Specifications

6-2
MS-120X and MS-220X Integration Guide
Electrical Interface
Figure 6-1. MiniScan Connector
Table 6-1 lists the pin functions of the MS-2204VHD.
Table 6-1. MS-2204VHD Electrical Interface
Pin
No.
Pin Name Type* Function
1Trigger I Signals scanner to begin scanning session.
2TXD OSerial data transmit output. Drives the serial data receive input on the
device communicating with the scanner.
3RXD I Serial data receive input. Driven by the serial data transmit output on
the device communicating with the scanner.
4 Not used
5Ground Power supply ground input and signal ground reference.
6Power I 5.0 VDC ± 10%
7CTS 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.
8RTS ORequest-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.
9Beeper/
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