User’s Manual (M/N:SKR-3406) Sejin Electron Inc.
FCC NOTICE THIS DEVICE COMPLIES WITH PART 15 OF THE FCC FULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITION: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDERSIRED OPERATION. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
1. SCOPE This document provides a specification for the SEJIN standard USB keyboard. 2. MECHANICAL PERFORMANCE 2.1 Key switch Operation 2.1.1 Operating system Non - lock rubber tactile feeling. 2.1.2 Stroke 3.5±0.5mm with measuring load 200gf applied. 2.1.3 Operating Region Top end 0.8mm Total traval 3.5±0.5mm 2.0mm 0.7mm OFF region ON/OFF Swithing region ON region Bottom end 2.1.
2.4 Key top Height Variation The key top height variation must not greater than 0.5mm when measured between the center to center of keys next to each other. The measurement will be performed with keys in the home positions. 2.5 Keytop Alignment The key top alignment tolerances must not exceed 0.5mm when keytop measured between the center to center of keys next to each other. The measurement will be performed with keys in the home positions. 2.
3. WORKMANSHIP STANDARDS 3.1 Electrical Criteria Electrical assemblies and components shall meet the requirements of IPC-A610 and J-STD-001, Class-1. 3.2 Keycap Cosmetics The legend of keycap has to be printed with LASER MARKING methodology by SEJIN standard and will have to pass the Sejin abrasion test. 4. ELECTRICAL REQUIREMENTS 4.1 Operating voltage range DC 5V± 0.25 4.2 Operating current Max 100mA 4.3 Insulation resistance More than 100M ohm at 250V DC 4.4 Contact resistance 2KΩ or less 4.
when an impact of 10G has been applied to the package keyboard. The testing method shall be in accordance with 213B of MIL-STD-202E 5.4 Vibration The keyboard shall not be damaged electrically and mechanically when the following vibration has been applied to the packaged keyboard. The testing method shall be in accordance with 201A of MIL-STD-202E. Frequency: 10~55Hz Amplitude: 0.5mm Direction of vibration: Direction X, Y and Z individually Time of vibration: 2 hours 5.
The keyboard cable connects to the system with a USB connector. The following table shows the pin configuration and signal assignments.
