Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 131)

Starting torque (variable torque) maximum 110% for 60 s 1)
Overload torque (variable torque) maximum 110% for 60 s
Torque rise time in VVC plus (independent of fsw) 10 ms
1) Percentage relates to the nominal torque.
2) The torque response time depends on application and load but as a general rule, the
torque step from 0 to reference is 4–5 x torque rise time.
Cable lengths and cross sections for control cables 1)
Maximum motor cable length, screened 150 m
Maximum motor cable length, unscreened 300 m
Maximum cross-section to control terminals, flexible/
rigid wire without cable end-sleeves
1.5 mm 2 /16 AWG
Maximum cross-section to control terminals, flexible wire
with cable end-sleeves
1 mm 2 /18 AWG
Maximum cross-section to control terminals, flexible wire
with cable end-sleeves with collar
0.5 mm 2 /20 AWG
Maximum cross section to control terminals 0.25 mm 2 /24 AWG
1) For power cables, see Power Dependent Specifications.
Digital inputs
Programmable digital inputs 4 (6) 1)
Terminal number 18, 19, 27 1) , 29 1) , 32, 33
Logic PNP or NPN
Voltage level 0–24 V DC
Voltage level, logic ‘0’ PNP <5 V DC
Voltage level l, logic ‘1’ PNP >10 V DC
Voltage level, logic ‘0’ NPN 2) >19 V DC
Voltage level, logic ‘1’ NPN 2) <14 V DC
Maximum voltage on input 28 V DC
Pulse frequency range 0–110 kHZ
(Duty cycle) Min. pulse width 4.5 ms
Input resistance, Ri Approximately 4 kΩ
Analog inputs
Number of analog inputs 2
Terminal number 53, 54
Modes Voltage or current
Mode select Switch S201 and switch S202
Voltage mode Switch S201/switch S202 = OFF (U)
Voltage level —10 to +10 V (scaleable)
Input resistance Ri Approximately 10 kΩ
Maximum voltage ±20 V
Current mode Switch S201/switch S202 = ON (I)
Current level 0/4 to 20 mA (scaleable)
Input resistance Ri Approximately 200Ω
Maximum current 30 mA
Technical Specification
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 129