Newland NLS-EM2000, Руководство пользователя

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Chapter 2 Communication Interfaces
The EM2000 provides a TTL-232 interface and a USB interface to communicate with the host device. The
host device can receive scanned data and send commands to control the engine or to access/alter the
configuration information of the engine via the TTL-232 or USB interface.
TTL-232 Interface
Serial communication interface is usually used to connect the engine to a host device (like PC, POS).
When the EM2000 is connected to a host device through its TTL-232 interface, serial communication is
enabled by default. However, to ensure smooth communication and accuracy of data, you need to set
communication parameters (including baud rate, parity check, data bit and stop bit) to match the host
device.
The serial communication interface provided by the engine is based on TTL signals. TTL-232 can be
used for most application architectures. For those requiring RS-232, an external conversion circuit is
needed.
Default serial communication parameters are listed below, among which only baud rate can be altered.
Parameter Factory Default
Serial Communication Standard TTL-232
Baud Rate 9600
Parity Check None
Number of Data Bits 8
Number of Stop Bits 1
Hardware Flow Control None