Danfoss VLT Midi Drive FC 280 Operating Manual page 60

Specifications
37
38
33
Functional
isolation
RS485
Illustration 9.1 Galvanic Isolation
NOTICE
HIGH ALTITUDE
For installation at altitudes above 2000 m (6562 ft), contact Danfoss hotline regarding PELV.
Pulse inputs
Programmable pulse inputs
Terminal number pulse
Maximum frequency at terminal 29, 33
Maximum frequency at terminal 29, 33
Minimum frequency at terminal 29, 33
9 9
Voltage level
Maximum voltage on input
Input resistance, R
Pulse input accuracy
Digital outputs
Programmable digital/pulse outputs
Terminal number
Voltage level at digital/frequency output
Maximum output current (sink or source)
Maximum load at frequency output
Maximum capacitive load at frequency output
Minimum output frequency at frequency output
Maximum output frequency at frequency output
Accuracy of frequency output
Resolution of frequency output
1) Terminal 27 can also be programmed as input.
The digital output is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
Analog outputs
Number of programmable analog outputs
Terminal number
Current range at analog output
Maximum 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, 24 V DC output
Terminal number
Maximum load
The 24 V DC supply is galvanically isolated from the supply voltage (PELV). However, the supply has the same potential as the
analog and digital inputs and outputs.
58
VLT
PELV isolation
Control
Mains
High
Motor
voltage
DC bus
i
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®
Midi Drive FC 280
29, 33
32 kHz (push-pull driven)
5 kHz (open collector)
4 Hz
See the section on digital input
28 V DC
Approximately 4 kΩ
Maximum error: 0.1% of full scale
0–24 V
40 mA
1 kΩ
10 nF
4 Hz
32 kHz
Maximum error: 0.1% of full scale
10 bit
0/4–20 mA
500 Ω
Maximum error: 0.8% of full scale
10 bit
12, 13
100 mA
MG07A402
2
1
1)
27
1
42