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If you're looking for a rugged, precise barcode/label printer that delivers maximum performance, look no further...

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If you're looking for a rugged, precise barcode/label printer that delivers maximum performance, look no further. The CL-S521 direct thermal printer combines robust printing with superior price performance, ease of use and precision engineering. You'll love Citizen's unique metal Hi-Lift™ print mechanism, allowing for quick media loading while an adjustable sensor easily handles a variety of media and label configurations including standard and paediatric medical wristbands.

    Durable Direct Thermal Desktop Label Printer
    Metal print mechanism
    Citizen’s unique Hi-Lift™ design
    An adjustable media sensor efficiently handles unique label configurations
    Auto sensing between ZEBRA® ZPL® & Datamax® DPL™ emulation standard
    16 MB of DRAM and 4 MB of flash memory
    Complete connectivity with serial and USB standard.
    Optional internal Parallel or Ethernet interfaces are available.
    Internal power supply
    Label-making software included
    Optional peeler and cutter modules

Products available to purchase
SKU    Vendor    Name
CLS521G    CITIZEN    CLS-521 Direct Thermal Label 203dpi Printer Blk
CLS521CG    CITIZEN    CLS-521 Label 203dpi Printer /w Cutter Blk
CLSAC600B    CITIZEN    Autocutter for the CLS5xx/6xx Dark Grey
CLS6BETH    CITIZEN    CLS5xx/6xx/7xx Ethernet Interface (Basic Version)
CLP6ETH    CITIZEN    Ethernet Board for the CLP621/521
CLP6PEEL    CITIZEN    Peeler for the CLP\CLS 521\621\631
CAB-PR9F25M    GOODSON    Cable RS232 DB9F to Printer
CAB-IEC-C13    GOODSON    IEC-C13 Appliance Lead 2m (Kettlecord)
CAB-PRUSB    GOODSON    USB 2.0 A to B Cable
LAB100100TWS40P    GOODSON    Thermal Label 100x100x38 Perf
LAB100150TWS40P    GOODSON    Thermal Label 99 x 148 x 40 Perf

Printing Method
Direct Thermal
Printing Width
Max. 104 mm
Printing Length
Max. 812.8 mm
Dot Pitch
8 × 8 dots / mm (203 dpi)
Printing Speed (Max.)
Max. 15.2 mm/s - 6 ips
Datamax® emulation: Seven kinds of fixed pitch font, OCR fonts (OCR-A, OCR-B) *3, Proportional fonts, True type™ rasterizer
Zebra® emulation: Five kinds of fixexd pitch font, OCR fonts (OCR-A, OCR-B) *3, Proportional fonts, True type™ rasterizer *4
*3: The OCR font may have a low recognition rate according to the reader.
*4. It is equipped with UFST™ and TrueType™ raterizer that are licensed from Agfa Corporation.
Character Table/Code Pages
See User Manual (page 55 under Symbol set)
Bar-code Type
Datamax® emulation:
Code 3 of 9, UPC-A/E, EAN-13 (JAN-13), EAN-8 (JAN-8), Interleaved 2 of 5, Code 128, HIBC (Modulus 43-used code 3 of 9), Codebar (NW-7), Int 2 of 5 (Modulus 10-used Interleaved 2 of 5), Plessey, Case Code, UPC 2DIG ADD, UPC 5DIG ADD, Code 93, Telepen, ZIP, UCC/EAN128, UCC/EAN128 (for K-MART), UCC/EAN128 Random Weight, FIM, UPS Maxi Code, PDF-417, Data Matrix, QR Code, Aztec, RSS
Zebra® emulation: Code 11, Interleaved 2 of 5, Code 39, EAN-8, UPC-E, Code 93, Code 128, EAN-13, Industrial 2 of 5, Standard 2 of 5, ANSI CODABAR, LOGMARS, MSI, Plessey, UPC/EAN Extensions, UPC-A, POSTNET, Planet, Code 49, PDF-417, CODE BLOCK, UPS Maxi Code, Micro PDF-417, Data Matrix, QR Code, RSS, TLC39
Paper feed method
Friction Feed
Media Type
Roll, fanfold
(Continuous media, die-cuts media, continuous tags, copntinuous tickets)
Media width
Min. 19.5 mm to Max. 118 mm
Paper Roll Diameter
Max Ø 127 mm with 25.4 to 76 mm Core
Min. media core when using labels 50.8 mm
Media Tickness
Min. 0.0635 mm to Max. 0.254 mm
Auto Cutter
Optional quilotine Cutter
Power/Error LED (Green/Red)
LCD Panel
Power Switch
CITIZEN original language
Datamax® Programming language
Zebra® programming language
Auto detect
Flash ROM 4MB (User area: 1MB)
Datamax® emulation: SDRAM 16MB(User area: 1MB)
ZEBRA® emulation: SDRAM 16MB(User area: 4MB)
Transparent sensor, Reflective sensor& Label peeling sensor (if optional Peeler is used)
Standard with USB 1.1 (Full speed) & RS-232C (2400, 4800, 9600, 19200, 38400,57600,115200 bps) interface
Optional Ethernet or Paralllel IEEE1284 (compatible, Nibble, ECP mode) or Wireless Lan.
Driver available
Drivers by Seagull
Software Utilities
Bartender Ultralite
Power Supply
Internal 220-240V 50/60Hz
ENERGY STAR® qualified printer
Power Consumption
Max. 1.2A
External Dimensions (WxDxH)
231W × 289D × 186H mm
3.6 Kg approx.
Operating Environment
Temperature: 0 to 40 °C
Humidity: 30 to 80% (non-condensing)
Storage Environment
Temperature: -20 to 60 °C
Humidity: 5 to 85% (non-condensing)
EMC/Safety Standards
CE(EMC), GS Mark, FCC Class A, EMI, S-Mark, C-tick/RCM, CCC,UL, C-UL
2 year on Printer, 6 months on Printhead



Seagull Driver    13,873kb   CIT_7.3.3_M-0.exe
Seagull Driver    4,244kb


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