Lighthouse Worldwide Solutions REMOTE 1100, Руководство по эксплуатации

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Lighthouse REMOTE 1100/1104 Operating Manual
3-8 248083363-1 Rev 4
connect via an Ethernet LAN to the LMS 485 Gateway without any
adapters and communicate with the instrument through the Gateway .
RS-485 Communications
WARNING:
This
instrument will be
damaged and its
warranty voided if the
design of the RS-485 port
is defeated to allow daisy
chaining. The port is
designed for a star
configuration, only,
where the instrument is
the termination of a
single cable run between
it and a PC or hub.
The R1104 RS-485 port supports long distance multi-point RS-485.
The LWS USB-to-RS-485 Adapter cable may be used to connect a PC
USB port to an R1104 or to an RS-485 LAN.
The Modbus protocol provides a programming interface for multiple
devices on the same LAN. The RS-485 port allows easy connection
using standard CAT5e cable commonly used for office LANs. For a
detailed description of the Modbus registers and commands, please
refer to “Supported Modbus Commands” on page A-1.
Attaching the R1104 to an RS-485 LAN requires attention to the
topology (wiring scheme of network) before and after the design phase
to make sure the
R1104 and other instruments will perform as expected.
The R1104 must be used in a “star” or hub-based configuration. Do
NOT attempt to configure it for daisy chaining.
Use a standard CAT5e cable to connect the R1104 to the RS-485 LAN.
Table 3-2 illustrates the RS-485 RJ45 pins and the signals assigned.
R1104 RS-485 Port to PC USB Port
To use the R1104 RS-485 port to connect to a computer USB port, the
LWS USB-to-RS-485 Adapter cable must be used. Please contact a
Lighthouse Sales Representative for either the USB-to-RS-485
Adapter cable or USB-to-RS-232 Adapter cable kit.
Table 3-2 RS-485 RJ-45 Pinouts
RJ-45 Pin Signal Name
1 RS-232 - TX
2 RS-232 - RX
3 RESERVED for future use
4 RS-485B
5 RS-485A
6 RESERVED for future use
7 RESERVED for future use
8 GND