Mains
Functional
isolation
PELV isolation
Motor
DC-Bus
High
voltage
Control
+24V
RS485
18
37
130BA117.10
Illustration 10.1 PELV Isolation
Pulse
Programmable pulse
2/1
Terminal number pulse
29
1)
, 33
2)
/ 33
3)
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
10.2.1 Digital Inputs
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
Encoder input accuracy (1-11 kHz)
Max. error: 0.05 % of full scale
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
Analog output
Number of programmable analog outputs
1
Terminal number
42
Current range at analog output
0/4-20 mA
Max. load GND - analog output
500
Ω
Accuracy on analog output
Max. error: 0.5% of full scale
Resolution on analog output
12 bit
The analogue 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
supply voltage (PELV).
Specifications
VLT
®
HVAC Drive Operating Instructions
MG11AI02 - VLT
®
is a registered Danfoss trademark
79
10
10
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: [email protected]