Datalogic Scanning Matrix 400 - Manual (Page 75)

19-PIN CONNECTOR ELECTRICAL CONNECTIONS
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5
5.4.1 RS232 Interface
The RS232 interface can be used for Point-to-Point, Pass Through or Master/Slave
connections. When it is connected to the host computer it allows both transmission of code
data and reader configuration by VisiSet™.
The following pins of the M16 19-pin connector are used for RS232 interface connection:
Pin Name Function
M TX Transmit Data
U RX Receive Data
N RTS Request To Send
T CTS Clear To Send
L GND Ground
It is always advisable to use shielded cables. The overall maximum cable length must be
less than 15 m (49.2 ft).
MATRIX
GND
RTS
CTS
RX
TX
USER INTERFACE
Reference Ground
Handshaking
Signals
TXD
RXD
SHIELD
L
N
T
U
M
K
Earth Ground Earth Ground
Chassis
Figure 76 - RS232 Main Interface Connections
The RTS and CTS signals control data transmission and synchronize the connected devices.
Figure 77 - RS232 Control Signals
If the RTS/CTS handshaking protocol is enabled, Matrix 400™ activates the RTS output to
indicate a message is to be transmitted. The receiving unit activates the CTS input to enable
the transmission.