JUMO 709040 TYA-110 thyristor power unit Operating Manual - Manual (Page 44)

6 Settings
44 Power units 02.06
Logic control
inputs The thyristor power unit can also be operated by the following logical signals
(e.g. two-state/single-setpoint controller outputs):
(switching pulse bursts on or off):
- current signal 0/20mA (Terminals 1, 2)
- voltage signal 0/10V (Terminals 3, 4)
- floating contact (Terminals 4, 5)
6.4.1 Combinations of external potentiometer and electronic controller
Controller with
current output The voltage input (Terminals 3, 4) can be used together with the internal 10 V
source and a 5 k
Ω potentiometer to provide manual setting.
Switch S
a
S
b
Automatic open open
Manual closed closed
H
To prevent unintended overdriving on the changeover to manual
operation, S
a
should be mechanically coupled to S
b
. Otherwise the
two signal sources will be added together for a moment.