MGE UPS Systems 100 Benutzerhandbuch

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34003602EN/AB
 - Page 19
2. Installation
Impedance matching and bias settings
If a specific adjustment is required on the RS485 link, see the settings on DIP switch SA1:
Switch number
1
2
3
4
Function
T+ to R+ connection
T- to R- connection
T+ 0V bias
R+ R- impedance matching
Switch number
5
6
7
8
Function
R+ 0V bias
T- +5V bias
T+ T- impedance matching
R- +5V bias
Default position
Master (fixed)
Two-wire link
Bias
Without impedance
matching
Example: SA1.6 = ON, T- has a +5V bias,
SA1.6 = OFF, T- does not have a +5V bias.
Settings
JBUS / RS485
PowerServices TelPac
UPS
CD
Phone
A 5V B R+ R- T+ T-
SA1
OFF
ON
1
8