M2M CONTROL C660 - Technical Manual V2.00
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RS232 port 1 / programming port
This port can be used as general-purpose RS232 serial port or as a programming port. In order to
use the port for programming, the RS-DET pin must be connected to GND. When using the port as
general-purpose RS232, the RS-DET pin must be left unconnected.
X4: 6 pin SER1 connector overview
Pin
Name
Description
1
TD
Transmit Data from serial port 1, RS232 compatible
4
RD
Receive Data for serial port 1, RS232 compatible
2
RS-DET
Programming cable detect, normally unconnected
(if programming cable, connect to GND)
5
SGND
Signal Ground
RS232 port 2
The port is a general-purpose RS232 port with all control signals according to EIA-561 that defines
RS232 on a modular connector.
The signals are available on the RJ-45 connector located on the front panel of the C660.
Connector SER2: RJ-45 connector overview, fully RS232 compatible
Pin
Name
Description
1
DSR
Data Set Ready
2
DCD
Data Carrier Detect
3
DTR
Data Terminal Ready
4
SGND
Signal Ground
5
RD
Receive Data for serial port 2
6
TD
Transmit Data from serial port 2
7
CTS
Clear To Send
8
RTS
Request To Send