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A7BS-255 Safety Light Curtain | F3SJ Series Industrial Safety Sensor

The Omron A7BS-255 is a thumbwheel (pushwheel) switch from Omron’s A7BS series . It features a Binary Coded Hexadecimal (BCD Hex) output with 16 positions (0 through 9, A through F), making it suitable for applications requiring hexadecimal data entry .

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Key Technical Specifications Parameter Specification Series A7BS Product Type Thumbwheel Switch / Pushwheel Switch Output Code Binary Coded Hexadecimal (16 positions: 0-9, A-F) Number of Positions 16 Number of Sections 1 Actuator Type Pushwheel Contact Rating 0.1 A at 50 VAC / 28 VDC (Resistive load) Maximum Continuous Current 1 A Minimum Applicable Load 1 mA at 5 VDC Display Character Height Hexadecimal: 3.2 mm (0.126") Contact Resistance 300 mΩ max. Insulation Resistance Between non-connected terminals: 10 MΩ min. (at 500 VDC) Dielectric Strength Between non-connected terminals: 600 VAC, 50/60 Hz for 1 min Mechanical Life 100,000 operations min. Electrical Life 50,000 operations min. Operating Force 5.39 N max. Operating Temperature -10°C to +65°C (with no icing) Storage Temperature -20°C to +80°C Operating Humidity 45% to 85% Termination Style Solder terminals / Card Edge Mounting Type Panel Mount, Snap-In (Front) Section Width 0.315" (8.00 mm) Depth Behind Flange 43.50 mm Body Dimensions (L x W x H) 38 mm x 22 mm x 24.5 mm Housing Color Light Gray Degree of Protection IP50 (dust-protected) Vibration Resistance 10 to 55 Hz, 1.5 mm double amplitude Shock Resistance 490 m/s² min.