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5. Installation and Wiring
5-7
RS-485 Communication Port
5.5.2.
■
RS-485 Communications Port Wiring
This product has four RS-485 communications ports for RS-485-connected measurement
devices. Up to 31 devices can be connected to one port.
Maximum transmission distance is 500 m for RS-485 communications.
For an RS-485 communications port cable, a shielded twisted-pair cable of AWG24 to14 (0.205
to 2.081 mm
2
) or higher must be used. To prevent malfunction, a shielded wire for the RS-485
communications cable must be connected to the ground or FG terminal.
This product has a built-in terminal resistor on each RS-485 communications port terminal. The
RS-485 cables must be wired so that this product should be on one end of the terminal. For a
device that is connected to the terminal end opposite to this product, a terminal resister of 120
Ω
(1/2 W) must be attached.
Precautions for
Correct Use
- The RS-485 cables must be wired through measurement devices in one loop. Branching
and/or star wiring is not available.
Maximum Transmission Distance of 500m
Up to 31 devices
Содержание EQ100-E
Страница 1: ...Sensor Network Server Model EQ100 E User s Manual Catalog No N196 E1 01H ...
Страница 55: ...2 Specifications 2 24 2 5 Dimensions Top View Front View Unit mm ...
Страница 92: ...7 EQ100 Settings 7 3 4 Click OK to view the EQ project setup menu Setting Menu ...
Страница 197: ...9 Web UI Function 9 24 3 In the Save As dialog box enter a destination to save and click Save Download is completed ...
Страница 255: ... MEMO ...