MS851 - Barcode scanners Unitech - Free user manual and instructions
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| Product Type | 1D Laser Barcode Scanner |
| Brand | Unitech |
| Model | MS851 |
| Dimensions (L x W x H) | 165 x 65 x 95 mm (6.5 x 2.56 x 3.74 in) |
| Weight | 150 g (5.3 oz) |
| Power Source | 5V DC via USB or RS-232 (power from host or external adapter) |
| Scan Engine | Laser diode, 650 nm visible laser |
| Scan Rate | 100 scans per second |
| Interface | USB (HID Keyboard, COM port emulation) and RS-232 serial |
| Readable Barcode Types | Code 39, Code 128, EAN-13, EAN-8, UPC-A, UPC-E, Interleaved 2 of 5, Codabar, etc. |
| Operating Distance | Up to 300 mm (11.8 in) for typical barcodes |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-4°F to 140°F) |
| Humidity | 5% to 95% non-condensing |
| Drop Resistance | 1.5 m (5 ft) onto concrete |
| Cleaning and Maintenance | Clean scanner window with a soft, lint-free cloth; avoid solvents; store in a dry place |
| Safety Certifications | Laser Class 1, CE, FCC |
| Spare Parts and Repairability | Replaceable cable and scan window; service through authorized Unitech service centers |
| General Information | Designed for retail, warehouse, and industrial applications; supports keyboard wedge and serial communication |
Frequently Asked Questions - MS851 Unitech
How do I connect the MS851 to my computer?
The MS851 can connect via USB or RS-232. For USB, simply plug it into a USB port; it will appear as a HID keyboard or virtual COM port depending on configuration. For RS-232, use the included serial cable and configure settings on your terminal.
What barcode types does the MS851 support?
It supports all common 1D barcodes including Code 39, Code 128, EAN-13, EAN-8, UPC-A, UPC-E, Interleaved 2 of 5, Codabar, and more.
How do I clean the scanner window?
Use a soft, lint-free cloth slightly dampened with water or a mild glass cleaner. Avoid abrasive materials and solvents. Gently wipe the window in a circular motion.
What should I do if the scanner stops working?
First, check the cable connection and power source. Try scanning a simple test barcode. If still not working, perform a factory reset by scanning the reset barcode in the user manual. Contact Unitech support if the issue persists.
Can I use the MS851 with mobile devices?
The MS851 is primarily designed for stationary or PC use via USB or serial. For mobile devices, you may need an OTG adapter for USB connectivity, but compatibility depends on the device's operating system and driver support.
How do I change the interface mode?
Scan the appropriate configuration barcode from the user manual to switch between USB HID Keyboard, USB COM Port, or RS-232 modes.
Is the MS851 drop-resistant?
Yes, it is designed to withstand drops from up to 1.5 meters (5 feet) onto concrete, making it durable for everyday use.
What is the warranty for the MS851?
Unitech typically offers a 1-year warranty against manufacturing defects. Please check with your reseller or Unitech for specific warranty terms in your region.
Can I program the scanner to add prefix or suffix characters?
Yes, the MS851 supports data editing. You can scan barcodes from the user manual to add prefixes, suffixes, or change the data format.
What should I do if the laser is on but no scanning occurs?
Ensure the barcode is in focus and within the scan distance (up to 300 mm). Also verify that the barcode type is enabled in the scanner's configuration. If the issue continues, perform a reset or contact support.
User questions about MS851 Unitech
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