Operating Manual: PSS SB 3006-3 Series 8-7
User interface RS 485
A detailed description of the interface can be found in the “FS System
Description” and “ST System Description” in the PSS-range manual
package.
The RS 485 interface has internal termination: 120 Ohm between A and B,
270 Ohm between A and 5 V and between B and GND.
The termination on the RS 485 user interface can be switched off. To do
this, press the R
T
(USER) button on the front of the module to the OFF
position. This will enable you to build up an RS 485 network.
Button
R
T
(USER)
Status
Button operated,
ON position
Button not operated,
OFF position
Key
Terminating resistors are
connected
Terminating resistors are
disconnected
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