A flagship 300mm/sec front-exit POS printer for fast, demanding retail and hospitality counters.
80mm (3") paperDirect thermal300 mm/sFront paper exitAuto-cutter
The Citizen CT-S851II is a premium 80mm direct thermal receipt printer built for the busiest retail and hospitality point-of-sale counters. It prints at up to 300mm per second at 203 dpi, takes standard 80mm (3") thermal rolls up to an 83mm outside diameter, and uses a front paper exit with a spill-proof cover so it shrugs off moisture and foreign objects at wet, front-access counters. A high-contrast backlit LCD, a reliable guillotine auto-cutter and ESC/POS-compatible printing make it a fast, configurable flagship for high-volume venues. This unit is the base CT-S851II body (MPN CT-S851II3NABP); the interface board is selected and fitted separately, so you choose the connection that matches your till.
Why choose the CT-S851II
300 mm/s printing One of the fastest 80mm POS printers, clearing receipts even in a long queue.
Front paper exit Spill-proof cover and front exit guard against moisture and debris at the counter.
Reliable guillotine cutter Full and partial cut with a self-retracting snap-in design for longer cutter life.
Backlit LCD display High-contrast LCD plus colour LED makes setup, control and error checking fast.
Dual cash-drawer support Drives up to two cash drawers, so payment pops the till automatically.
Choose your interface Field-installable USB, Serial (RS-232C), Ethernet and Powered USB boards to suit your setup.
300
mm/sec print speed
80mm
(3") thermal paper
203
dpi resolution
83mm
max roll diameter
Built for high-volume, wet-area counters
Load an 80mm thermal roll, fit the interface board your till needs, install the driver and print. The front paper exit and spill-proof cover keep the printer safe at busy bar, cafe and quick-service counters, while 300mm/sec throughput and a reliable guillotine cutter keep the queue moving. The backlit LCD makes configuration and error checking quick, and ESC/POS-compatible printing means it talks to the POS software most venues already run.
Specifications
Brand
Citizen
Model
CT-S851II
SKU / MPN
CTS851IIBL / CT-S851II3NABP
GTIN (EAN)
4951319256205
Print method
Direct thermal (no ribbon)
Print speed
Up to 300 mm/sec
Resolution
203 dpi
Paper width
80mm (3") roll; supports 58 / 60 / 80 / 83mm
Max roll diameter
83mm outside diameter
Paper exit
Front exit with spill-proof cover
Interfaces
Base unit ships without interface; field-installable USB, Serial (RS-232C), Ethernet and Powered USB boards available (this SKU = standard without interface)
Barcodes
1D plus 2D / PDF417
Display
Backlit graphic LCD with colour LED indicator
Auto-cutter
Yes, guillotine (full and partial cut)
Cash-drawer port
Yes, supports up to 2 drawers
Emulation
ESC/POS compatible
Colour
Black (also available in white)
How it compares
Model
Form factor
Speed
Best for
Citizen CT-S851II
Front-exit 80mm thermal, spill-proof
Up to 300 mm/s
High-volume, wet-area retail and hospitality flagships
Citizen CT-S851II thermal receipt printer (base unit, no interface board fitted)
AC power cord
Power switch cover
USB cable
Interface cover
Sample thermal paper roll
Driver media and Quick Start Guide
Frequently asked questions
What paper does the CT-S851II use?
It uses standard 80mm (3") direct thermal receipt rolls up to an 83mm outside diameter, and also handles 58, 60 and 83mm widths. There is no ink or ribbon to replace. For most tills an 80x80mm thermal roll is the right fit.
Which interfaces does this unit have?
This is the base CT-S851II body (MPN CT-S851II3NABP), supplied standard without an interface board fitted. The CT-S851II accepts field-installable interface boards including USB, Serial (RS-232C), Ethernet and Powered USB, so you fit the connection your POS needs. Tell us your setup on 1300 026 062 and we will confirm the right interface.
Does it have an automatic cutter?
Yes. The CT-S851II has a built-in guillotine auto-cutter with full and partial cut, using a self-retracting snap-in design for reliable, long cutter life.
Can it open a cash drawer?
Yes. It has a cash-drawer (peripheral) port and supports up to two drawers, so a compatible cash drawer pops open automatically on payment.
Why front paper exit?
The front paper exit and spill-proof cover keep liquids and debris out of the mechanism, which makes the CT-S851II well suited to bar, cafe and quick-service counters where spills are common. It also lets you mount the printer in tight or under-counter spaces.
Will it work with my POS software?
The CT-S851II uses ESC/POS-compatible printing, so it works with most POS systems. Some cloud POS platforms (for example Square) only support specific approved printer models, so check your POS provider's supported-hardware list or call us on 1300 026 062 before you buy.
How do I set it up over USB?
Install the Citizen driver first, then connect the USB cable. Installing the driver before plugging in the printer is the single most common fix for a printer that will not print.
Where it fits
High-volume retail checkouts that need fast receipts with no queue lag
Bars, cafes and quick-service counters where spills are common (front exit, spill-proof cover)
Networked, multi-terminal POS sharing a printer over Ethernet (with the Ethernet interface board)
Flagship counters wanting a premium, configurable 80mm thermal printer
Don't forget the paper
The CT-S851II runs on standard 80mm direct thermal rolls. Stock up and keep every till printing.
The Citizen CT-S851II (SKU CTS851IIBL, MPN CT-S851II3NABP, GTIN 4951319256205) is a premium 80mm (3") direct thermal POS receipt printer printing at up to 300 mm/sec at 203 dpi, taking thermal rolls up to 83mm outside diameter and supporting 58, 60, 80 and 83mm widths. It features a front paper exit with spill-proof cover, a backlit graphic LCD with colour LED, 1D and 2D / PDF417 barcode printing, a guillotine auto-cutter with full and partial cut, support for up to two cash drawers, and ESC/POS-compatible printing. This SKU is the base body supplied standard without an interface; field-installable USB, Serial (RS-232C), Ethernet and Powered USB boards are available. It is black (also available in white).
Citizen CT-S851II · 80mm direct thermal receipt printer · 300 mm/s front-exit flagship · USB / Serial / Ethernet interface options · auto-cutter · ESC/POS · POS Sales Australia · 1300 026 062
Print Method: Direct Thermal
Resolution: 203Dpi
Print Speed: 300mm/second
Interface: Standard without interface
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Citizen
Citizen CT-S851II 80mm Thermal Receipt Printer (USB / Serial / Ethernet) - Black
1300 026 062
