Citizen CT-S310II Thermal Receipt Printer - Serial - USB - Black - CT-S310II-U-BK

The Citizen CT-S310II (Part # CT-S310II-U-BK) is a reliable, entry-level direct thermal printer designed for high-volume retail, hospitality, and service counter deployments. Built with Citizen’s "Eco-POS" design philosophy, it features ENERGY STAR® power conservation, halogen-free construction, and intelligent paper-saving modes that reduce paper consumption by up to 20%.

Out of the box, the CT-S310II comes equipped with a Dual USB and Serial (RS-232) interface, making it a versatile, future-proof replacement for standard POS terminal setups. With print speeds up to 160 mm/sec, drop-in paper loading, an integrated power supply, and an internal buzzer, this printer simplifies daily checkout operations while maintaining a low total cost of ownership.

Product Features:

Eco-Friendly Performance: ENERGY STAR® qualified with ultra-low standby power usage and a halogen-free printer housing.
Dual Standard Interfaces: Ships with onboard USB and Serial (DB9 RS-232) connectivity for flexible hardware compatibility.
Paper and Cost Savings: Built-in Paper Save features reduce receipt paper usage by up to 20%.
Long Life Print (LLP) Technology: Extends print head lifespan up to 200 km for long-term operational durability.
Integrated Power Supply: Features an internal AC power adapter to eliminate external power bricks and clean up counter clutter.
Easy Maintenance Auto-Cutter: Heavy-duty guillotine auto-cutter rated for up to 2 million cuts with simple jam release functionality.
Flexible Paper Widths: Accommodates standard 80 mm thermal paper rolls as well as 58 mm rolls.

Technical Specifications:

Manufacturer: Citizen Systems
Part Number: CT-S310II-U-BK
Model: CT-S310II Series
Color: Black
Print Method: Direct Thermal
Print Speed: Up to 160 mm/sec (6.3 ips)
Print Resolution: 203 x 203 dpi
Interfaces: Dual Interface: USB + Serial (RS-232C)
Paper Loading: Drop-in
Media Width: 80 mm / 58 mm
Max Roll Diameter: 3.15" (83 mm)
Cutter Lifespan: 2 Million Cuts (Guillotine, Full/Partial)
Print Head Life: 150 km (Up to 200 km with Long Life Print mode)
Cash Drawer Port: Controls up to 2 cash drawers
Dimensions: 5.51" W x 7.68" D x 5.20" H (140 mm W x 195 mm D x 132 mm H)
Weight: 3.97 lbs (~1.80 kg)

What's in the Box?

1x Citizen CT-S310II Thermal Receipt Printer - Black (CT-S310II-U-BK)
1x AC Power Cable
1x USB Interface Cable
1x 58 mm Paper Guide
1x Sample Paper Roll
Driver & Utility Installation Media