Description; Important Notice; Interface; Optional Rs485 Board - Trumeter 898X Serie Manual De Instrucciones

1 Description

These operating instructions describe the optional
RS485 interfaces and their protocols.

2 Important notice

Read both these operating
instructions relating to the
optional interfaces and the
operating instructions of the
basic device before operating
the device.

3 Interface

Signal lines are connected via 5 screw terminals
with a spacing of 3.5 mm.

3.2 Device connection recommended by the Modbus Organization [1]

Description
MODBUS
D0
D1
Common

3.1 Optional RS485 board

The RS485 interface allows a multipoint
connection. Up to 32 devices may be connected to
a bus segment.
Connections
The use of low-capacity and low-attenuation
twisted pair cable allows achieving extremely
reliable connections over long distances
(maximum 1000 m).
Device
B (-)
A (+)
Page 3 | ENG