ABB ACS880-01-061A-3+N5350 - Analog Inputs; Analog Input 1

6-4 Control Wiring 3AXD50000011888
6.3 Analog Inputs
An analog input is provided standard in the ACS880+N5350 for controlling the speed of the cooling tower fan if desired.
6.3.1 Analog Input 1
Analog Input 1 is capable of accepting a single-ended voltage signal on terminal XAI4 with respect to the analog common
on terminal XAI3. Should the customer desire to control the speed of the fan with a potentiometer, a +10V reference signal is
provided on terminal XAI1 is provided. It is recommended that a potentiometer with a resistance value > 200kΩ be used.
See Table 6-2 for jumper settings. See parameter 12.15 (AI1 Unit Selection Command) to select Analog Input 1 as the speed
reference and parameters 12.17 through 12.20 to customize the scaling and ltering for this input.
Note: This signal can be ±10VDC or 0 to 20mA. The mode (voltage or current) is selected by jumper J1. For detailed
information on hardware settings and software see manual.
Figure 6-2 depicts a potentiometer connection to Analog Input 1.
Figure 6-2
Reference voltage and analog inputs
1
2
3
4
5
6
7
+VREF
-VREF
AGND
AI1+
AI1-
AI2+
AI2-
10 VDC , R
L
1...10 kohm
-10 VDC , R
L
1...10 kohm
Ground
Speed reference
0(2)...10 V, R
in
> 200 kohm
By default not in use
0(4)...20mA, R
in
> 200 kohm
XAI
Table 6-2 Analog Input 1 Technical Data
Reference voltage for analog inputs +VREF
and -VREF (XAI:1)
Connector pitch 5mm, wire size 2.5mm
2
10V ±1% and –10V ±1%, R
load
1…10kohm
Analog inputs AI1 (XAI:4…XAI:7)
Current/voltage input mode selection by
jumpers.
Connector pitch 5mm, wire size 2.5mm
2
Current input: –20…20mA, R
in
: 100ohm
Voltage input: –10…10V, R
in
: > 200kohm
Differential inputs, common mode range ±30V
Sampling interval per channel: 0.25ms
Hardware ltering: 0.25ms, adjustable digital ltering up to 8ms
Resolution: 11 bit + sign bit
Inaccuracy: 2% of full scale range