Pulse inputs:
Programmable pulse inputs
2
Terminal number pulse
29, 33
Max. frequency at terminal, 29, 33
110 kHz (Push-pull driven)
Max. frequency at terminal, 29, 33
5 kHz (open collector)
Min. frequency at terminal 29, 33
4 Hz
Voltage level
see section on Digital input
Maximum voltage on input
28 V DC
Input resistance, R
i
approx. 4 k
Ω
Pulse input accuracy (0.1 - 1 kHz)
Max. error: 0.1% of full scale
Analog output:
Number of programmable analog outputs
1
Terminal number
42
Current range at analog output
0/4 - 20 mA
Max. load to common at analog output
500
Ω
Accuracy on analog output
Max. error: 0.5 % of full scale
Resolution on analog output
12 bit
The analog output is galvanically isolated from the supply voltage (PELV) and other high-voltage
terminals.
Control card, RS-485 serial communication:
Terminal number
68 (P,TX+, RX+), 69 (N,TX-, RX-)
Terminal number 61
Common for terminals 68 and 69
The RS-485 serial communication circuit is functionally separated from other central circuits and
galvanically isolated from the supplier voltage (PELV).
Digital output:
Programmable digital/pulse outputs
2
Terminal number
27, 29
1)
Voltage level at digital/frequency output
0 - 24 V
Max. output current (sink or source)
40 mA
Max. load at frequency output
1 k
Ω
Max. capacitive load at frequency output
10 nF
Minimum output frequency at frequency output
0 Hz
Maximum output frequency at frequency output
32 kHz
Accuracy of frequency output
Max. error: 0.1 % of full scale
Resolution of frequency outputs
12 bit
1) Terminal 27 and 29 can also be programmed as input.
The digital output is galvanically isolated from the supply voltage (PELV) and other high-voltage
terminals.
Control card, 24 V DC output:
Terminal number
12, 13
Max. load
: 200 mA
The 24 V DC supply is galvanically isolated from the supply voltage (PELV), but has the same
potential as the analog and digital inputs and outputs.
3. VLT HVAC Selection
VLT
®
HVAC Drive Design Guide
56
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
3
