User’s Manual (M/N:SKM-2040) Sejin Electron Inc.
FCC NOTICE THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. 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 describes the detail specifications for SEJIN’s SKM-2040 keyboard. 2. MECHANICAL SPECIFICATION 2.1 KEYSWITCH(MA-41) OPERATING SYSTEM : non-lock tactile back. TRAVEL AMOUNT : 3.8± 0.5mm with measuring load of 200gf applied. OPERATING FORCE : 60± 25gf LIFE : exceed 10 million operations. 2.2 KEY TOP The keytop pull out force shall be 0.5kg or more at normal temperature during initial state. The keytop shall be not pulled out by an ordinary typing operation. 2.
3. ELECTRICAL SPECIFICATION POWER SUPPLY VOLTAGE : +4.75 ~ +5.25V DC POWER SUPPLY CURRENT CONSUMPTION : 250Ma max SIGNAL INPUT VOLTAGE : -0.5 ~ +5.
OPERATION REGION Top end 0.8mm Total traval 2.3mm ON/OFF Switing 0.7mm ON Bottom end 4. CONFIGURATION The keyboard comprises the key swith section and signal processing circuit. The keyboard cable connects to the system with a 6-pin MINI DIN connector. The following table shows the pin configuration and signal assignments.
5. ENVIRONMENTAL CHARACTERISTIC AMBIENT TEMPERATURE AND HUMIDITY(operational) Temperature : 0 ~50˚ C Humidity : 85％RH (without condensation) ALLOWABLE AMBIENT TEMPERATURE AND HUMIDTY(storage) Temperature : -20 ~ +60˚ C Humidity : 95％ RH(without condensation) VIBRATION The equipment shall not be damaged electrically and mechanically when the following vibration has been applied to the package keyboard. The testing method shall be in accordance with 201A of MIL-STD-202E No.
