Communication Specifications - OE Max Controls NX7-28ADR Manual

Communication Specifications

COM1 comm. port
9-pin female
D-Sub
COM2 comm.
port 8-pin
female RJ45
Item
COM1: RS-232C or RS-485, 9-pin D-Sub
Interface
COM2: RS-232C or RS-485, 8-pin modular
38400, 19200, 9600, and 4800,
automatically selected
Baud rate
(But, the speed is limited for COM2
user-defined communications)
Protocol Half duplex asynchronous polling
Data bit 8 bits
Parity None
Stop bit 1 bit
Communication RS-232: 15 m or less, RS-485: 1.2 Km or
distance less
COM1: adjusted by the internal DIP switch
Termination
COM2: external user wiring
resistance
(150 recommended)
Transmission cable Twisted pair cable (Shielded cable)
PLC Port1 (CoM1)
(9-pin female D-sub)
1
2
3
4
5
6
7
8
9
Use NX_CBLCPU2 or NX_CBLCPU5 cable from your personal computer's
IMPORTANT
serial port to COM1 port. See NX7 Controllers User Manual for more
information about wiring.
RS232/RS485
selector switch
Specifications
NC
TXD
RXD
RTS
GND
485-
485+
The terminals #1 and #3, and
#2 and #4 are connected
CTS
internally, respectively
Vcc
Status LED
(Flashes during communication)
COM1 switch settings
Termination
resistence setting switch
Remarks
DIP switch
Automatically recognized (wiring
method)
Reset after pausing
communication, for more than
one minute, to change the speed.
PLC Port2 (CoM2)
(8-pin female RJ45)
No
1
2
3
4
5
6
7
8
Signal
485+
485-
485+
485-
Reserved
Signal GND
232C/RXD
232C/TXD
15