Edwards nEXT200200 - Figure 16 Logic Interface Connection - Mixed Parallel and Serial Operation

stop command has been received by the pump can any commands sent through the
par
allel interface be acted on.
If you use the start switch on the parallel interface to start the pump, you cannot stop
the pump by sending a stop command over the serial interface. To stop the pump, use
the parallel stop switch. The serial interface accepts the start or stop commands only
when you use the parallel interface switch to stop the pump.
Figure 16 Logic interface connecon - mixed parallel and serial operaon
1. RS232 interface on control equipment 2. 24 V d.c. electrical supply
3. Fuse 4. Oponal LED indic
ator ‑ system OK
5. Oponal LED indicator ‑ normal speed 6. Current limit resistor for LED
7. Oponal serial link selector 8. pump
9. Oponal voltmeter 10. Oponal serial enable switch
11. Oponal standby switch 12. Start switch
1. RS232 interface on control equipment 2. 24 V d.c. electrical supply
3. Fuse 4. Oponal LED indicator ‑ system OK
5. Oponal LED indicator ‑ normal speed 6. Current limit resistor for LED
7. Oponal serial link selector 8. pump
9. Oponal voltmeter 10. Oponal serial enable switch
11. Oponal standby switch 12. Start switch
Note:
The v
oltage supply to the pump controller can be more than 24 V. But the circuits
connected to the normal and fail line must have maximum external pull ‑ up voltage
rang as given in Table: Logic interface technical data on page 27.
Page 51
B85200880_D - Installaon