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Specifications
Analog inputs
Number of analog inputs
Terminal number
Modes
Mode select
Voltage mode
Voltage level
Input resistance, R
Max. voltage
Current mode
Current level
Input resistance, R
Max. current
Resolution for analog inputs
Accuracy of analog inputs
Bandwidth
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
Illustration 10.1
10
10
Pulse inputs
Programmable pulse inputs
Terminal number pulse
Max. frequency at terminal, 29, 33
Max. frequency at terminal, 29, 33
Min. frequency at terminal 29, 33
Voltage level
Maximum voltage on input
Input resistance, R
Pulse input accuracy (0.1-1 kHz)
Analog output
Number of programmable analog outputs
Terminal number
Current range at analog output
Max. resistor load to common at analog output
Accuracy on analog output
Resolution on analog output
The analog output is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
Control card, RS-485 serial communication
Terminal number
Terminal number 61
The RS-485 serial communication circuit is functionally seated from other central circuits and galvanically isolated from the
supply voltage (PELV).
74
VLT
Operating Instructions
i
i
+24V
18
37
Functional
isolation
RS485
i
MG21A202 - VLT
®
AQUA Drive D-Frame
PELV isolation
Control
High
voltage
®
is a registered Danfoss trademark
Voltage or current
Switches A53 and A54
Switch A53/A54=(U)
0 V to 10 V (scaleable)
Switch A53/A54=(I)
0/4 to 20 mA (scaleable)
Max. error 0.5% of full scale
Mains
Motor
DC-Bus
110 kHz (Push-pull driven)
5 kHz (open collector)
see 10.2.1 Digital Inputs:
Max. error: 0.1% of full scale
Max. error: 0.8 % of full scale
68 (P,TX+, RX+), 69 (N,TX-, RX-)
Common for terminals 68 and 69
2
53, 54
approx. 10 kΩ
±20 V
approx. 200 Ω
30 mA
10 bit (+sign)
100 Hz
2
29, 33
4 Hz
28 V DC
approx. 4 kΩ
1
42
0/4-20 mA
500 Ω
8 bit
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