7.2Explanation of Input / Output signals

7.2.1Input / Output signals

(1)RD

Serial receiving data signal. On occurrence of framing error, overrun error, or parity error, the data is printed as "?".

(2) DTR

When this signal is READY, write data or a command. When they are written in BUSY, overrun error is occurred and data is ignored. Even during printing, data can be loaded in the input buffer. Further, BUSY can take place on supply of power, during test printing, during on-line, or on resetting.

(3) TD

When, while in data reception, the rest of input buffer on the printer side goes less than 128 bytes , DC3 (13H) data reception impossible signals are output.

When the rest of input buffer goes more than 256 bytes, DC1 (11H) data reception possible signals are output to the host. When DTR/DSR control having been selected in status

information transmission, it is first confirmed that DSR is "space" and data is sent. When DTR/DSR control has not been selected, DSR is ignored and data is transmitted.

(4) FG

Case GND

(5) GND

Common GND on the circuit.

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Citizen Systems CBM-291 user manual Explanation of Input / Output signals
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CBM-291 specifications

The Citizen Systems CBM-291 is a versatile and high-performance thermal printer designed for a wide range of printing applications. Known for its reliability and efficiency, this printer is particularly favored in environments requiring seamless ticketing, receipts, or labels.

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The printer offers a high-speed printing capability, with a maximum print speed of 200 mm per second. This ensures swift transactions, making it ideal for retail, hospitality, and transportation sectors where fast service is essential. Additionally, the CBM-291 boasts a resolution of 203 dpi, ensuring that all printed material meets professional standards.

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Another important characteristic of the CBM-291 is its user-friendly interface. The printer includes an easy-access paper compartment and a simple drop-in mechanism that allows for quick paper loading. This design minimizes downtime and enhances productivity by allowing users to change rolls quickly.

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In summary, the Citizen Systems CBM-291 combines advanced thermal printing technology, high-speed performance, versatile connectivity, and user-friendly features to meet the diverse needs of modern businesses. Its reliability and efficiency make it an excellent choice for any setting requiring dependable printing solutions.
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