AMNYTT amnytt.no 3/2021 | Page 93

Us MAN RES 98
0.88
T
95
PWR
ERR L R
R AUT 96
1.6
0.18
max . 3 A
RESET / SET
L EN + +
3.0
2 / T1 4 / T2 6 / T3 1 / L1 3 / L2 5 / L3
Us MAN RES 98
0.88
T
95
PWR
ERR L R
R AUT 96
1.6
0.18
max . 3 A
RESET / SET
L EN + +
3.0
2 / T1 4 / T2 6 / T3 1 / L1 3 / L2 5 / L3
Actuator control and visualization
With ready-to-use software function blocks , the time and effort for controlling the frequency converters in screw conveyors and pumps in a return sludge pumping station is reduced . The plant can be visualized easily with the free-of-charge PLCnext Engineer software tool . It includes ready-made visualization symbols for actuators such as motors , pumps , and ventilators .
Efficient sewage sludge drying and cleaning
Phoenix Contact current measuring devices are used to make sewage sludge applications cost-effective . In addition , other relevant measured values are recorded , transmitted , and evaluated in the control room . Information on the efficiency of the process is transmitted through common interfaces such as Modbus , PROFIBUS , and PROFINET .
Safe digestion tower monitoring
Reliable temperature and pressure monitoring is required for the optimum aerobic degradation of sewage sludge in the digestion tower . With measuring transducers with ATEX approval , measured values are transmitted directly to the programmable logic controller . Intrinsically safe I / O modules facilitate the efficient control of actuators . Sensors are easily integrated through protocol converters and the HART protocol .
Safety concept for centrifuges
PROFIsafe devices are managed centrally by a higher-level safe controller . It is therefore possible to implement safe groups or safe individual shutdowns . In the event of an overspeed or the actuation of an emergency stop control device , the PROFIsafe controller triggers disconnection via the PROFIsafe devices . The centrifuge drives and also linked units such as sludge pumps are brought to a stop .
Wastewater treatment plant control system
Distributed I / O station with safety functions
19 ” server cabinet
Safety controller
Switch
Local controller , sludge dewatering
Safety relay
Frequency converter
Ord-No . 29 09 556 ELR H5 – IES – PT – 24DC / 500AC – 3 – P
Motor starter
Ord-No . 29 09 556 ELR H5 – IES – PT – 24DC / 500AC – 3 – P
Stirrer drive
Product pump drive
Sludge container drive
Cross conveyor drive
Over-speed safety relay
PHOENIX CONTACT 17