Connecting Power At The Niu; Providing The 24V Segment Supply (U S ) At The Niu; Fusing For Short Circuit Protection - GE VersaPoint IC220PBI002 User Manual

Connecting Power at the NIU

Terminal
1.1, 2.1
1.2, 2.2
1.3, 2.3
1.4, 2.4
Providing the 24V Segment Supply (U
You can supply/generate the segment voltage at the NIU or a Power Terminal
module. There are several ways of providing the segment voltage on the NIU:
1. You can provide the segment voltage separately on the terminal points 1.1/2.1
and 1.3/2.3 (GND) of the Power Terminal Strip.
2. You can jumper the connections 1.1/2.1 and 1.2/ 2.2 to ensure that the
segment circuit is supplied from the main circuit.
3. With a switch between the terminal points 1.1/ 2.1 and 1.2/2.2 you can create
a segment circuit (e.g., an emergency stop circuit).
CAUTION: To minimize heat generation, use both of the adjacent contacts to
provide the main voltage and to provide/tap the segment voltage.

Fusing for Short Circuit Protection

Both the segment supply U
potential. Therefore, an isolated voltage area on the I/O side cannot be created.
Both the main supply and the segment supply are protected against polarity
reversal and surge voltage.
CAUTION: The main supply and the segment supply integrated into the NIU
do not have short circuit protection. The user must provide short circuit
protection. The rating of the fuse must be such that the maximum
permissible load current is not exceeded.
GFK-1911B Chapter 4 Installation
Assignment
Segment supply (+24VDC)
Main supply, NIU supply, communications power and
interface supply (+24VDC)
Reference potential
Functional earth ground (FE)
) at the NIU
S
and the main supply U
S
have the same reference
M
4
4-17