Analog Inputs; Pulse/Encoder Inputs - Danfoss VLT AutomationDrive FC 302 Operating Manual

Operating Guide | VLT® AutomationDrive FC 302
When using a contactor with a DC coil inside with STO, it is important to make a return way for the current from the coil when turning
it off. The return way can be created by using a freewheel diode (or, alternatively, a 30 V or 50 V MOV for quicker response time) across
the coil. Typical contactors can be bought with this diode.

9.6.3 Analog Inputs

Number of analog inputs
Terminal number
Modes
Mode select
Voltage mode
Voltage level
Input resistance, R
i
Maximum voltage
Current mode
Current level
Input resistance, R
i
Maximum current
Resolution for analog inputs
Accuracy of analog inputs
Bandwidth
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
+24 V
Control
18
37
Functional
isolation
RS485
Illustration 52: PELV Isolation

9.6.4 Pulse/encoder Inputs

Programmable pulse/encoder inputs
Terminal number (pulse)
Terminal number (encoder)
Maximum frequency at terminals 29, 32, 33
Maximum frequency at terminals 29, 32, 33
Maximum frequency at terminals 29, 32, 33
Voltage level
138 | Danfoss A/S © 2019.12
PELV isolation
Mains
High
Motor
voltage
DC-bus
Specifications
53 (201), 54 (202)
Voltage or current
Switch A53 (S201) and switch A54 (S202)
Switch A53 (S201)/A54 (S202) = OFF (U)
-10 V to +10 V (scaleable)
Approximately 10 kΩ
Switch A53 (S201)/A54 (S202) = ON (I)
0/4 to 20 mA (scaleable)
Approximately 200 Ω
10 bit (+ sign)
Maximum error 0.5% of full scale
110 kHz (Push-pull driven)
5 kHz (Open collector)
See Digital Inputs.
AQ275652476278en-000101 / 130R0709
2
±20 V
30 mA
100 Hz
2/1
29 (1) , 33
32, 33 (2)
4 Hz