MATRIX 450™ REFERENCE MANUAL
74
5
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 58 - RS232 Main Interface Connections
The RTS and CTS signals control data transmission and synchronize the connected devices.
Figure 59 - RS232 Control Signals
If the RTS/CTS handshaking protocol is enabled, Matrix 450™ activates the RTS output to
indicate a message is to be transmitted. The receiving unit activates the CTS input to enable
the transmission.
5.5.2 RS485
Full-Duplex
Interface
The RS485 full-duplex (5 wires + shield) interface is used for non-polled communication
protocols in point-to-point connections over longer distances (max 1200 m / 3940 ft) than
those acceptable for RS232 communications or in electrically noisy environments.
The following pins of the M16 19-pin connector are used for RS485 full-duplex
communication:
Pin Name
Function
M
TX+
RS485 Transmit Data (+)
N
TX-
RS485 Transmit Data (-)
U
RX+
RS485 Receive Data (+)
T
RX-
RS485 Receive Data (-)
L GND
Ground
Summary of Contents for Matrix 450
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