Table of Contents
Advertisement
3.7.5
RS232C Serial Interface Connector
An RS232 serial interface connector is located on the rear panel on all models. Note that two
versions of the RS232 exist on the MX model series depending on the age of the unit. Older
models can be identified by the fact that they will not have a USB interface.
Pin
1
2
3
4
5
6
7
8
9
Pin
1
2
3
4
5
6
7
8
9
Table 3-8: RS232C Connector pin out – MX with RS232 but no USB
On MX models without a USB interface, a special RS232 cable is required to connect to a PC.
With these MX models, a special 13 foot / 4 meter long cable is supplied in the MX Series ship-
kit. The wiring diagram for this cable is shown below in case a longer cable has to be
constructed. Alternatively, a generic straight thru DB9 male to DB9 female cable can be used to
extend the supplied cable.
MX models that have both RS232 and USB interface use a more common straight through DB9
male to DB9 female serial cable, which is supplied in the MX ship kit for these models.
DB-9 PC
Pin
1
2
3
4
5
6
7
8
9
Figure 3-12: RS232C Cable for PC Connection wiring diagram – MX without USB.
50
Name
N/C
TxD
RxD
N/C
Common
N/C
CTS
RTS
N/C
Table 3-7: RS232 Connector pin out – MX with RS232 and USB.
Name
N/C
RxD, Receive data
TxD. Transmit data
DTR, Data Terminal Ready
Common
N/C
RTS, Request to Send
N/C
N/C
Pin
Direction
Direction
DTR, Data Terminal Ready
DB-9 AC Source
Direction
Description
1
output
reserved
2
input
Receive data(RxD)
3
output
Transmit data (TxD)
4
output
Data Terminal Ready (DTR)
5
-
Signal Ground
6
input
Data Set Ready (DSR)
7
-
no connect
8
-
no connect
9
output
reserved
Output
Input
C ommon
Input
Output
Output
Input
Common
N/C
Output
N/C
N/C
Advertisement
Table of Contents
