Zebra DS8108 User Manual

SSI Interface 5 - 3
SSI Transactions
General Data Transactions
ACK/NAK Handshaking
If you enable ACK/NAK handshaking (the default), all packeted messages must have a CMD_ACK or CMD_NAK
response, unless the command description states otherwise. Zebra recommends leaving this handshaking
enabled to provide feedback to the host. Raw decode data and WAKEUP do not use ACK/NAK handshaking since
they are not packeted data.
Following is an example of a problem which can occur if you disable ACK/NAK handshaking:
• The host sends a PARAM_SEND message to the scanner to change the baud rate from 9600 to 19200.
• The scanner cannot interpret the message.
• The scanner does not implement the change the host requested.
• The host assumes that the parameter change occurred and acts accordingly.
• Communication is lost because the change did not occur on both sides.
If you enable ACK/NAK handshaking, the following occurs:
• The host sends a PARAM_SEND message.
• The scanner cannot interpret the message.
• The scanner CMD_NAKs the message.
• The host resends the message.
• The scanner receives the message successfully, responds with CMD_ACK, and implements parameter
changes.

Zebra DS8108 Specifications

General

Cables included	USB
Type	Handheld bar code reader
Wavelength	617 nm
Sensor type	LED
Scanner type	1D/2D
Tilt reading angle	0 - 360 °
Pitch reading angle	0 - 60 °
Linear (1D) barcodes supported	Codabar, Code 11, Code 128, Code 39, Code 93, GS1 DataBar Expanded, Interleaved 2 of 5, MSI, Plessey, U.P.C.
2D (matrix & stacked) barcodes supported	Aztec Code, Composite Codes, Data Matrix, Han Xin, MaxiCode, Micro QR Code, MicroPDF417, PDF417, QR Code, TLC-39
Input voltage	5 V
Power consumption	450 mA
Power source type	-
PC connection	RS-232/USB
Standard interfaces	RS-232, USB, Keyboard wedge
Connectivity technology	Wired
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	5 - 95 %
Product color	Black
International Protection (IP) code	IP42
Harmonized System (HS) code	84716070

Weight and Dimensions

Depth	107 mm
Width	66 mm
Height	168 mm
Weight	154 g