Installing The Accessory Modules; Main Unit Connection Diagram - CARLO GAVAZZI WM20 Manual De Instrucciones

installing the accessory modules

Fig.11
1. Ensure that the modules tobe installed are supported by the main
2. Disconnect the power supply and load.
3. Remove the protection cover of the local bus port on the main unit.
4. Ensure that the fastening pins of the module are in the "unlocked"
5. Align the accessory module with the main unit and apply slight pressure.
6. Turn the fastening pins of the last module connected to the "locked"
7. To connect a second accessory module, remove the protection cover of
8. Repeat steps 4–6 for the second module.

Main unit connection diagram

Diagram Description
Fig.12
Three-phase system with neutral (4-wire) unbalanced load and 3
CT 315 mA fuse (F).
Fig.13
Three-phase system with neutral (4-wire), unbalanced load, 3 CT
and 3 VT/PT
Fig.14
Three-phase system with neutral (4-wire), balanced load, 1 CT 315
mA fuse (F).
Fig.15
Three-phase system with neutral (4-wire), balanced load, 1 CT
and 1 VT/PT
Fig.16
Three-phase system without neutral (3-wire) unbalanced load and
3 CT. 315 mA fuse (F).
18
8021572 | WM20 | © 2016 | CARLO GAVAZZI Controls SpA
unit, see "Key to codes key of compatible accessory modules (rear of
module)" on page 9 and the admissible module configurations, see
"Possible configurations" on page 10.
position .
position .
the local bus port of the previously connected accessory module.
System
3P.n
3P.n
3P.2
3P.2
3P