A7F OMRON | Alldatasheet
Document overview
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Technical content
SCSI Thumbwheel Switch A7F Conforms to SCSI (SCSI-2) and Ideal for ID Number Setting Use for External Hard Disks Connected to Computers Conforms to SCSI (SCSI-2) with 0 to 7 indication. Vertical and horizontal models designed to the mounting restriction of the applications. Compact, thin, and space-saving. Pen-push type which prevents against mishan- dling. No panel mounting plates required. Built-in connector terminal connects to any device with ease.
Ordering Information
Model A7F-241-1 A7F-241-1-1 Direction Horizontal Vertical Appearance Case color Black Output code BCD (with 8 positions) Operation method Pen-push type Enclosure rating IP50 Connector Use AMP’s 5-pole CT Connector. Name Model Contact Press-fit MT connector 173977-5 (White) --- 2-173977-5 (Light blue) 4-173977-5 (Cream yellow) 6-173977-5 (Black) Solderless connector 175778-5 175102-1 or 175161-1
Switching capacity 1 mA to 0.1 A at 5 VDC Carry current 1 A max. Contact resistance 1 Ω max. Insulation resistance 10 MΩ min. (at 250 VAC) between terminals of same polarity 100 MΩ min. (at 500 VDC) between each terminal and ground Dielectric strength 250 VAC, 50/60 Hz for 0.2 s between terminals of same polarity 1,000 VAC, 50/60 Hz for 0.2 s between each terminal and ground Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude Shock resistance 500 m/s2 (approx. 50G) min. Life expectancy Mechanical: 2,000 steps min. Electrical: 2,000 steps min. Ambient temperature Operating: –10°C to 70°C (with no icing) Storage: –20 °C to 80°C (with no icing) Ambient humidity Operating: 85% max. (with no icing or condensation) Max. operating force 3.43 N (350 gf) Operation Output Code Connector terminal no. 1 2 3 4 5 Switch terminal no. – C 1 2 4 Thumbwheel Position Indication Connection to C (COM) terminal 0 0 1 1 ON 2 2 ON 3 3 ON ON 4 4 ON 5 5 ON ON 6 6 ON ON 7 7 ON ON ON
Note: All units are in millimeters unless otherwise indicated. A7F-241-1 Panel Cutout Note: 1. When engaging the mounting hooks of the A7F with any panel mounting hole, the clearance of the panel mounting hole must not be 0.2 mm or more, otherwise the mounting hooks will not engage with the panel mounting hole. Make sure that the mounting hooks have engaged with the panel mounting hole securely before using the A7F. 2. Connect to AMP’s 5-pole CT Connector. Panel thickness A 0.5 to 1.5 mm 14.7±0.1 1.5 to 2.0 mm 14.9±0.1 A7F-241-1-1 Panel Cutout Panel thickness A 0.5 to 1.5 mm 14.7±0.1 1.5 to 2.0 mm 14.9±0.1 Dummy terminal (with no output) Label Suitable panel thickness: 0.5 to 2 mm (See note 2) (See note 2) Dummy terminal (with no output) Suitable panel thickness: 0.5 to 2 mm Label Note: 1. When engaging the mounting hooks of the A7F with any panel mounting hole, the clearance of the panel mounting hole must not be 0.2 mm or more, otherwise the mounting hooks will not engage with the panel mounting hole. Make sure that the mounting hooks have engaged with the panel mounting hole securely before using the A7F. 2. Connect to AMP’s 5-pole CT Connector.
Do not use the A7F in places where there is ammonia gas, chlorine, or sulfur dioxide. Do not put wet, oily, or dirty fingers on the operation switches of the A7F. Handling The molded components of the A7F use polyacetal resin and ABS resin. Carefully use alcohol to clean the molded component so that alcohol will not penetrate into the interior of the A7F. Do not use paint thinner to clean the molded components. Do not press the + and – push-buttons of the A7F simultaneously. Press the setting switch with the tip of a ball-point pen. Do not use pencil point or mechanical pencil point to press the setting switch, otherwise the lead of the pencil or mechanical pencil may be broken and A7F malfunctions may result due to fragments of the broken lead. Static electricity while touching the operating switch may damage the circuitry of the A7F. To protect the circuitry from static electricity, a protection circuit is required. Circuit Example Connect to each switch terminal Connect to the circuitry (100 Ω) Do not impose any force on the switch label side and the cover of the A7F, otherwise the A7F will need an operation force that is greater than normal or the push-buttons of the A7F will be locked. Do not impose external force on the top and bottom of the A7F as shown in the following illustration when mounting the A7F. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. Cat. No. A50-E1-1