The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals; however, the USB
ground connection is not galvanically isolated from ground. Use only an isolated laptop as PC connection to the USB connector on
the drive.
10.6.2 STO Terminal XD2.19 (Terminal XD2.19 is Fixed PNP Logic)
STO Terminal XD2.19
(1)(2)
Voltage level
0–24 V DC
Voltage level, logic 0 PNP
<4 V DC
Voltage level, logic 1 PNP
>20 V DC
Maximum voltage on input
28 V DC
Typical input current at 24 V
50 mA rms
Typical input current at 20 V
60 mA rms
Input capacitance
400 nF
1
For more information about Terminal XD2.19 (Terminal 37 on the drive module) and Safe Torque Off, see the VLT
®
FC Series - Safe Torque Off Oper-
ating Guide.
2
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. This
can be done 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.
All digital inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
10.6.3 Control Card, 24 V DC Output
Terminal number
XD2.10, XD2.11
Output voltage
24 V +1, -3 V
Maximum load
200 mA
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.
10.6.4 Control Card, 10 V DC Output
Terminal number
XD2.6
Output voltage
10.5 V ±0.5 V
Maximum load
15 mA
The 10 V DC supply is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
10.6.5 Digital Outputs
Programmable digital/pulse outputs
2
Terminal number
(1)
XD2.14, XD2.15
Voltage level at digital/frequency output
0–24 V
Maximum output current (sink or source)
40 mA
Maximum load at frequency output
1 kΩ
Maximum capacitive load at frequency output
10 nF
Minimum output frequency at frequency output
0 Hz
Maximum output frequency at frequency output
32 kHz
Accuracy of frequency output
Maximum error: 0.1% of full scale
Resolution of frequency outputs
12 bit
1
Can also be programmed as input.
The digital output is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
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Danfoss A/S © 2020.09
Specifications
VLT® Refrigeration Drive FC 103
Operating Guide
