# Interface Card for Citizen CT-S600 / CT-S800 printers — Serial (TZ66801-0M)

**URL:** https://aio.lv/en/product--citizen-tz66801-0m--1003895
**Data updated:** 2026-02-12 09:42 (EET)
**Category:** Printer & Copier Parts
**Manufacturer:** Citizen
**Manufacturer code:** TZ66801-0M
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 30.49 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 25.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--citizen-tz66801-0m--1003895

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.99 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Serial interface card designed for Citizen CT-S600 and CT-S800 receipt printers (MPN TZ66801-0M). Provides a serial (RS-232) connection option to integrate the printer with POS systems, scales, or legacy devices. Intended for in-field installation into the printer’s expansion slot to add reliable wired serial communications for retail, hospitality, and industrial applications.

## Long description

The Interface Card for Citizen CT-S600 / CT-S800 printers — Serial (TZ66801-0M) is an add-on module that provides an RS-232 serial communication port for compatible Citizen receipt printers. Designed for in-field installation into the printer expansion slot, this card enables reliable wired connections to point-of-sale systems, scales, or other legacy equipment that require a standard serial interface. The module maintains factory fit and compatibility with the CT-S600 and CT-S800 mechanical and electrical configurations.
Advantages
This serial interface card delivers stable RS-232 communication with predictable latency and broad device compatibility. Installation into the printer expansion slot preserves the printer’s original form factor while adding a durable, wired connection option. The card supports common serial settings to simplify integration with POS software and peripherals and reduces dependency on USB or network adapters for legacy integrations.
Suitable for
 Retail point-of-sale systems requiring RS-232 connectivity
 Hospitality environments integrating receipt printers with legacy terminals or scales
 Industrial or kiosk applications where wired, low-latency communication is preferred
 Environments that need a direct serial link for diagnostic or control interfaces
Key specifications
 Interface type: RS-232 serial port
 Compatibility: Designed for Citizen CT-S600 and CT-S800 printers
 Installation: Fits printer expansion slot for in-field installation
 Connection: Standard DB9 or equivalent serial connector on card (cable-dependent)
 Electrical characteristics: TTL/RS-232 level compatible with standard serial peripherals
How to use
Power off the Citizen CT-S600 or CT-S800 printer and open the expansion slot cover following the manufacturer’s service instructions. Insert the serial interface card into the expansion slot, ensuring a secure seating and fastening according to the printer’s installation guide. Reattach any covers and power on the printer. Configure the printer’s interface settings via its setup menu or connected POS software to match the serial parameters of the host device (baud rate, parity, data bits, stop bits, flow control). Connect the serial cable between the printer and the host device and verify communication by printing a test receipt or using diagnostic commands.
Usage recommendations
Use shielded serial cables and proper grounding where possible to reduce electrical noise and prevent data errors. Match serial parameters on both devices before attempting data exchange. For long cable runs or electrically noisy environments, consider using shorter cables or placing equipment to minimize interference. Refer to Citizen printer documentation for detailed installation steps and safety precautions.

## FAQ

### How much does the Interface Card Citizen CT-S600 CT-S800 cost, and is it available for purchase?

The price is 30.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 20.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Citizen products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Citizen service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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