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Black thermal receipt printer with drop-in paper loading, auto-cutter, and USB serial ports

Citizen

Citizen CT-S4000RSU-BK Two-Color Receipt Printer 150 mm/s 203 dpi USB Serial 112 mm

SKU CH-7YF9-6EQ7J MPN CT-S4000RSU-BK

Prints two-colour thermal receipts at 150 mm/s with 203 dpi resolution and supports three paper widths up to 112 mm

  • ColorBlack
  • Print TechnologyThermal
  • Print Speed150 mm / sec
  • Max Resolution(B&W)203 dpi
  • Memory384K bytes
  • Fonts IncludedCharacter Size Font A: 1.25 x 3.0 mm (12 x 24 dots), Font B:
  • Two-color thermal printing highlights receipts and prescriptions
  • 150 mm/s print speed processes high-volume queues quickly
  • Drop-in 102 mm roll capacity reduces paper changes
  • Three paper widths (112, 82.5, 80 mm) fit diverse formats
  • USB and Serial interfaces with cable included connect instantly

Two-Color Thermal Receipt Printer

The Citizen CT-S4000RSU-BK is a two-colour thermal receipt printer designed for point-of-sale environments that need fast output and flexible paper widths. It prints at 150 mm/s with a resolution of 203 dpi and supports media widths of 112 mm, 82.5 mm and 80 mm. The unit includes an auto-cutter, internal power supply and dual USB and serial interfaces. A serial cable is supplied in the box.

Suited for High-Volume Counter Use

This model suits retailers, hospitality venues and healthcare sites that print high volumes of receipts, reports or prescription slips and benefit from two-colour highlighting and a large 102 mm roll capacity to reduce paper changes. It is not for operators who require wireless or network connectivity, mobile Bluetooth pairing or a compact mobile form factor for portable use.

Dual USB and Serial Interface

The single specification that decides fit is the dual USB and serial interface combined with three selectable paper widths up to 112 mm. Buyers needing Ethernet, Wi-Fi or a single fixed paper width should evaluate other models.

Highlights

  • Two-color thermal printing highlights receipts and prescriptions
  • 150 mm/s print speed processes high-volume queues quickly
  • Drop-in 102 mm roll capacity reduces paper changes
  • Three paper widths (112, 82.5, 80 mm) fit diverse formats
  • USB and Serial interfaces with cable included connect instantly

Specifications

BrandCITIZEN
ModelCT-S4000
ColorBlack
Print TechnologyThermal
Print Speed150 mm / sec
Max Resolution(B&W)203 dpi
Memory384K bytes
Fonts IncludedCharacter Size
Font A: 1.25 x 3.0 mm (12 x 24 dots), Font B: 0.88 x 2.13mm (9 x 17 dots), Font C: 0.88 x 2.00 (8 x 16 dots)
Character Table
Code page 437, 850, 852, 857, 858, 860, 863, 864, 865, 866, Katakana, WPC1252, Thai code 18
Barcode TypeUPC-A/E, JAN/EAN-8, JAN/EAN-13, ITF, Code 39, Code 93, Code 128, CODABAR, PDF417 (Label type only)
CutterAuto-Cutter
Media TypeThermal Paper
Media sizes supportedPrinting Width: 112 / 82.5 / 80 mm
InterfaceSerial / USB
Power SupplyDC 24V ±7%
Dimensions5.79" x 6.97" x 8.39"
Weight4.63 lbs.
FeaturesDirect Memory Access (DMA)
Two-color capable
Large capacity (102mm) drop-in paper loading
Can accommodate three different paper widths (112, 82.5, 80 mm)
Dual cash drawer kick-out
Internal power supply
Internal buzzer
Label version available (CT-S4000L)
Horizontal, vertical and wall mount options
Available in Black or White
Dual interface standard on ALL units (USB + serial, parallel or Ethernet)
ESC/POS Emulation
Ships with Windows 2000, XP, Linux, and OPOS drivers and Customization utility
Cable IncludedSerial Cable
Shipping weight0.91 kg
Package size244 × 178 × 147 mm

Questions about this item

How often will the auto-cutter need replacement on the CT-S4000RSU-BK?

The built-in auto-cutter handles continuous cutting of thermal paper rolls up to 102 mm diameter. No user-serviceable cutter module is specified, so replacement would require professional service if wear occurs after extended high-volume use.

What limits continuous printing speed on the CT-S4000RSU-BK during a full shift?

The printer sustains 150 mm/s (354.3 inch/min) with 384 KB buffer memory and DMA support. Thermal head cooling and paper roll capacity (102 mm) are the practical limits before a pause for roll change or cool-down.

How much heat and noise does the CT-S4000RSU-BK produce when running all day?

The internal 24 V DC power supply and thermal print engine generate moderate heat during sustained 150 mm/s output. An internal buzzer signals alerts; no fan is fitted, so acoustic output is limited to paper feed and auto-cutter actuation sounds.

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