Danfoss VLT HVAC Operating Instructions Manual page 76

Specifications
Illustration 10.1
Pulse/encoder inputs
Programmable pulse/encoder inputs
Terminal number pulse/encoder
Max. frequency at terminal 29, 32, 33
Max. frequency at terminal 29, 32, 33
Min. frequency at terminal 29, 32, 33
Voltage level
Maximum voltage on input
Input resistance, R
i
Pulse input accuracy (0.1 - 1 kHz)
Encoder input accuracy (1 - 11 kHz)
The pulse and encoder inputs (terminals 29, 32, 33) are galvanically isolated from the supply voltage (PELV) and other high-
voltage terminals.
1)
only
2)
Pulse inputs are 29 and 33
3)
Encoder inputs: 32 = A, and 33 = B
Analog output
Number of programmable analog outputs
Terminal number
Current range at analog output
Max. load GND - analog output
Accuracy on analog output
Resolution on analog output
The analogue 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 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.
®
VLT HVAC Drive Operating Instructions
PELV isolation
+24V
Control
18
High
voltage
37
Functional
isolation
RS485
®
MG11AH02 - VLT is a registered Danfoss trademark
Mains
Motor
DC-Bus
29 1) , 33
110 kHz (Push-pull driven)
5 kHz (open collector)
Max. error: 0.1% of full scale
Max. error: 0.05 % 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
2/1
2) / 32 3) , 33 3)
4 Hz
see
28 V DC
approx. 4 kΩ
10 10
1
42
0/4 - 20 mA
500 Ω
12 bit
2
1)
27, 29
0 - 24 V
40 mA
1 kΩ
10 nF
0 Hz
32 kHz
12 bit
73