UniOP ePAD05/06 Human Computer Interface

UniOP ePAD05 and ePAD06 Compact Human Computer Interface: Technical Depth and Engineering Practice

In the field of industrial automation, human-machine interfaces do not always require color touch screens. A large number of small and medium-sized equipment, such as packaging machines, injection molding machine auxiliary equipment, environmental testing chambers, and simple tooling platforms, place greater emphasis on the reliability of physical buttons, the coverage of communication protocols, and the overall economy of the machine. After successfully launching the ePAD03/04 series, UniOP further launched two products, ePAD05 and ePAD06. They significantly enhance operational capabilities while maintaining the same compact size and monochrome display specifications: 9 programmable function keys (with slide in labels), 10 user LED indicator lights, and provide more complete data traceability functionality (especially ePAD05 equipped with hardware real-time clock and recipe storage). EPAD06 serves as a further cost optimized version, suitable for pure display and control scenarios that do not require timestamps and recipe management. Some models support an extended operating temperature range (suffix -00B6 and -00B7) and can operate stably in harsh environments ranging from -20 ℃ to 60 ℃. This article will comprehensively analyze ePAD05 and ePAD06 from multiple dimensions such as hardware architecture, communication expansion, software functionality, installation size, on-site troubleshooting, and selection and replacement strategies, providing a practical technical reference for engineers who are currently using or planning to introduce this series of HMI.

Product positioning and model comparison

EPAD05 and ePAD06 are officially defined as the "ideal supplements" to ePAD03/04. Compared to ePAD03 (4 function keys, 5 user LEDs), ePAD05/06 has 9 function keys and 10 user LEDs, making it more suitable for operation stations that require frequent triggering of different actions such as start, stop, reset, manual/automatic switching, and parameter increment/decrement. The two share the same casing, display screen, and basic electrical parameters, with the core difference being the internal functional modules:

EPAD05: Full featured version. Equipped with hardware real-time clock (RTC, backed up with CR2430 lithium battery), 16KB recipe memory, 1024 alarm capacity, 256 event list, dual driver communication capability, UniNET network support (Server/Client mode).

EPAD06: Economic version. No hardware RTC, no recipe memory, reduced alarm capacity to 256, no event list, no dual driver communication (single driver only), UniNET only supports client mode.

From the suffix of the ordered model:

-0046: Standard operating temperature 0~+50 ℃

-00B6: Extended working temperature 0~+60 ℃

-00B7: Wide temperature version, working temperature -20~+60 ℃, storage temperature -20~+70 ℃

When selecting, engineers must choose ePAD05 if they need to record the exact time of operational events (such as for quality traceability or fault analysis), or if they need to store multiple sets of formula parameters, or if they need to connect two different protocol PLCs simultaneously. If only used for real-time data display and simple settings of a single PLC, and without timestamp requirements, ePAD06 can further reduce procurement costs.

Analysis of Hardware Technical Parameters

2.1 Display and Interaction

Both products use monochrome LCD with a graphic resolution of 120 × 32 pixels and an active display area of 70 × 21 mm, capable of presenting text of 4 lines × 20 characters. Supports downloadable fonts and scalable fonts, allowing display of characters in different languages and sizes, and supports 256 user-defined characters. The contrast is adjusted through software, and the LED backlight ensures readability in dark environments.

The configuration of physical buttons and indicator lights is a major highlight of ePAD05/06:

9 user programmable function keys: Each function key is equipped with a slide in label slot, allowing users to print paper labels for insertion and intuitively define key functions (such as "start", "stop", "parameter settings", "manual", etc.).

10 system keys: including directional keys (up/down/left/right), numerical input keys, confirm keys, exit keys, etc.

10 user programmable LED indicator lights: can be mapped to bit variables in the PLC, used to display motor status, valve in place, fault alarms, etc.

Four system LEDs: typically used to indicate power, communication activity, alarm status, etc.

A total of 19 physical buttons and 14 LEDs enable operators to quickly complete most control tasks without relying on screen menus, and are equally reliable in gloved or dimly lit environments.

2.2 Electrical and Environmental Parameters

Supply voltage: 18~30 VDC (nominal 24V DC)

Maximum power consumption: 0.25 A @ 24 VDC (approximately 6W)

Overcurrent protection: external or internal self recovery fuse (requires cooperation with overcurrent protection device)

Weight: Approximately 1 kg

Protection level: IP65 front panel (dustproof and water-resistant)