Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 132)

Resolution for analog inputs 10 bit (+ sign)
Accuracy of analog inputs Maximum error 0.5% of full scale
Bandwidth 20 Hz/100 Hz
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-
voltage terminals.
1
2
3
4
5
9
10
11
7
6
8
1. +24 V
2. 18
3. 37
4. Functional isolation
5. RS485
6. Control
7. PELV isolation
8. High voltage
9. Mains
10. Motor
11. DC-Bus
Figure 42: PELV isolation
Pulse
Programmable pulse 2/1
Terminal number pulse 29 1) , 33 2) / 33 3)
Maximum frequency at terminal 29, 33 110 kHZ (push-pull driven)
Maximum frequency at terminal 29, 33 5 kHZ (open collector)
Minimum frequency at terminal 29, 33 4 Hz
Voltage level See Digital Inputs in the General Technical Data section.
Maximum voltage on input 28 V DC
Input resistance, Ri Approximately 4kΩ
Pulse input accuracy (0.1–1 kHZ) Maximum error: 0.1% of full scale
Encoder input accuracy (1–11 kHZ) Maximum error: 0.05% of full scale
The pulse and encoder inputs (terminals 29, 32, 33) are galvanically isolated from the
supply voltage (PELV) and other high-voltage terminals.
1) only
2) Pulse inputs are 29 and 33
Analog output
Number of programmable analog outputs 1
Terminal number 42
Current range at analog output 0/4–20 mA
Maximum load GND — analog output 500 Ω
Accuracy on analog output Maximum error: 0.5% of full scale
Resolution on analog output 12 bit
Technical Specification
130 Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL