USER MANUAL – Z-4AI
3
POWER SUPPLY
Supply voltage
10
– 40 Vdc or 19 – 28 Vac ( 50Hz - 60Hz)
Power
consumption
Min: 0.5W; Max: 2W (to power 4 current loop)
The power supply transformer necessary to supply the module must comply with EN60742
(Isolated transformers and safety transformers requirements). To protect the power supply, it is
recommended to install a fuse.
Input connections
It is possible to connect two types of sensors to the Z-4AI module:
passive sensors
, indicated with “S” label (these sensors have to be supplied: by a module
external voltage Vext or by the module internal voltage Vaux);
active sensors
, indicated with “voltage generator” or “current generator” label (these
sensors have already been supplied).
In the following figure are shown five possible sensor connections.
