Connection Examples - Danfoss iC7 Series Operating Manual

iC7 Series Functional Safety
Operating Guide
The frequency converter is shipped without any wiring to the functional safety I/O terminals. As a result, all safe inputs are de-ener-
gized and STO is active.
1. If the STO safety function is not needed, wire the terminal block as shown in
the accessory bag, and mount them on X31 and X32. This ensures that both STO inputs are energized with 24 V DC for
enabling normal operation.
Illustration 6: Wired Terminal Block (on the Left) and STO Jumper Clip (on the Right)

4.2 Connection Examples

Due to the galvanic isolation of the STO inputs, various connections and different polarities are possible in the wiring.
For example, connect a safety actuator to STO input terminals, and set the voltage references as shown in
tion 8. Setups with the same voltage level on both channels (+24 V) are supported, but also setups with different voltage levels
(+24 V and GND).
To avoid stacking and drifting of voltages to a dangerous level, GND PELV of the drive and the external safety device must be
interconnected.
+24 V
41 P
+24 V
P
Safety Actuator
Illustration 7: STO Connection Example for Using the Same Polarities (Channel A and Channel B = 24 V)
Danfoss A/S © 2023.03
N O T I C E
41 24V
42 S.INA+
43 S.INB+
44 S.FB+
45 GND
46 S.INA–
0 V
47 S.INB–
48 S.FB–
Illustration 6, or use the STO jumper clips from
Illustration 7
AQ319741840653en-000201 / 136R0268 | 13
Installation
and Illustra-