15
“Power+” +0500120IE - rel 1.1 - 02.05.2017
ENG
Note:
If the STO input is open, the electronic safety circuit cuts the current sourced from U, V and W outputs. If it happens
when the motor is running, the motor stop by coasting.
If the Safe Torque Off function is not used, the STO inputs must be shortcircuited to each other so as to enable correct
operation of the drive (ref. B).
Dispositivo di sicurezza NC
NC Safety device
A
B
Power +
ST
O1
ST
O2
Power +
ST
O1
ST
O2
Fig. 3.n
Serial network connection
For the serial connection use a three-wire shielded cable. For large networks, install a 120 ohm ¼ W resistor between
terminals Tx/Rx+ and Tx/RX- on the last drive or device connected, to avoid possible communication problems.
To ensure conformity to the EMC directive it is recommended to use a ferrite cable core (e.g. Fair-Rite 2631540002)
rounding the three wires only (with one and a half turn), located between shield earthing and the drive earth terminal
excluding the shield.
p
CO
/ building management system
RS485
Schermo
Shield
R = 120 ohm
Power +
GND
Tx/Rx+ Tx/Rx
-
GND
Tx/Rx+ Tx/Rx
-
Power +
GND
Tx/Rx+ Tx/Rx
-
Nucleo ferrite
Ferrite cable core
Fig. 3.o
