Interface - ITech IT-M3100D Series User Manual

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2.7.6 RS-485 Interface
When the optional interface card is a DB25 analog interface (IT-E1208) with
RS-485 interface, you can quickly understand the steps required to connect the
RS-485 interface.
The following figure shows a typical RS-485 interface system. Users can select
the RS-485 interface converter to connect to your computer according to the ac-
tual situation, for example: RS-485 to RS-232 interface device or RS-485 to
USB interface device Etc., the RS-485 to USB interface device is taken as an
example.
Definition of RS-485 Pins
RS-485 interface pins are integrated in the DB25 analog interface. Pin25 and
Pin13 are the A and B pins for RS-485. Refer to
information.
RS-485 Configuration
The user needs to configure the RS-485 interface parameters in the system
menu before using the remote control. The RS-485 interface parameters are as
follows.
PC and power supply must have the same baud rate.
Ensure you have used the correct communication cable. Please pay atten-
tion that some cable may not have a correct internal wiring even it is with an
appropriate interface.
The cable must be connected to the correct serial ports (COM1, COM2, etc)
of PC.
The rear panel shown in the figure is only an example. The actual appear-
ance of the rear panel is subject to the specific instrument.
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Inspection and Installation
Analog interface for more
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