Danfoss VLT HVAC Operating Instructions Manual page 136

8. Specifications
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. 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.
8
Control card, RS-485 serial communication:
Terminal number
Terminal number 61
The RS-485 serial communication circuit is functionally separated from other central circuits and
galvanically isolated from the supply voltage (PELV).
Digital output:
Programmable digital/pulse outputs
Terminal number
Voltage level at digital/frequency output
Max. output current (sink or source)
Max. load at frequency output
Max. capacitive load at frequency output
Minimum output frequency at frequency output
Maximum output frequency at frequency output
Accuracy of frequency output
Resolution of frequency outputs
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
Max. load
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.
136
i
MG.11.A4.02 - 09.10.06. VLT
®
VLT HVAC Drive Operating Instructions
110 kHz (Push-pull driven)
5 kHz (open collector)
see section on Digital input
Max. error: 0.1% of full scale
Max. error: 0.5 % of full scale
68 (P,TX+, RX+), 69 (N,TX-, RX-)
Common for terminals 68 and 69
Max. error: 0.1 % of full scale
® is a registered Danfoss trademark
2
29, 33
4 Hz
28 V DC
approx. 4 kΩ
1
42
0/4 - 20 mA
500 Ω
8 bit
2
27, 29 1)
0 - 24 V
40 mA
1 kΩ
10 nF
0 Hz
32 kHz
12 bit
12, 13
: 200 mA