Description
Core Product Summary
The AutomationDirect EZ-S6C-K is a 6-inch color operator interface terminal designed for seamless integration with industrial automation control architectures. Part of the EZTouch product family, this panel features a 5.7-inch STN liquid crystal display with a 320 x 240 pixel resolution and a 128-color palette, providing clear visual feedback for machine and process control applications.
Engineering integration is anchored by built-in serial communication ports supporting legacy PLC drivers including K-Sequence, DirectNET, Koyo Modbus, and Think & Do. The unit operates on a 24 V DC power supply (with a 20 to 30 V DC operating range) and is built with 512 KB of standard system RAM, which is expandable via optional memory cards. Housed in a NEMA 4/4X indoor-rated front bezel, the unit includes a 48-cell resistive touch screen matrix and handles demanding industrial environments without requiring an internal Ethernet card.
Key Technical Specifications
| Parameter | Specification Value |
| Product Type | Color Touchscreen Operator Interface HMI |
| System Series | EZTouch 6-Inch Series |
| Display Type | 5.7 in. diagonal STN Color LCD (128-color palette) |
| Resolution & Pixels | 320 x 240 pixels |
| Touch Screen Type | Resistive touch grid, 48 cells (8 x 6 layout) |
| Central Processing Unit | Motorola ColdFire 32-bit CPU (40 MHz) |
| Standard User Memory | 512 KB System RAM |
| Memory Expansion | Upgradable to 1 MB or 1.5 MB total RAM via option cards; flash cards supported for backup |
| Screen Capacity | Up to 999 screens (application and memory dependent) |
| Serial Communication Ports | Computer/Program Port: RS-232C (9-pin D-sub); PLC Port: RS-232C, RS-422A, or RS-485A (15-pin D-sub) |
| Supported Protocols | K-Sequence, DirectNET, Koyo Modbus, Think & Do Modbus |
| Operating Voltage | 24 V DC nominal (20–30 V DC operating range) |
| Power Consumption | 15 W at 24 V DC |
| Front Enclosure Rating | NEMA 4, 4X (Indoor use only) |
| Operating Temperature Range | 0 to 45 °C (32 to 113 °F) |
| Dimensions (H x W x D) | 6.145 x 8.048 x 2.433 in. (156.08 x 204.41 x 51.79 mm) |
| Weight | Approx. 1.7 lbs (0.77 kg) |
| Certifications / Approvals | UL, cUL, CE |
Detailed Product Overview
The AutomationDirect EZ-S6C-K serves as a reliable human-machine interface designed to connect directly with industrial control systems via serial communication lines. Built around a 32-bit Motorola ColdFire processor running at 40 MHz, it processes operator inputs and updates graphic screens smoothly within machine automation cells. The 5.7-inch STN color screen provides distinct color zoning for alarm handling, operational states, and numeric data entries.
Integration into existing automation architectures relies heavily on its dedicated multi-protocol serial communication design. Because this specific model utilizes native serial links rather than onboard Ethernet, it acts as a direct drop-in replacement or control interface for legacy Koyo and DirectLOGIC PLC setups using K-Sequence or DirectNET. The front panel maintains a NEMA 4/4X seal when mounted correctly with its gasket kit, protecting internal components against incidental moisture, dust, and washdown spray in industrial floor environments.
Dimensions, Mounting & Connection Notes
- Physical Dimensions: Measures 6.145 in. High x 8.048 in. Wide x 2.433 in. Deep (156.08 mm x 204.41 mm x 51.79 mm). Installed depth behind the panel is approximately 2.3 inches.
- Panel Cutout: Requires a precision cutout matching the EZTouch 6-inch form factor, secured via integrated mounting studs and a 1/4-inch O-ring gasket to preserve the NEMA 4/4X seal.
- Wiring Connections: Power is landed on dedicated rear screw terminals accepting stable 24 V DC lines, keeping a clean separation from low-voltage communication cables to minimize electrical noise interference.
- Grounding: Terminal and protective ground (FG) must be tied to a low-impedance earth ground to satisfy industrial noise immunity standards (NEMA ICS 2-230 and ANSI C37.90a).
EZ-S6C-K
EZ-S6C-K
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Compatible Controllers | Koyo / AutomationDirect DirectLOGIC and compatible serial controllers | Communicates natively using K-Sequence, DirectNET, Koyo Modbus, or Think & Do Modbus drivers. |
| Communication Ports | 15-pin D-sub PLC port; 9-pin D-sub programming port | Requires correct cabling (such as EZ-2CBL variants) matching the specific PLC port pinout. |
| Power Supply | 24 V DC, 1.5 A recommended switching power supply | Operates within a 20–30 V DC range; stable external power prevents unexpected brownouts or resets. |
| Ethernet Support | None (Non-Ethernet base model) | Does not accept internal Ethernet communication cards; relies entirely on serial protocols. |
| Memory Options | 512 KB standard system RAM; expandable via option cards | Additional RAM or flash cards can be added if project screen counts and recipe data exceed baseline capacity. |
FAQ
What is the AutomationDirect EZ-S6C-K?
The EZ-S6C-K is a discontinued 5.7-inch color operator interface terminal from AutomationDirect’s EZTouch series, engineered for serial communication with industrial PLCs.
Which controller protocols does this HMI support?
It supports multiple native serial protocols including K-Sequence, DirectNET, Koyo Modbus, and Think & Do Modbus drivers.
Does the EZ-S6C-K support Ethernet networking?
No. This is a serial-only model and does not support internal Ethernet expansion cards.
What power supply requirements does it have?
It requires a 24 V DC nominal power source (operating safely between 20 and 30 V DC) with a switching power supply rated for at least 1.5 A.
What is the display specification of this unit?
It utilizes a 5.7-inch diagonal STN color LCD screen with a 128-color palette and a resolution of 320 x 240 pixels.
How is operator input handled on the panel?
Operator inputs are registered via a 48-cell resistive touch screen matrix arranged in an 8 x 6 grid layout.
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