Citizen · 80mm Thermal POS
Citizen CT-S310II 3" Thermal Receipt Printer
Fast, energy-smart 80mm receipt printing with USB and Serial (RS232) interfaces, built for Australian retail and hospitality counters.
80mm (3") width
Direct thermal
160 mm/s
USB + Serial
Auto-cutter
The Citizen CT-S310II is an 80mm direct thermal receipt printer designed for busy point-of-sale environments. With a 160mm/sec print speed, crisp 203 dpi output and a robust guillotine auto-cutter, it keeps queues moving at retail tills, cafe counters and hospitality stations. This USB and Serial (RS232) variant drops straight into both modern and legacy POS setups, while Citizen's Energy Star power supply and paper-saving features cut running costs receipt after receipt.
Why choose the Citizen CT-S310II
Fast 160mm/sec printing
Speeds through receipts so customers are not left waiting at the counter.
USB and Serial (RS232)
Dual interfaces connect to current PCs and older serial-based POS terminals alike.
Reliable guillotine auto-cutter
Full and partial cut with a 2 million cut durability rating for high-volume use.
Drop-in paper loading
Swap an 80mm roll in seconds with the clamshell top-loading mechanism.
Energy Star and paper-saving
Power-saving modes plus top-margin and line-spacing reduction trim paper and energy costs.
Barcode and 2D support
Prints GS1 DataBar and 2D codes, with built-in NV memory for logos and bitmaps.
80 / 58 mm
Paper width (3" / 2")
2M cuts
Auto-cutter durability
Built for the counter, day after day
Load an 80mm thermal roll, plug in via USB or Serial, install the driver and you are printing. The CT-S310II prints sharp receipts and barcodes at speed, cuts each receipt cleanly, and can fire a connected cash drawer through its drawer-kick port. Citizen's Long Life Print head and removable cutter mean less downtime and simple field servicing when volumes are high.
Specifications
| Brand | Citizen |
| Model | CT-S310II |
| SKU | CTS310IIURBL |
| MPN | TZ30-XXABX |
| Print method | Direct thermal |
| Print speed | Up to 160 mm/sec |
| Resolution | 203 dpi (8 x 8 dots/mm) |
| Paper width | 80mm (3") and 58mm (2"), switchable |
| Interfaces | USB and Serial (RS232) |
| Auto-cutter | Yes, guillotine (full and partial cut) |
| Cash drawer port | Yes, drawer-kick (peripheral drive) |
| Paper loading | Drop-in (clamshell top-load) |
| Barcodes | 1D, GS1 DataBar and 2D (incl. QR) |
| Colour | Black |
| Warranty | 24 months return to base |
How it compares
| Model |
Interfaces |
Print speed |
Best for |
| Citizen CT-S310II (this printer) |
USB + Serial (RS232) |
160 mm/s |
Single-till counters and legacy serial POS |
| Citizen CT-S310II USB/Ethernet |
USB + Ethernet |
160 mm/s |
Networked or multi-terminal POS |
Same CT-S310II printer, different interface configuration. Choose this USB/Serial model for direct or serial connections, or the USB/Ethernet version if you need to share the printer across a network.
What's in the box
- Citizen CT-S310II receipt printer (USB/Serial, black)
- USB cable
- Power supply
- Sample paper roll
- Quick start guide and warranty card
Frequently asked questions
What paper does the CT-S310II use?
Standard 80mm (3") direct thermal receipt rolls, with no ribbon or ink required. It can also be set to print on 58mm (2") rolls. We recommend quality 80mm x 80mm thermal rolls for everyday use.
Does it have an automatic cutter?
Yes. The CT-S310II includes a guillotine auto-cutter that performs full and partial cuts, rated to around 2 million cuts. The cutter is field-removable for quick maintenance.
Which interfaces does this version have?
This variant ships with USB and Serial (RS232) interfaces. If you need to connect the printer over a network instead, see the CT-S310II USB/Ethernet version.
Can it open a cash drawer?
Yes. The printer has a drawer-kick (peripheral drive) port so a compatible cash drawer opens automatically when a receipt is printed.
Do I need to install a driver?
For USB connection, install the Citizen driver before plugging the printer in. Connecting the USB cable first is the most common cause of a printer that will not print. Citizen drivers are available free from the Citizen Systems support site.
Will it work with my POS software?
The CT-S310II uses the ESC/POS command set and works with most POS systems. Some cloud POS platforms (for example Square) only support specific printer models, so check your POS provider's supported-hardware list or call us on 1300 026 062 before ordering.
Can it be mounted vertically?
Yes. The CT-S310II supports both horizontal and vertical positioning, so it fits neatly into space-tight counter layouts.
Where it works best
- Retail checkouts and single-till counters
- Cafe, bar and hospitality service points
- Legacy POS terminals that use a serial (RS232) connection
- Ticketing and order printing
- Space-tight counters needing horizontal or vertical mounting
Keep it stocked with 80mm thermal rolls
The CT-S310II runs on standard 80mm (3") direct thermal receipt rolls. Stock up so you never run dry mid-shift.
Shop thermal rolls
The Citizen CT-S310II (SKU CTS310IIURBL, MPN TZ30-XXABX) is an 80mm (3") direct thermal POS receipt printer with USB and Serial (RS232) interfaces. It prints at up to 160 mm/sec at 203 dpi, supports 80mm and 58mm thermal rolls, includes a guillotine auto-cutter (full and partial cut), a cash drawer-kick port, drop-in paper loading, GS1 DataBar and 2D barcode printing, NV memory, an Energy Star power supply and Long Life Print head, in black, with a 24-month return-to-base warranty. It suits retail checkouts, hospitality counters and legacy serial POS terminals.
Citizen · CT-S310II · CTS310IIURBL · TZ30-XXABX · 80mm direct thermal receipt printer · USB + Serial (RS232) · 160 mm/s · 203 dpi · auto-cutter · cash drawer port · POS Sales Australia · 1300 026 062
1300 026 062
