RRF installation and operating manual
RS422 / RS485 SERIAL CONNECTION
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5
Data + (positive)
6
Data - (negative)
Shield
Connect the cable to the terminal block inside the instrument.
Connect the shield at the point indicated.
The serial connection cable must be of the suited type for RS422/RS485 serial communica-
tion with one pair twisted for RS485 and the its shield.
The cable must not be channelled with other cables (for example outputs connected to con-
tactors or power cables), but must follow his own path.
USB CONNECTION
The USB cable is connected via the terminal block inside the instrument.
In the version with USB cable already wired, simply insert it into the port of the PC like a normal de-
vice.
1
+ 5 Vdc (VBUS)
2
Data - (negative)
3
Data + (positive)
4
GND
When using serial interface RS232/RS485, you can connect USB interface for PC program-
ming by using the terminal block inside the instrument, taking care to disconnect the serial
unit.
Pag. 9
As a result of a change, power cycle the instrument to
make the change effective.
