Honeywell NXL Series Applications Manual page 60

Page 60 (68)
PFC with interlocks and autochange between 2 pumps
Situation: 1 controlled drive and 1 auxiliary drive.
Parameter settings: 2.10.1= 1
Interlock feedback signals used, autochange between pumps used.
Parameter settings: 2.10.4=4
The interlock feedback signals come from the digital input DIN2 (par. 2.1.15.17) and
digital input DIN3, (par. 2.1.15.18).
The control of pump 1 (par.2.3.1=17) is enabled through Interlock 1 (DIN2, P2.1.15.17),
the control of pump 2 (par.2.3.2=18) through Interlock 2 (par. 2.1.15.18=13)
Reference
potentiometer
2-wire
transmitter
Actual
value
I
(0)4...20 mA
4
Description of parameters
Terminal
1 +10V Reference output
ref
2 AI1+ Voltage input frequency reference/DIN4
3 AI1- I/O Ground
4 AI2+ PID Actual value
5 AI2-
–
6 +24V Control voltage output
+
7
GND I/O ground
8 DIN1 START
9 DIN2 Interlock 1 (par 2.1.15.17 = 10)
10 DIN3 Interlock 2 (par 2.1.15.18 = 13)
11 GND I/O ground
18 AO1+ Output frequency
mA
Analogue output
19 AO1-
A RS 485 Serial bus
B RS 485 Serial bus
21 RO1
22 RO1
23 RO1
Standard I/O expansion
X4
12 +24V Control voltage output max. 150 mA
13 GND Ground for controls, e.g. for +24V and DO
14 DIE1 Preset speed 2, par 2.2.1 = 7
15 DIE2 Fault reset, par 2.2.2 = 4
16 DIE3 Disable PID (Freq reference from AI1), par 2.2.3 = 11
X2
25 ROE1/ Autochange 2 (Pump 2 control), par 2.3.2 = 18
COM
26 ROE1/NO
28 TI+ Motor Thermistor input:
29 TI-
Table 1- 19. Example of PFC-control I/O configuration with interlocks and
autochange between 2 pumps
Signal
Autochange 1 (Pump 1 control)
par 2.3.1. = 17
Active = Fault, stop according to defined method
Honeywell