13
In the system:
Electrically connecting the level electrode/transmitter
Connection of level electrode/level transmitter
The NRR 2-50 / NRR 2-51 level controller can be combined with the NRG 21-.. or NRG 26-21 level
electrodes and the NRGT 26-1 level transmitter.
For connecting the equipment, please use a screened, multi-core control cable with a minimum
conductor size of 0.5 mm
2
, e.g. LiYCY 4 x 0.5 mm
2
, maximum length 100 m.
Connect the screen as shown in the wiring diagram.
Important
n
Please commission the equipment as described in the NRG 21-.. , NRG 26-21 or
NRGT 26-1 installation & operating manuals.
n
Route the connecting cable between items of equipment separately from power lines.
n
The level transmitter must be connected to its own dedicated power supply.
Factory settings
Level controller NRR 2-50
n
De-energizing delay: 3 sec. (factory set)
n
Voltage input for the connection of an
NRG 21-.. or NRG 26-21 level electrode.
n
MAX switchpoint AL.Hi = 80 %
n
MIN switchpoint AL.Lo = 20 %
n
Setpoint SP = 50 %
n
Proportional band Pb = 20 % of setpoint
n
Integral action time ti = 0 %
n
Dead band = +/– 5 % of setpoint
n
Valve travel time tt = 40 s
n
Calibration value CAL.P = 100 %
n
Fill control function
n
MIN/MAX output contact set as MAX alarm
Code switch
c
: S1,S2,S3, S4 OFF
Level controller NRR 2-51
n
De-energizing delay: 3 sec. (factory set)
n
Voltage input for the connection of an
NRG 21-.. or NRG 26-21 level electrode.
n
MAX switchpoint AL.Hi = 80 %
n
MIN switchpoint AL.Lo = 20 %
n
Setpoint SP = 50 %
n
Proportional band Pb = 20 % of setpoint
n
Integral action time ti = 0 %
n
Dead band = +/– 5 % of setpoint
n
Calibration value CAL.P = 100 %
n
Fill control function
Code switch
c
: S1,S2,S3, S4 OFF
continued
