LEGRAND Raritan PX3-3000 Series, User Manual

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Chapter 4: Connecting External Equipment (Optional)
85
The beeper can be located at a distance up to 330 feet (100 m) away
from the PX3.
Connecting a Schroff LHX/SHX Heat Exchanger
To remotely monitor and administer the Schroff
®
LHX-20, LHX-40 and
SHX-30 heat exchangers through the PX3 device, you must establish a
connection between the heat exchanger and the PX3 device.
For more information on the LHX/SHX heat exchanger, refer to the user
documentation accompanying that product.
To establish a connection between the PX3 and LHX/SHX heat exchanger,
an RJ-45 to RS-232 adapter cable provided by Schroff is required.
To connect an LHX or SHX heat exchanger:
1. Plug the RS-232 DB9 end of the adapter cable into the RS-232 port
on the Schroff LHX/SHX heat exchanger.
2. Plug the RJ-45 end of the cable into the port labeled FEATURE on
your PX3 device.
To enable the support of the LHX/SHX heat exchanger, see
Miscellaneous (on page 447).
Connecting a Modbus RTU Device or Bus
If connecting the Modbus RTU devices to PX3 and enabling the Modbus
Gateway feature, the Modbus TCP clients on your network will be able to
communicate with those Modbus RTU devices attached to PX3.
To use the Modbus Gateway feature:
1. Connect a Modbus RTU device, or a Modbus bus with multiple RTU
devices, to the PX3 via two adapters described below.
a. Connect an isolated RS485-to-RS232 adapter to the Modbus RTU
device or Modbus bus.
b. Connect an RS232-to-USB adapter (using FTDI's FT232 chip) to
the RS485-to-RS232 adapter.
c. Connect the RS232-to-USB adapter to the USB-A port on the
PX3.
2. On the PX3, enable and properly configure the Modbus Gateway
feature. See
Changing Modbus Settings (on page 321).
Communications between Modbus TCP and RTU devices:

The PX3 acts only as a message gateway for the Modbus TCP client.
Messages from the Modbus TCP client(s) are passed through the PX3
to the connected Modbus RTU devices or Modbus bus.