Power Supply 24VDC – 2A
G128-809
Application Notes
1 Scope
These application notes are a guide to applying the G128-809
Power Supply. They tell you how to install and connect the
G128-809.
2 Description
The G128-809 provides a compact, efficient and reliable power
supply where a regulated fixed 24VDC output is required for
other DIN modules. A wide range of commonly encountered
input supplies can be used. The DC output is isolated from the
input supply. The DC output has good regulation and low
noise, with a minimum 2A continuous capacity.
The G128-809 is idle and short circuit protected. Multiple
G128-809’s can be connected to provide redundant operation.
For a more detailed description see data sheet
G128-809.
3 Installation
3.1 Placement
A horizontal DIN rail, mounted on the vertical rear surface of
an industrial steel enclosure, is the intended method of
mounting. The rail release clip of the G128-809 should face
down, so the front panel and terminal identifications are
readable and so the internal electronics receive a cooling
airflow. An important consideration for the placement of the
module is electro magnetic interference (EMI) from other
equipment in the enclosure. For instance, VF and AC servo
drives can produce high levels of EMI. Always check the EMC
compliance of other equipment before placing the G128-809
close by.
3.2 Cooling
Vents in the top and bottom sides of the G128-809 case
provide cooling for the electronics inside. These vents must be
left clear. A spacing distance of a minimum of 100mm should
be allowed above and below the cooling vents for placement
of other modules. It is important to ensure that equipment
below does not produce hot exhaust air that heats up the
G128-809.
Screw
terminals
17 - 20
Cover release tabs (x4)
Top vents
DIN rail
Screw
terminals
1 - 4
Bottom
vents
Cooling
airflow
DIN rail
release
clip
Cover release tab
3.3 Wiring
The use of crimp “boot lace ferrules” is recommended for the
screw terminals. The input supply cable should be rated for
the supply voltage used at an operating temperature of
75°C.
Do not work on the module while connected to the input
supply. There are no internal adjustments in the G128-809.
