GE VersaPoint IC220PBI002, User Manual

Page: 47 / 202

GFK-1911B Chapter 4 Installation 4-5
4
Electrical isolation
If electrical isolation is required between logic and I/O you must provide the NIU
supply U
M
and the I/O supply U
S
from separate power supplies.
If various electrically isolated areas are required within a VersaPoint station,
additional power terminals that draw their current from separate power supplies
must be used.
The correct method of providing and distributing power to the station depends on
the needs of the application. See chapter 5 for detailed information about power
sources and power distribution in the VersaPoint I/O station.
Use power supplies with safe isolation!
Use power supplies that ensure safe isolation between primary and secondary
circuit (according to EN 50
1 78).
For additional voltage supply specifications refer to the data sheets of the NIUs
and power terminals.
Voltage supplies are connected using unshielded cables as described previously.
For the connector assignment of the supply voltage connections please refer to
the module-specific data sheets of NIU, power terminals, and segment terminals.
Dangerous voltage!
When the power terminal is removed, the metal contacts are freely accessible.
With
1 20V or 230V power terminals, it should be assumed that dangerous voltage
is present. You must disconnect power to the station before removing a terminal!
If these instructions are not followed, there is a danger of damage to health
and danger of a life-threatening injury.