
Be unique
CITIZEN CT-S251
Stylish and flawless POS printers
Chic
The CT-S251 is perfect 
for high class restaurants 
and boutiques where the 
environment requires 
a top class POS printer 
with eye-catching design. 
Choose between the 
white or black versions.
Fast
With its unique and 
stylish design, the twoinch CT-S251 POS 
printer is perfect for 
receipt or queue 
management systems. 
With a class-leading 300 
mm/s print speed, front 
exit and compact size, 
the CT-S251 blends 
performance and poise.
POS
Applications
• Receipts 
• Queue management 
• Weigh scales
• Coupons
• Daily reports
• Hospitality 
Well connected
Connectivity is key with the 
possibility for USB, Serial, MFi 
Bluetooth 
interfaces and toolkit support for 
iOS 
operating systems.That creates 
ideal conditions for easy 
integration.
®
, Ethernet and WiFi 
™, Android™ and Windows
®
CITIZEN SYSTEMS AMERICA CORPORATION • 363 VAN NESS WAY SUITE 404 • TORRANCE CA 90501 / USA • Tel: (310) 781-1460 • Fax: (310) 781-9152
Citizen Systems America

Easy to use
Thanks to the robust yet user friendly design,
the CT-S251 has quick and efficient
paper loading, preventing paper jams.
CITIZEN CT-S251
POS
Features & Benefits
Specifications
Model CT-S251
Printing method Line Thermal Dot Printing
Printing width 54mm/432 dots
Dot pitch 8 x 8 dots/mm (203 dpi x 203 dpi)
Number of columns Up to 36 digits (12 × 24: font A), Up to 48 digits (9 × 24: font B), Up to 54 digits (8 × 16: font C)
Printing speed Max. 300mm/sec., When greyscale printing: 130mm/sec
Line spacing 4.23mm (1/6 inch); adjustable by user comand
Barcode type
Emulation ESC/POS™
Width 57.5 +/- 0.5mm / 2.26 +/- 0.02in
Diameter 83mm / 3.27in or less
Paper
Power adapter 37AD2 (AC Adapter)
AC input voltage AC 100 to 240V, 50/60 Hz, 150 VA
DC operating voltage 24V DC ±7%, supplied by AC adapter
Weight 1.20 Kg / 2.65 lb
Dimension (W x D x H) 108 x 165 x 108 mm +5mm front lip / 4.25 x 6.49 x 4.25 in +0.2in front lip footprint
Operating environment +5 to 45°C / +41 to 113°F, 10%-90% RH, non condensing
Storage environment -20 to 60°C / -4 to 140°F, 10%-90% RH, non condensing
All product names are trademarks of the respective manufacturers. ESC/POS™® are trademarks or registered trademarks of Seiko Epson Corporation. Bluetooth® is a 
registered trademark of the Bluetooth SIG and WiFi is the registered trademark of the Wi-Fi Alliance. Android™ is a trademark of Google Inc., IOS™ is a trademark of Cisco 
Systems. Windows® is either a registered trademark or trademark of Microsoft Corporation. 
Designs, specifications and availability are subject to change without notice. Errors and omissions excluded.
Thickness 53μm to 85μm
Recommended Paper
UPC-A, UPC-E, JAN / EAN-8, JAN / EAN-13, ITF, CODE39, CODE93, CODE128, CODABAR (NW-7), PDF417, 
QR Code, GS1 Databar.
®
Mitsubishi Paper Mills P220AG normal type 65, HP220AB-1 highly conserved type 75, F230AA normal type 
65, P220AB normal type 85, Oji Paper PD150R normal type 75, PD160R high storage type 65/75, Nippon 
Paper TF50KR-2Y high storage type 62, TR50KJ-R high-save type 63
• Front Exit
• Fast 300 mm/sec 
• 2-inch media: 57.5 ± 0.5 mm
• MFi / iOS™ Bluetooth® version
• WiFi and Ethernet versions
• ENERGY STAR® power supply
• Stylish black or white case
• Same height as cash drawers
• Cash drawer connection
• ESC/POS™® compatibility
• SDKs for iOS™, Android™, 
 Windows
®
CITIZEN SYSTEMS AMERICA CORPORATION • 363 VAN NESS WAY SUITE 404 • TORRANCE CA 90501 / USA • Tel: (310) 781-1460 • Fax: (310) 781-9152
Citizen Systems America