
AutoTune PID Capable Yes
Display Technology LCD with LED 300 nits
Characters / Pixels 480 x 272
Character Height Selectable Fonts
Number of Pages 250 maximum 30 Objects per page
Backlight LED
OEM Faceplate Available No
Total Keys 5(on screen)
Function Keys 4(on screen)
Built-in I/O Points 26 (model R); 30 (model A)
SmartStix, SmartRail, SmartBlock I/O Support yes, CsCAN
Digital Inputs / Outputs, max 1024 / 1024
Analog Inputs / Outputs, max 256 / 256
General Purpose Registers (words) 5000 retentive
General Purpose Internal Coils (bits) 2,048 (1,024 retentive)
Total Active Ports 2
RS-232 Ports / RS-485 Ports RS-232 / RS-485 (1 of each)
PLC / Drive Protocols Limited
RTU / Modbus Master / Slave Yes
Serial ASCII In / Out Yes
USB Ports (A and Mini-B) Mini-B only
Integrated CAN Networks Standard
Supported CAN Networks CsCAN
Maximum CAN Distance 1,640 ft
Programming over CAN Yes
Height (mm) 3.53″ / 89.76
Width (mm) 4.69″ / 119.18
Depth (mm) 1.4″ / 35.8
Weight (kg) 0.27
Operating Temperature -10 to 60°C
Humidity (non-condensing) 5 to 95%
Product Certifications CE, C’
Environmental Rating IP66


Technical Documentation (Requires Login/Registration)
X4 User Manual Download
X4 Datasheet Download
Model A / R Datasheet Download
Model R-V20 Datasheet Download
Model R_V42 Datasheet Download
HE-X4 Quick Reference Guide Download
HE-X4R-V20 Quick Reference Guide Download
HE-X4R-V42 Quick Reference Guide Download
Electrical (DWG) Download
2D Mechanical (DWG / PDF) Download
3D Mechanical (STP / IGS) Download

On-Board I/O

Built-In Inputs/Outputs Model R Model A
DC In 12 12
DC Out 2 12
Relays 6 n/a
HS In 4 4
HS Out 2 2
mA In 4 4
mA Out 2 2

Note: There are four high-speed inputs of the total DC Inputs. There are two high-speed outputs of the total DC outputs.
Note: Model A supports sourcing outputs. Model R DC outputs are sinking with integral pull up resistors.


Remote I/O

Remote I/O available for this product includes:

CsCAN Based I/O
Modbus RTU Based I/O


Integrated CAN Networks 1 (RJ45 Red) – not isolated
Supported CAN Networks CsCAN
Integrated Serial Ports 1 x RS232, 1 x RS485

485 Terminations On-board, software controlled


CE Certified Download
UL Certification Download

Licenced Features

By the addition of a licence, Micro series X4, X7 and X10 can now support CANOpen and BACNet IP. Requires firmware 15.70 and at least Cscape 9.90 SP7

To purchase a licence, please contact [email protected]