SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Electrical networks (RS485)
Bus terminals
3
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Overview
•
For connecting PROFIBUS nodes with an RS485 interface to a
segment
•
Versions with transmission rates from 9.6 kbit/s to 12 Mbit/s
•
Clear and easy mounting (can be snapped onto DIN rail)
•
Clear location of faulty bus termination when bus terminal 12M
is used
•
PG connection with special bus terminal and PG connecting
cable possible without additional installation of network nodes
for bus terminal RS485.
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Benefits
•
Easy and clearly comprehensible connection of PROFIBUS
stations thanks to preassembled, integrated connecting cable
•
Simple cabinet pre-wiring by connecting the PROFIBUS
connecting cable with integrated interfaces
■
Application
The PROFIBUS bus terminals enable a bus station to be con-
nected to a PROFIBUS network.
•
Pre-wired device connection for PROFIBUS node
•
Easy connection of stations to PROFIBUS networks through
insertion of the radial line with Sub-D plug
•
Implementation of multipoint connections by directly intercon-
necting several bus terminals (up to 32 stations per segment)
with the 12M bus terminal.
■
Design
Different versions are available:
•
Up to 1.5 Mbit/s
Bus terminal RS485
•
Up to 12 Mbit/s
Bus terminal 12M
Applicable to all versions:
•
IP20 enclosure.
•
Wall mounting or mounting on deep standard DIN rail
possible.
•
External 6-pin terminal block for connection of inoming and
outgoing bus cable and equipotential bonding conductors.
•
Integrated connecting cable with Sub-D plug for connection of
nodes.
•
Combination of terminating resistors can be connected by
means of rotary switch.
The following additionally applies to the bus terminal 12M:
•
Ranges for transmission rates can be adjusted by means of
rotary switches.
•
Supply to the bus terminal 12M by the connected PROFIBUS
node (5 V DC/90 mA) via 9-pin Sub-D socket.
•
For maximum segment lengths, see Technical Specifications.
•
Incoming and outgoing bus cables are disconnected when
inserting the terminating resistors.
© Siemens AG 2014