The Citizen CL-S621 (Model: JM40-M01) is a heavy-duty, industrial-grade desktop thermal label and barcode printer engineered for reliable, high-volume shipping, courier, and inventory labeling. Featuring dual printing technology, it supports both Thermal Transfer (using thermal ribbons for long-lasting prints) and Direct Thermal printing (no ink/ribbon required).
This unit is in used, fully working order and comes supplied with power and USB data cables, one loaded thermal ribbon (approx. 50% remaining), and one brand-new unpacked spare ribbon so you can begin printing immediately.
Dual Printing Modes: Operates in both Direct Thermal and Thermal Transfer modes to handle standard shipping labels or durable synthetic resin/wax barcode tags.
Hi-Lift™ Mechanism & All-Metal Chassis: Features Citizen’s clamshell mechanism that opens vertically for fast, easy media and ribbon loading.
Hi-Open™ Vertical Opening: Compact footprint designed to open straight up, saving valuable workstation desk space.
Crisp 203 DPI Resolution: Delivers sharp text, 1D/2D barcodes, and graphics at print speeds up to 4 inches per second (100 mm/s).
Dual Interface Connectivity: Built-in USB and Serial/RS-232 ports for easy integration with Windows workstations, POS terminals, and warehouse systems.
Cross-Emulation Support: Automatically switches between Datamax® and Zebra® (ZPL/EPL) command languages for plug-and-play network replacement.
| Attribute | Details |
| Manufacturer | Citizen Systems |
| Model | CL-S621 |
| Model Code / MPN | JM40-M01 |
| Printing Technology | Thermal Transfer & Direct Thermal |
| Resolution | 203 dpi (8 dots/mm) |
| Print Speed | Up to 4 ips (100 mm/sec) |
| Max Print Width | 4.1 inches (104 mm) |
| Media Width | 0.5 to 4.65 inches (12.5 to 118 mm) |
| Ribbon Capacity | Accepts standard 360m / 1-inch core ribbons (Inside/Outside wound) |
| Interfaces | USB 2.0 & Serial (RS-232C) |
Compatible with major shipping, e-commerce, and logistics platforms including Royal Mail Click & Drop, Evri, DPD, DHL, UPS, FedEx, eBay, and Amazon.
Drivers available for Windows, macOS, and Linux via Citizen's official support resources.
Status: Used – Tested & Working Order.
Physical Condition: Fully tested and operating properly. The outer casing exhibits light surface scuffs and cosmetic signs of normal office/warehouse use. The thermal printhead produces clean, clear barcodes and text without missing lines or streaks. Roller, ribbon spindles, and internal sensors are clean and intact.
1 x Citizen CL-S621 Thermal Label Printer (Model: JM40-M01)
1 x Mains Power Cable
1 x USB Data Connection Cable
1 x Thermal Transfer Ribbon (Pre-loaded, approx. 50% remaining)
1 x Brand-New Unpacked Spare Thermal Transfer Ribbon
Setup Ready: Comes complete with all necessary cables and two ribbons, allowing for immediate setup right out of the box.
Setup Note: Ensure you install the appropriate Citizen or Seagull Scientific Windows driver for the CL-S621 before plugging in the USB cable for automatic device recognition.