PSI302P – Manual de Instrução e Manutenção
6
As for troubleshooting, the
PSI302P
has five indication LEDs and
PSI302P-2
has three indication LEDs wich inform its
operation status. A green power supply LED informs that the
PSI302P
is appropriately powered. A red overcurrent LED
for each channel, will be lit should any abnormal condition occurs in the field wiring. These LEDs are able to detect
most problems wich may occur in a Fieldbus installation. However, other problems which are not detectable by the
LEDs may occur. Such problems should be: excessive noise introduced by the external power supply; impedance
lower than 20
Ω
in the communication line (consider that such impedance may not be purely resistive and, therefore not
detectable by the overcurrent circuit); and a DC voltage higher than 18 Vdc in the communication line. Such abnormal
conditions may be easily detected by measurement instruments.
Because the
PSI302P
is a simply and compact device, it is recommended that repair services be done by replacing
faulty modules instead of electronic components. Some eletronic components used in the
PSI302P
are highly accurate
and in the state-of-art, being therefore not easily found in ordinary retail stores. This is the reason why the
PSI302P
–
Fieldbus Power Supply Impedance ha been designed in modules, in order to simplify repair services and the
maintenance of spare parts.
TECHNICAL CHARACTERISTICS
Electrical Characteristics:
Power Supply:
24 to 32 Vdc ±10%
Output Current:
340 mA (máx).
Mechanical Characteristics:
Dimensions (LxPxH):
40x142x126 mm
Enclosure:
Metallic box for panel mounting.
Mounting:
With screws or by means of DIN rail.
DIN rail:
TS35-DIN EN 50022 or TS32-DIN EN50035
or TS15-DIN EN50045.
Ambient Conditions:
Operation:
T
AMB
-20°C to 50°C @RH 10% a 95%, without
condensing.
Storage:
T
AMB
-50°C to 70°C @RH 5% a 95%, without
condensing.
Functional Characteristics:
Input Filter:
Attenuation of 10dB in the input power ripple @60 Hz.
Impedance Control:
Active impedance control.
Terminator:
Fieldbus terminator.
Safety Characteristics:
Output Overcurrente:
Limitated in 500 mA
Input Fuser:
2,5 A.
Atmospherics Discharges:
Inpout and output protected for surge suppressor.
Intrinsic Safety:
Cannot be used directly.
Aproximately Weight:
230g
