Symbol MiniScan MS-120X, Руководство по интеграции

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5-2
MS-120X and MS-220X Integration Guide
MS-2204 Electrical Interface
Figure 5-1. MiniScan Connector
Table 5-1
lists the pin functions of the MiniScan MS-2204 interface.
Table 5-1. MS-2204 Electrical Interface
Pin
No.
Pin Name Type* Function
1 Trigger I Signals scanner to begin scanning session.
2 TXD O Serial data transmit output. Drives the serial data receive input on
the device communicating with the scanner.
3 RXD I Serial data receive input. Driven by the serial data transmit output
on the device communicating with the scanner.
4 Not used
5 Ground Power supply ground input and signal ground reference.
6 Power I 5.0 VDC ± 10%
7 CTS I Clear-to-send handshaking input line, used only in conjunction with
the RTS line. Optionally used by another device to signal the
scanner to begin transmitting data.
8 RTS O Request-to-send handshaking output line, used only in conjunction
with the CTS line. Optionally used by the scanner to signal another
device that data is available to send.
9 Beeper/
Download I/O During normal operation this signal functions as an external beeper
drive line. This signal can sink 50mA of current to drive an external
beeper, and is normally pulled up. This signal is also used to begin
Flash Download operation when grounded externally during power
up.
*I = Input O = Output