
34
UMG 605US
m
Correct
Incorrect
Terminal strip in the control cabinet.
Device with RS485 interface.
(Without terminating resistor)
Device with RS485 interface.
(With terminating resistor at the device)
Terminating resistors
The cable at the start and end of a segment is
terminated with resistors (120 ohm, 1/4 W).
The UMG605US does not contain any
terminating resistors.
Shielding
A twisted-conductor and shielded cable must
be provided for connections via the RS485
interface. The shielding at both ends of the
cable must be connected to a large area of
the mounting plate or cabinet parts in order to
achieve an adequate shielding effect.
Cable type
Recommended cable types:
Unitronic Li2YCY(TP) 2x2x0.22 (Lapp cables)
Unitronic BUS L2/FIP 1x2x0.64 (Lapp cables)
Cable length
1200 m for a baud rate of 38.4 k
Important!
Profibus, RS232, RS485 and
temperature measurement input are
not metallically separated from each
other.
m
For the wiring of the Modbus con-
nection, CAT cables are not suit-
able. Please use the recommended
cables.
Содержание UMG 605US
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