Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual page 52

Specifications
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 Safe Torque Off input Terminal 37.
3)
See chapter 4.8 Control Wiring for further information about terminal 37 and Safe Torque Off.
4)
When using a contactor with a DC coil inside in combination with Safe Torque Off , 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
Voltage mode
Voltage level
Input resistance, R
Max. voltage
Current mode
Current level
8 8
Input resistance, R
Max. 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.
+24V
18
37
Functional
isolation
RS485
Illustration 8.1 PELV Isolation of Analog Inputs
Pulse inputs
Programmable pulse
Terminal number pulse
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
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) Pulse inputs are 29 and 33
2) Encoder inputs: 32 = A, and 33 = B
50
Operating Instructions
i
i
PELV isolation
Control
Mains
High
Motor
voltage
DC-Bus
i
Danfoss A/S © Rev. 2014-02-06 All rights reserved.
400 nF
53, 54
Voltage or current
Switch S201 and switch S202
Switch S201/switch S202 = OFF (U)
-10 to +10 V (scaleable)
approx. 10 kΩ
±20 V
Switch S201/switch S202 = ON (I)
0/4 to 20 mA (scaleable)
approx. 200 Ω
30 mA
10 bit (+ sign)
Max. error 0.5% of full scale
100 Hz
1) 2)
29, 33 /32
110 kHz (Push-pull driven)
5 kHz (open collector)
see chapter 8.6.1 Digital Inputs
28 V DC
approx. 4 kΩ
Max. error: 0.1% of full scale
Max. error: 0.05 % of full scale
MG16E302
2
2/1
2)
, 33
4 Hz