SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Electrical networks (RS485)
RS485 bus connector
3
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Overview
•
Used for connecting PROFIBUS nodes to the PROFIBUS bus
cable
•
Easy installation
•
FastConnect plugs ensure extremely short assembly times
due to their insulation-displacement technology
•
Integrated terminating resistors
(not in the case of 6ES7972-0BA30-0XA0)
•
Connectors with Sub-D socket permit PG connection without
the additional installation of network nodes
■
Application
The RS485 bus connectors for PROFIBUS are used for con-
necting a PROFIBUS node or a PROFIBUS network component
to the bus cable for PROFIBUS.
■
Design
Several different versions of the bus connector are available,
each optimized for the devices to be connected:
•
Bus connector with axial cable outlet (180°), e.g. for PCs and
SIMATIC HMI OPs, for transmission rates up to 12 Mbit/s with
integrated bus terminating resistor.
•
Bus connector with vertical cable outlet (90°);
This connector permits a vertical cable outlet (with or without
PG interface) for transmission rates of up to 12 Mbit/s with
integral bus terminating resistor. At a transmission rate of 3, 6 or
12 Mbit/s, the SIMATIC S5/S7 plug-in cable is required for the
connection between bus connector with PG-interface and pro-
gramming device.
•
Bus connector with 30° cable outlet (low-cost version) without
PG interface for transmission rates of up to 1.5 Mbit/s and
without integrated bus terminating resistor.
•
PROFIBUS FastConnect bus connector RS485 (90° or 180°
cable outlet) with transmission rates up to 12 Mbit/s for fast
and easy assembly using insulation displacement connection
technology (for rigid and flexible wires).
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Function
The bus connector is plugged directly into the PROFIBUS
interface (9-pin Sub-D socket) of the PROFIBUS station or a
PROFIBUS network component.
The incoming and outgoing PROFIBUS cable is connected in
the plug using 4 terminals.
By means of an easily accessible switch which is clearly visible
from the outside, the line terminator integrated in the bus
connector can be connected (not in the case of
6ES7972-0BA30-0XA0). In this process, incoming and outgoing
bus cables in the connector are separated (separation function).
This must be done at both ends of a PROFIBUS segment.
© Siemens AG 2014