7 Special Circuit Descriptions
7-6
7-5 RS-485 Communication Block Diagram
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Figure 7-9 RS-485 Communication Block Diagram
Figure 7-10 RS-485 Waveform
TXD,RXD
CPU
M30624FGFP
DTR
CTS(Same as DSR)
SD1
SD2
RD1
RD2
DR1
DR2
CS1
CS1
TXD
RXD
DTR
CTS
RS-485 I/F BOARD
TRANSMIT (PRI NTER)
RECEIVE (PRINTER)
“H”
Transmission a data (1 Byte)
DATA
SD1
SD2
“L”
(+)Level
Gnd
(+)Level
Gnd
(+)Level (5V)
(+)Level (5V)
Received data (1 Byte)
RD1
RD2
Gnd
Gnd
A-B =
(-)Level
A-B =
(+)Level
A-B =
(-)Level
A-B =
(+)Level
A-B =
(-)Level
Samsung Electro-M
e
chanics
Summary of Contents for SRP-350U
Page 2: ...About Notes Precaution symbols Samsung Electro Mechanics ...
Page 4: ...Overview of this Receipt Printer Samsung Electro Mechanics ...
Page 7: ...1 Precaution Statements 8 6 0 A 6 8 9 8 4 8 8 1 3 Samsung Electro Mechanics ...
Page 8: ...1 Precaution Statements 1 4 MEMO Samsung Electro Mechanics ...
Page 26: ...2 Product Specifications 2 18 MEMO Samsung Electro Mechanics ...
Page 34: ...3 Installation and Operation 3 8 MEMO Samsung Electro Mechanics ...
Page 63: ...7 Special Circuit Descriptions 7 12 MEMO Samsung Electro Mechanics ...
Page 113: ...12 Block Diagram 12 2 MEMO Samsung Electro Mechanics ...
Page 115: ...13 Wiring Diagram 13 2 MEMO Samsung Electro Mechanics ...
Page 125: ... SAMSUNG ELECTRO MECHANICS Co Ltd January 2004 Printed in Korea ELECTRO MECHANICS ...