Citizen CL-S621II Desktop Label Printer

Citizen CL-S621II Desktop Label Printer

Dual-mode performance. Industrial reliability. Desktop footprint.

The Citizen CL-S621II is built for operations that can't afford downtime or poor print quality. Supporting both direct thermal and thermal transfer printing in a single unit, it eliminates the need for two separate machines — giving you maximum flexibility without compromising on output quality.

Speed and throughput that keeps up with demand

With print speeds of up to 6 inches per second (150mm/s), the CL-S621II delivers a typical courier label in under one second with virtually instant first-label output. For high-volume labelling environments — warehousing, logistics, retail distribution, or manufacturing — that speed directly translates to productivity gains on the floor.

Precision engineering, print after print

Citizen's ARCP anti-wrinkle and automatic ribbon tensioning system actively prevents ribbon misalignment and wrinkling — one of the most common causes of wasted labels and reprints. The result is consistently sharp, scannable output at 203 dpi, every time. Rolls up to 127mm OD are supported as standard, with an optional external media holder accommodating rolls up to 8 inches — significantly reducing media changeover frequency on high-volume runs.

Ribbon capacity that minimises downtime

Compatible with ribbons up to 360 metres in length, both inside and outside wound, the CL-S621II is designed to keep running. Fewer ribbon changes means less operator intervention and more uptime — critical in fast-moving fulfilment or production environments.

Seamless system integration

Cross-Emulation technology automatically switches between Zebra ZPL-II and Datamax command languages, making the CL-S621II a drop-in replacement or addition to virtually any existing label printing infrastructure — no costly software migration required. USB, serial, and Ethernet connectivity is available across the range, and the printer is fully compatible with Windows and macOS.

Compact, self-contained design

With an integrated mains power supply and a Hi-Open vertical lid mechanism that adds no extra footprint when open, the CL-S621II is engineered for tight workspaces without sacrificing access or usability.

Technical Specifications

Pair the CL-S621II with Earlsmere's range of direct thermal and thermal transfer labels for a fully optimised, ready-to-run labelling solution — backed by over 35 years of industry expertise.

Data Sheet