Softing PBpro ETH, Руководство пользователя

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Chapter 2 - Installation
PBpro ETH - User Guide 9
2.3 Power supply
The PBpro ETH is powered by 24 V DC. The power supply plug connector is included in
the delivery. The power supply socket connector on the front panel is labeled DC 24 V
(see above).
The upper power supply terminal is labeled "+" and must be connected to 24 V. The lower
power supply terminal is labeled "-" and must be connected to 0V. The functional ground is
provided at the grounding screw close to the lower edge of the front side It is labeled with
the
symbol.
Proper grounding is prerequisite for compliance with the EMC directives and for ensuring
a proper operation.
The power supply is connected to the plug connector via flexible wires with a cross
section of 0.75 to 1.5 mm². The ground connection wire must have a cross section of 1.5
mm.
The PBpro ETH has an internal safety fuse which blows if an overvoltage (of approx. 30 V
or higher) occurs in the power supply or if a fault occurs in the device. The safety fuse can
only be replaced by the device manufacturer.
Important
The starting current of the PBpro ETH may be several amps for a few
milliseconds. The power supply must provide this starting current in
compliance with the voltage range to ensure a safe startup.
2.4 PROFIBUS interfaces
Depending on the configuration ordered, the PBpro ETH has up to four PROFIBUS-
compliant fieldbus interfaces (in accordance with EN 50170-2). They are labeled
"PB" (single channel version) or "PB 1", "PB 2" etc. (multi-channel version) The
PROFIBUS interface is electrically isolated up to a voltage of 500V DC.
The connecting element is a 9-pin female D-sub connector with the following pin layout:
Pin # Signal Description
1 SHIELD Housing
2 NC Not assigned
3 RxD/TxD-P PROFIBUS signal B/B'
4 /RTS RTS
5 GND Ground
6 VCC Bustermination power supply (load 10mA max.)
7 NC Not assigned
8 RxD/TxD-N PROFIBUS signal A/A'
9 NC Not assigned
Table 1: PROFIBUS pin layout