3 - 12
emPC-CXR
(
Hardware Manual
)
•
Installation
©
Janz Tec AG
Rev. V1.2
3.2.1
POWER IN
The system power supply is connected with a 4 pin T-coded M12 male connector.
DANGER
The product may only be operated with power supplies which can be considered SELV
circuits.
The return of the power supply (pin 4 = GND) is connected to the internal system GND
(via EMI filter chokes). The internal system GND is connected to the housing internally.
Hence the shells of all connectors are on system GND potential.
To comply with UL/IEC/EN 60950-1 : If the product is not supplied by a limited current
circuit, then a disconnection means - easily accessible and identifiable - has to be
provided in the final installation to separate the equipment from all power sources.
The specified power supply voltage range is defined at the input connector of the
product. At low input voltage and high system load, a high input current of several
ampere will flow. This can lead to substantial drop on the power input cable (even when
using 1.5 mm² M12 cable assemblies).
3.2.2
VGA connector
Analog VGA graphics connector as supplied by the COMexpress module.
4 pin male M12 T-coded
1 VIN-A (9..34V DC)
2 VIN-B (9..34V DC)
3 VS
4 GND
table 1: Power supply connector
VIN-A
Polarity-Reversal
Protection
VS
VIN-B
GND
Power
Supplies
Control
Input
System
Ground
Housing/
Connector-
Shields
figure 4: Power Supply Input
