Danfoss VLT FC 280 Operating Manual page 69

VLT® Midi Drive FC 280
Operating Guide
6.6 Installation
6.6.1 Safe Input Terminals
All short-circuit risks must be eliminated!
Illustration 38: Safe Input Terminals
Table 37: Safe Input Terminals
Terminal
37
38
39
20
12
SGND is galvanically isolated with GND.
1
6.6.2 Jumper for Safety Bypass
If STO/SS1 function needs to be bypassed temporarily, bridge terminal 37-39 according to the following illustration.
If STO/SS1 function is no longer used or needs to be bypassed for quite a long time, Danfoss recommends to disable the safe input
via parameter 42-20 Safe Function.
Danfoss A/S © 2022.02
W A R N I N G
Name Description
SI A Safe input channel a
SI B Safe input channel b
SGND Safe GND, Ref. 0 V of SI A and SI B
(1)
GND Ref. 0 V of 24 V
24 V 24 V voltage supply
Safety Functions
AQ381425076031en-000101 / 130R1223 | 69