janitza UMG 604-PRO, User Manual And Technical Data

Page: 30 / 87

UMG 604-PRO
www.janitza.de
25
7. 3. 1 Termination resistors
The cable is terminated with resistors (120 Ohm
1/4 W) at the beginning and at the end of a segment.
The UMG604-PRO does not contain any termination
resistors.
Correct
Incorrect
Terminal strip in the cabinet.
Device with RS485 interface.
(without termination resistor)
Device with RS485 interface.
(with termination resistor on the device)
7. 3. 2 Cable type
CAT cables are not suitable for bus wiring.
Instead, we recommend the following cable
type:
• Unitronic Li2YCY(TP) 2x2x0.22 (from Lapp
Kabel)
The maximum cable length is 1200 m at a
baud rate of 38.4 k.
m m
WARNING!
Risk of injury due to electric
voltage!
Temperatures of up to 80 °C can occur on
the connections if there are high measured
currents.
Therefore, use lines that are designed for
an operating temperature of at least 80 °C