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Welcome

Heng Yu is a Hong Kong based company, with a strong R&D center in our Hong Kong headquarter and powered by our own modern production campus in Zhuhai (Guangdong, China). The two offices are linked up together by the world’s largest and amazing bridge over the sea.

Get In Touch

Email: info@hengyu-tech.com
Phone: +852 2394 1852
Address: Room 1503-05, NanFung Commercial Center, 19 Lam Lok Street, Kowloon Bay, HK

Our Location

852-2394 1852 info@hengyu-tech.com

S28A

Category:

Description

Main Features
  • 28 fully programmable keys, 4 * 7 matrix
  • Each key is made from the reliable Cherry MX key switches
  • Programmable functions are powered by the Matrix Maker
  • With internal strong metal plate to enhance the protection against ESD
  • Different relegendable keycaps (1 fold, 2 fold, Quad-fold) are available
  • Numeric profile keycaps are available
  • Bulit-in Cable with strong SR strain relief to protect the cable from being broken
  • Dual interface: PS/2 and USB

Programmable Features

  • Support Patented design of virtual touch screen simulation
  • Support firmware upgrade
  • All keys can be programmed with 255 characters
  • All data can be retained for no less than 100 years without additional battery
  • Does not require a TSR program and hence avoids application software crashes
  • Provides multi-level programming
  • Provides for a variable time delay in each programmed string
  • Provides true keyboard wedge function that operates with or without the normal computer keyboard connected
  • Provide a true Caps/Scroll/Numeric Lock function independent of any other keyboards being connected
  • Support PS/2 programming in DOS, all Windows of 32 bit versions 
  • USB programming through the USB HID interface, need not any keyboard drivers.

Technical Data

[Electronics]

Power Supply

  • PS/2: +5V/DC ±10%
  • USB: +5V/DC ±5%

Current input

  • PS/2: <100mA
  • USB: <100mA

[Mechanical Key Switch Version]

  • Total travel: 4 – 0.4mm
  • Pre-travel: 2 ± 0.6mm
  • Peak load before make: 60 ± 20cN
  • Key Stroke Life = 50 million

[Others]

  • Storage temperature: -40°C to +60°C
  • Operating temperature: 0°C to +50°C
  • Operating humidity: 20% to 90%
  • Dimension (LxWxH, mm): 176x109x40
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