Samsung SRP-350U, Руководство по обслуживанию

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2 Product Specifications
2-12
2-5 Interface Specifications
2-5-2-(c) Cable Connection
Figure 2-8 RS-485 Cable Connection
2-5-2-(d) Signal Description
Pin No. Signal Name Signal Direction Function
BODY Frame GND - Frame Ground
2 SD2 Output
3 SD1 Output
Transmit Data
“H” : SD1 > SD2, “L” : SD1 < SD2
4 RD2 Input
5 RD1 Input
Receive Data
“H” : RD1 > RD2 (RD1-RD2 0.2V), “L” : RD1 < RD2 (RD1-RD2 0.2V)
7 Signal GND - Signal Ground
8
9
DR2
DR1
Output
When DTR/DSR is selected, this signal indicates whether the printer is BUSY or
READY. (H/W flow control)
DR1 > DR2 (H) : The printer is BUSY.
DR1 < DR2 (L) : The printer is READY.
The host computer transmits a data to the host, after confirming this signal.
10
11
CS2
CS1
Input
When DTR/DSR is selected, this signal indicates whether the host computer is
BUSY or READY. (H/W flow control)
CS1 > CS2 (H) : The host computer is BUSY.
CS1 < CS2 (L) : The host computer is READY.
The printer transmits a data to the host, after confirming this signal.
Table 2-14 RS-485 Pin Description
=1> 4 ( *
4 12''5+5! '7,
(S.G) 1,7
(SD2) 2
(SD1) 3
(RD2) 4
(RD1) 5
(DR2) 8
(DR1) 9
(CS2) 10
(CS1) 11
1,7 (S.G)
2 (RD-)
3 (RD+)
4 (SD-)
5 (SD+)
8 (CS-)
9 (CS+)
10 (DR-)
11 (DR+)
PRINTER
SIDE
485 232
CONVERTER
XX1 = XX+
XX2 = XX-
1,7 (S.G)
3 (RXD)
2 (TXD)
5 (CTS)
6 (DSR)
4 (RTS)
20 (DTR)
HOST
SIDE
Samsung Electro-Mechanics