Zebra DS457 User Manual

8 - 6 DS457 Fixed Mount Imager Integration Guide
Baud Rate, Stop Bits, Parity, Response Time-out, ACK/NAK Handshake
If you use PARAM_SEND to change these serial parameters, the ACK response to the PARAM_SEND uses
the previous values for these parameters. The new values then take effect for the next transaction.
Errors
The imager issues a communication error when:
• The CTS line is asserted when the imager tries to transmit, and is still asserted on each of 2 successive
retries
• Failure to receive an ACK or NAK after initial transmit and two resends.
Things to Remember When Using SSI Communication
When not using hardware handshaking, space messages sufficiently apart. The host must not communicate
with the imager if the imager is transmitting.
When using hardware handshaking, frame each message properly with the handshaking signals. Do not try to
send two commands within the same handshaking frame.
There is a permanent/temporary bit in the PARAM_SEND message. Removing power from the imager
discards temporary changes. Permanent changes are written to non-volatile memory. Frequent changes
shorten the life of the non-volatile memory.

Zebra DS457 Specifications

General

Type	Fixed bar code reader
Wavelength	655 nm
Sensor type	-
Scanner type	1D/2D
Optical sensor resolution	752 pixels
Standard interfaces	USB
Connectivity technology	Wired
Input voltage	5 V
Power consumption	450 mA
Safety	ETL, VDE, CETL, EN60950, Ctick, VCCI
Certification	FCC, RoHS
Product color	Black
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	-20 - 50 °C
Cables included	USB, VGA
Harmonized System (HS) code	84716070

Weight and Dimensions

Depth	58.4 mm
Width	62 mm
Height	29.2 mm
Weight	111 g