Product Description

The Citizen CL-S621II is a rugged 4-inch industrial desktop barcode printer that combines Thermal Transfer (TT) and Direct Thermal (DT) printing in one compact, high-performance device. Designed for businesses that require durable, long-lasting labels as well as economical direct thermal printing, the CL-S621II is ideal for manufacturing, warehousing, retail, healthcare, logistics, and product identification applications. It delivers 203 dpi print resolution at speeds up to 6 inches per second while supporting ribbons up to 360 meters, minimizing downtime and increasing productivity.

Built with Citizen's proven Hi-Lift™ all-metal print mechanism, Hi-Open™ case, and ARCP™ (Automatic Ribbon Control Protection) technology, the CL-S621II ensures consistent print quality while reducing ribbon wrinkles. The CL-S621II-EPUBK includes Premium Ethernet, USB, and Serial connectivity, while the CL-S621II-EPUBK-C adds a factory-installed auto cutter for applications requiring automatic cutting of labels, tags, and tickets.

Key Features

• 4-inch Industrial Desktop Label Printer
• Thermal Transfer & Direct Thermal printing
• 203 dpi print resolution
• Print speeds up to 6 ips (150 mm/sec)
• Premium Ethernet (10/100 Base-T)
• USB 2.0 and RS-232 Serial interfaces
• Hi-Lift™ all-metal print mechanism
• Hi-Open™ vertical opening case
• ARCP™ Automatic Ribbon Control Protection
• Supports ribbons up to 360 meters
• Cross-Emulation™ for Zebra® ZPL®, Datamax®, EPL2®, and Citizen BASIC
• Adjustable gap, black mark, and notch sensors
• ENERGY STAR® certified
• Factory Auto Cutter available on CL-S621II-EPUBK-C

Ideal For

• Manufacturing
• Warehousing
• Distribution Centers
• Retail
• Shipping & Logistics
• Healthcare
• Pharmaceutical Labeling
• Asset Management
• Inventory Control
• Product Identification

Common Applications

• Shipping labels
• Product identification labels
• Barcode labels
• Compliance labels
• Inventory labels
• Shelf labels
• Asset tracking labels
• Warehouse location labels
• Healthcare labels
• Pharmacy labels
• Tags and tickets
• Durable thermal transfer labels
• Continuous media (Auto Cutter model)

Product Specifications

Available Models

Shopify Variant Structure

Media Handling

• Standard Tear-Off (CL-S621II-EPUBK)
• Auto Cutter (CL-S621II-EPUBK-C)

Print Method

• Thermal Transfer + Direct Thermal

Resolution

• 203 dpi

Connectivity

• USB + Serial + Premium Ethernet

Connectivity

Both models include:

• USB 2.0
• RS-232 Serial
• Premium Ethernet (10/100 Base-T)

Compatible with Windows®, Linux®, macOS®, and leading warehouse management systems (WMS), ERP platforms, shipping software, and barcode labeling applications.

Compatible Media

The CL-S621II supports a broad range of media, including:

• Thermal Transfer labels
• Direct Thermal labels
• Paper labels
• Polypropylene labels
• Polyester labels
• Shipping labels
• Barcode labels
• Product labels
• Compliance labels
• Asset labels
• Shelf labels
• Continuous media
• Tags and tickets

Compatible Ribbon Types

• Wax Ribbon
• Wax/Resin Ribbon
• Resin Ribbon

Why Choose the Citizen CL-S621II?

The Citizen CL-S621II offers the flexibility of both thermal transfer and direct thermal printing, making it a versatile solution for businesses with diverse labeling requirements. Its long-life ribbon capacity, rugged construction, enterprise networking, and automatic printer language emulation simplify deployment while delivering reliable, high-quality label production.

Benefits

• Print both durable and direct thermal labels
• Reduce downtime with 360-meter ribbon capacity
• Produce sharp barcodes and text
• Easy migration from Zebra® and Datamax® printers
• Premium Ethernet for reliable network printing
• Optional factory auto cutter for high-volume ticket and tag printing
• Rugged metal construction for years of dependable operation

Industries Served

• Manufacturing
• Warehousing
• Distribution
• Logistics
• Retail
• Healthcare
• Pharmaceuticals
• Food & Beverage
• Government
• Asset Management

What's Included

CL-S621II-EPUBK

• Citizen CL-S621II Printer
• Power Cable
• USB Cable (if supplied by distributor)
• Quick Start Guide

CL-S621II-EPUBK-C

• Citizen CL-S621II Printer
• Factory-Installed Auto Cutter
• Power Cable
• USB Cable (if supplied by distributor)
• Quick Start Guide