Danfoss VLT AutomationDrive FC 301 Operating Instructions Manual page 64

Specifications
STO terminal 37
Voltage level
Voltage level, logic'0' PNP
Voltage level, logic'1' PNP
Maximum voltage on input
Typical input current at 24 V
Typical input current at 20 V
Input capacitance
All digital inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
1) Terminals 27 and 29 can also be programmed as output.
2) Except STO input Terminal 37.
3) See chapter 4.8.5 Safe Torque Off (STO) for further information about terminal 37 and STO.
4) When using a contactor with a DC coil inside in combination with STO, it is important to make a return way for the current
from the coil when turning it off. This can be done by using a freewheel diode (or, alternatively, a 30 or 50 V MOV for quicker
response time) across the coil. Typical contactors can be bought with this diode.
Analog inputs
Number of analog inputs
Terminal number
Modes
Mode select
8 8
Voltage mode
Voltage level
Input resistance, R
Maximum voltage
Current mode
Current level
Input resistance, R
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.
Illustration 8.1 PELV Isolation
62
Operating Instructions
3, 4)
(Terminal 37 is fixed PNP logic)
i
i
+24V
18
37
Functional
isolation
RS485
Danfoss A/S © Rev. 07/2014 All rights reserved.
PELV isolation
Control
High
voltage
Voltage or current
Switch S201 and switch S202
Switch S201/switch S202 = OFF (U)
-10 to +10 V (scaleable)
Switch S201/switch S202 = ON (I)
0/4 to 20 mA (scaleable)
Maximum error 0.5% of full scale
Mains
Motor
DC-Bus
0-24 V DC
<4 V DC
>20 V DC
28 V DC
50 mA rms
60 mA rms
400 nF
2
53, 54
approx. 10 kΩ
±20 V
approx. 200 Ω
30 mA
10 bit (+ sign)
100 Hz
MG33AP02