Citizen CL-S621II 4-inch thermal transfer desktop label printer, 203 dpi, USB and RS-232, black (CLS621IINEBXX) – front view

Citizen CL-S621II 4-inch thermal transfer desktop label printer, 203 dpi, USB and RS-232, black (CLS621IINEBXX) – angled view

Citizen CL-S621II 4-inch thermal transfer desktop label printer, 203 dpi, USB and RS-232, black (CLS621IINEBXX) – printing a label

Media Width and Thickness Adjustment for Citizen CL-S521/621 and CL-E720 Label Printers

Citizen CL-S621 Desktop Label Printer (CLS621IINEBXX)

Name: Citizen CL-S621 Desktop Label Printer (CLS621IINEBXX)
Brand: CITIZEN
SKU: cit621sw2
Availability: InStock

463,32 € +VAT

Product variants

Resolution (dpi)

203300

Series

CL-S621II front badgeStandard

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Available: In Stock
Vendor: CITIZEN
Type: Desktop Printers
Barcode: CLS621IINEBXX
Collections: Desktop Label Printers , GHS / CLP Chemical Label Printers , Label Printers , Shipping Label Printers

📄 Download Product Brochure (PDF)

CITIZEN

Citizen CL-S621 Desktop Label Printer (CLS621IINEBXX)

463,32 € +VAT

Description

Description

The Citizen CL-S621II (CLS621IINEBXX) is an industrial 4-inch desktop label printer for thermal-transfer and direct-thermal printing at 203 dpi and up to 150 mm/s (6 ips). Its all-metal Hi-Lift™ mechanism and Hi-Open™ case take 5" (127 mm) label rolls up to 118 mm wide on 1"–3" cores or fanfold media plus 360 m ribbons wound ink-in or ink-out, it speaks Zebra ZPL II and Datamax with automatic Cross-Emulation™ and connects via USB 2.0 and RS-232, with a slot for an optional Ethernet or Wi-Fi card. Built-in power supply; EU mains cord, sample ribbon and test labels are included.

📦 What's in the box – CLS621IINEBXX

✅ Citizen CL-S621II label printer – 203 dpi, thermal transfer + direct thermal
✅ Power cord – EU plug (Schuko); the power supply is built into the printer; no external adapter
✅ Media holder bar + media holder guide – for 5" (127 mm) rolls on 1"–3" cores inside the printer
✅ Ribbon holder + paper core (take-up) – for ribbons up to 360 m on 1" cores, ink side in or out
✅ Sample ribbon – a starter ribbon to try thermal-transfer printing
✅ Head cleaner – keeps the print head clean for sharp prints
✅ Test label media – for checking the set-up; order labels for your application separately
✅ Quick-start guide – drivers, SDK, utilities and BarTender label software are a free download (link in the guide)
❌ USB or RS-232 cable – NOT included – connect via USB 2.0 (type B) or RS-232; order a cable separately
❌ Production ribbons – NOT included – needed for thermal-transfer labels; see the compatible ribbons below
❌ Labels – NOT included – choose labels to suit your application (see compatible labels below)
❌ Cutter, peeler and network card – NOT included – optional extras; see the accessories below

⚠️ Please note: no USB or serial cable is in the box. To connect the printer to your computer, please order a USB A-to-B cable separately – e.g. the Bixolon USB-KAB-G – or use any standard USB 2.0 A-to-B printer cable.

💡 Useful extras: ribbons, e.g. Citizen 3330110 (wax, 110 mm × 300 m); the auto-cutter Citizen 2000424; the peeler Citizen 2000411; the 8-inch external roll holder Citizen 2000415 for 200 mm rolls; an internal Ethernet card (Citizen IF5-ES04) or Wi-Fi card (Citizen IF5-WF5S).

Key Features

Thermal transfer and direct thermal at 203 dpi – up to 150 mm/s (6 ips) in direct thermal and 100 mm/s (4 ips) in thermal transfer, max. print width 104 mm
360 m ribbons on 1" cores, 25.4–114 mm wide, ink side in OR out (switch-selectable) – wax, wax/resin or resin; ARCP™ automatic ribbon tension control
Industrial all-metal Hi-Lift™ mechanism with wide-opening head and Hi-Open™ vertical-opening case – easy loading without extra desk space
5" (127 mm) rolls on 1"–3" cores inside the printer, media 19.5–118 mm wide and 0.0635–0.254 mm thick, fanfold from the rear – 8" (200 mm) rolls with the optional external holder
Fully adjustable transmissive gap / notch sensor plus reflective black-mark sensor
Cross-Emulation™ switches automatically between Zebra® ZPL II® and Datamax® (DMX400 / I-Class), plus EPL2, CBI™ BASIC and Citizen commands – a drop-in replacement for existing printers
USB 2.0 and RS-232C as standard, plus an internal slot for an optional Ethernet, Wi-Fi or parallel card
Built-in power supply – no external adapter cluttering the desk; ENERGY STAR® compliant
Field-upgradable with auto-cutter or peeler; 16 MB Flash / 32 MB SDRAM

Ideal Applications

Manufacturing – rating plates, product, component and carton labels
Chemical and GHS / CLP labels on durable synthetic media
Healthcare and laboratories – specimen, test-tube and pharmacy labels
Logistics, warehousing and shipping labels
Retail – asset labels, EAN barcodes and shelf labels

All CL-S621II / CL-S631II Versions

The highlighted row is the version you are currently viewing.

Part Number	Model	Resolution	Print speed	Front badge
CLS621IINEBXX (this version)	CL-S621II	203 dpi	150 mm/s	CL-S621II	Viewing
CLS631IINEBXX	CL-S631II	300 dpi	100 mm/s	CL-S621II	View product
CLS631IINEBXX	CL-S631II	300 dpi	100 mm/s	CL-S631II	View product

Technical Specifications

Part Number	CLS621IINEBXX
Model	Citizen CL-S621II (CL-S621II / CL-S631II series)
Printer Type	4-inch industrial desktop thermal transfer label printer
Print Method	Thermal transfer and direct thermal
Resolution	203 dpi (8 dots/mm)
Print Speed	Up to 150 mm/s (6 ips) direct thermal; up to 100 mm/s (4 ips) thermal transfer or with the peeler
Max Print Width	104 mm (4.1")
Max Print Length	2,539.7 mm (99.99")
Media Width	19.5–118 mm (0.77"–4.65")
Media Thickness	0.0635–0.254 mm
Roll Diameter	Up to 127 mm (5") inside the printer; up to 200 mm (8") with the optional external roll holder 2000415
Core Size	25.4–76 mm (1"–3")
Media Types	Rolls and fanfold – die-cut labels, continuous media and tags; paper and synthetic thermal-transfer media or direct-thermal media
Sensors	Fully adjustable transmissive gap / notch sensor, reflective black-mark sensor, label-peeling sensor (for the optional peeler)
Ribbon	25.4–114 mm wide, max. 360 m, max. OD 74 mm, 1" (25.4 mm) core; ink side in or out (switch-selectable); wax, wax/resin or resin; ARCP™ automatic ribbon tension control
Interfaces	USB 2.0 full speed (type B), RS-232C serial (2,400–115,200 bps); internal slot for an optional Ethernet, Wi-Fi or IEEE 1284 parallel card
Wireless	None (optional Wi-Fi card IF5-WF5S / IF5-WF5L)
Memory	16 MB Flash (4 MB user area), 32 MB SDRAM (16 MB user area)
Printer Languages	Cross-Emulation™ (automatic Zebra® ZPL II® / Datamax® DMX400 & I-Class switching), Eltron® EPL2®, CBI™ BASIC interpreter, Citizen commands
Display	No LCD – 4 buttons and 4 status LEDs
Media Options	Tear-off as standard; optional auto-cutter (2000424) and peeler (2000411)
Drivers & Software	Windows driver, SDK, utilities and BarTender label software – free download
Power Supply	Built-in power supply: 220–240 V AC (−10%/+6%), 50/60 Hz, 1.5 A; ENERGY STAR®
Dimensions (W × D × H)	231 × 289 × 263 mm
Weight	Approx. 4.9 kg
Color	Black
Operating Temperature	0–40 °C, 30–80% RH (non-condensing)
Warranty	Printer 2 years; print head 6 months or 50 km
In the Box	Citizen CL-S621II printer (203 dpi, thermal transfer + direct thermal, built-in power supply), power cord (EU plug), media holder bar + media holder guide, ribbon holder, paper core (ribbon take-up), sample ribbon, head cleaner, test label media, quick-start guide; drivers, SDK, utilities and BarTender as free download – USB / RS-232 interface cable, production ribbons and labels NOT included

Only printing direct-thermal shipping labels? The Citizen CL-S521II needs no ribbon at all; for labels up to 168 mm wide, see the 6-inch Citizen CL-S6621. All CL-S621II / CL-S631II versions are listed above – compare other models in our Desktop Label Printers collection or contact our team for volume pricing.