JUMO 701550 di 308 - Digital Indicator Operating Manual - Manual (Page 25)

25
4 Electrical connection
4.4 Termination resistor for the RS422/485 interface
Setting
resistors
To ensure fault-free operation of several instruments
in a line structure, their internal termination resistors
must be activated at the start and end
.
h Pull plug-in module out towards the front by
pressing on the knurled areas
h Using a suitable aid (e.g. ballpoint pen), press all the
white switches into the same direction
h Re-insert the module into the housing
Check
h Press the
P + i keys
When checking the software version and the
termination resistors activated, an additional decimal
point appears behind the version number (top
display).
Example of version number 01.01:
active:
01.01.
inactive: 01.01
Bus
termination
active
h Push all 5 switches down
No
bus
termination
(ex-factory)
h Push all 5 switches up