Honeywell NXL Series Applications Manual page 58

Page 58 (68)
4.11.2 Examples
PFC with interlocks and autochange between 3 pumps (the standard I/O expansion board must be
replaced by NXOPTB5 option board)
Situation: 1 controlled drive and 2 auxiliary drives.
Parameter settings: 2.10.1= 2
Interlock feedback signals used, autochange between all drives used.
Parameter settings: 2.10.4=4
DIN4 active (par.2.2.6=0)
The interlock feedback signals come from the digital inputs DIN4 (AI1), DIN2 & DIN3
selected with parameters 2.1.15.17, 2.1.15.18 and 2.2.4.
The control of pump 1 (par.2.3.1=17) is enabled through Interlock 1 (DIN2,
2.1.15.17=10), the control of pump 2 (par.2.3.2=18) through Interlock 2 (DIN3, par.
2.1.15.18=13) and the control of pump 3 (par.2.3.3=19) through Interlock 3 (DIN4)
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
19 AO1- Analogue output
A RS 485 Serial bus
B RS 485 Serial bus
21 RO1
22 RO1
23 RO1
NXOPTB5
22 RO1/1 Autochange 1 (Pump 1 control), par 2.3.2 = 17
23 RO1/2
25 RO2/1 Autochange 2 (Pump 2 control), par 2.3.3 = 18
26 RO2/2
28 RO3/1 Autochange 3 (Pump 3 control), par 2.3.4 = 19
29 RO3/2
Table 1- 18. Example of PFC-control I/O configuration with interlocks and
autochange between 3 pumps
Honeywell
Signal
Relay output 1
FAULT