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4-18 Input / Output MN1904
4.7.6 RS422 / RS485 - X14
If you will be using RS422 / RS485 and your PC does not have an RS422 / RS485 connector,
an RS232 to 4-wire RS422 / RS485 converter will be required. These commercially available
devices convert the signals from the PC RS232 port to the signals necessary for RS422 /
RS485 communications. Special care must be taken with the pin assignment on all RS422 /
RS485 devices, as this can differ between products. Connectors might need to be rewired to
provide the correct pin assignment.
Location
Top panel, connector X14
Pin Name
1 Shield
2 RX+ (input)
3 TX+ (output)
4 (NC)
5 GND
6 (NC)
7 TX- (output)
8 RX- (input)
9 GND
Description
RS422 / RS485 connections on a 9-pin male D-type connector
This port provides 4-wire RS422 / RS485 connections. The port can be used for multidrop
applications operating at 9600 or 19200 baud. The configuration can be changed using the
Mint keyword SERIALBAUD. It is stored in EEPROM and restored at power up.
Both the output and input circuitry are differential and operate between 0 and 5V.
Multidrop systems allow one device to act as a ‘network master’, controlling and interacting
with the other (slave) devices on the network. The network master can be a controller such as
a NextMove BX
II
, a host application such as WorkBench v5 (or other custom application), or a
programmable logic controller (PLC).
The NextMove BX
II
supports up to 15 devices, each having its own address (node) number to
uniquely identify it on the network. The address of the NextMove BX
II
can be configured using
the Mint keyword NODE. It is stored in EEPROM and restored at power up.
1
5
6
9