NORD Drivesystems BU0700 - Manual (Page 46)

NORDAC SK 700E Operating Manual
46 Subject to technical alterations BU 0700 GB-1411
3.2.2 Standard I/O
(SK CU1-STD, Option)
The Customer Unit standard I/O provides sufficient control terminals for most
applications and it is fully terminal-compatible with NORDAC vector mc.
There are 1 differential analog input and 4 digital inputs available for control of
the frequency inverter. The analog input can process signals from 0...10V or
0...20mA and/or 4...20mA (with additional burden resistance).
The analog output allows actual operating parameters to be transmitted to a
display device or process control system. The output signal is scalable and
available in the voltage range 0...10V.
By means of the two relay contacts, brake control and even warnings to another
system can be initiated.
The connected inverter can be controlled and parameterised via the interface
RS485. A simple function test of the frequency inverter can be carried out using
NORD CON software. Following successful parameterisation, the complete
data set can be stored as a file.
The digital inputs of the Standard I/O can also be assigned analog functions
(see process controller, Chapter 8.2).
Here, input voltages ≥10V are processed
as 10V signals and correspond to 100%. (9V = 90%, ... , 0V=0%)
Connector Functions Maximum cross-section Parameter
X1.1 Output relay 1.5 mm 2 P434 ... P443
X1.2 Analog signals IN / OUT 1.0 mm
2
P400 ... P419
X1.3 Digital inputs 1.0 mm
2
P420 ... P423
X1.4 Bus signals / power supply 1.0 mm
2
P507 ... P513
74 RS485 -
X
1
.1
X
1
.2
X
1
.3
X
1
.4
11 VREF 10V
12 AGND /0V
13 AIN1 -
14 AIN1 +
17 AOUT1
21 DIG IN 1
22 DIG IN 2
23 DIG IN 3
24 DIG IN 4
42 VO +15V
41 VO +5V
40 GND /0V
73 RS485 +
01 REL1.1
02 REL1.2
03 REL2.1
04 REL2.2
NOTE: All control voltages are based on a common reference potential!
Potentials AGND /0V und GND /0V are internally linked in the device.
The maximum total current 5/15V is 300mA!
Floating contacts or
output of a PLC: 7,5...33V
(low = 0...3,5Volt)
Differential input 0...10V
0...20mA
Power supply: 5V
RS485 (USS Protocol)
Power supply 5V for
ParameterBox, p-box or
motor PTC thermistor
(switching threshold=2.5V,
on any digital input)
Digital inputs:
DIG IN 1 = On right
DIG IN 2 = On left
DIG IN 3 = Parameter set bit 0
DIG IN 4 = Fixed frequency 1
Output relay:
max. 2,0A
28V DC /230V AC
U
REF
= 10V / I
max
= 10 mA PLC analog output: 0...10V
or potentiometer: 2...10k

Power supply: 15V
Termination resistor for
RS 485 interface (120

)
Additional burden resistance for
0/4...20mA analog input (250

)
WARNING / NOTE
It is not permissible to connect the output relay of the Customer Unit (SK CU...and SK XU) to dangerous
voltages(
≥60VAC) if a contact of the relay is connected to a circuit with safe isolation.
U/I switching
Analog input,
250

ON = Current, OFF = Voltage
Termination
resistor
RS 485
120

OFF
ON
OFF
ON