Analog inputs
Number of analog inputs
2
Terminal number
53
1)
, 54
Modes
Voltage or current
Mode select
Software
Voltage level
0–10 V
Input resistance, R
i
approximately 10 k
Ω
Maximum voltage
-15 V to +20 V
Current level
0/4 to 20 mA (scaleable)
Input resistance, R
i
approximately 200
Ω
Maximum current
30 mA
Resolution for analog inputs
11 bit
Accuracy of analog inputs
Maximum error 0.5% of full scale
Bandwidth
100 Hz
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
1) Terminal 53 supports only voltage mode, and can also be used as digital input.
Mains
Functional
isolation
PELV isolation
Motor
DC Bus
High
voltage
Control
+24 V
RS-485
18
31
130BD310.10
Illustration 9.1 Analog Inputs
Pulse inputs
Programmable pulse inputs
2
Terminal number pulse
29, 33
Maximum frequency at terminal 29, 33
32 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 the section on digital input.
Maximum voltage on input
28 V DC
Input resistance, R
i
Approximately 4 k
Ω
Pulse input accuracy (0.1–1 kHz)
Maximum error: 0.1% of full scale
Pulse input accuracy (1–32 kHz)
Maximum error: 0.05% of full scale
Digital outputs
Programmable digital/pulse outputs
1
Terminal number
27
1)
Voltage level at digital/frequency output
0–24 V
Maximum output current (sink or source)
40 mA
Maximum load at frequency output
1 k
Ω
Maximum capacitive load at frequency output
10 nF
Minimum output frequency at frequency output
4 Hz
Maximum output frequency at frequency output
32 kHz
Accuracy of frequency output
Maximum error: 0.1% of full scale
Resolution of frequency output
10 bit
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.
Specifications
VLT
®
Midi Drive FC 280
50
Danfoss A/S © 11/2015 All rights reserved.
MG07A102
9
9
