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PROFIBUS-DP RS485 Installation / Pre-commissioning
TR-Electronic GmbH 2011, All Rights Reserved
Printed in the Federal Republic of Germany
Page 82 of 131
TR - ECE - BA - DGB - 0089 - 01
10/24/2011
In case of device type B, see Figure 2, the bus termination resistors also are already
installed inside the device. However, by the internal wiring it is defined that this device
type may be connected
selectively between two slaves
(B I) or
as last slave
(B II)
into the bus.
If the measuring system is to be connected as last slave into the bus, externally a
jumper must be established from TERM_A to Bus_A_OUT and from TERM_B to
Bus_B_OUT (B II).
Note on the nameplate
: “Termination Resistor OFF”
Stub lines (BII) represent a problem for PROFIBUS RS485 transmission
technology and should be avoided.
Figure 2: Type B, note on the nameplate
: “Termination Resistor OFF”