Steca Tarom 4545 - Connections and Operating Buttons; Stecalink Slave Connection

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9.2 Connections and operating buttons
The following section describes the connections and operating buttons. For information on the dis-
play and operation see section 13.
9.2.1 StecaLink slave connection
1. Set a unique slave address at the device with the StecaLink slave connection; see section
14.3.9.1 ‘StecaLink slave address setting’.
2. Connect the StecaLink slave connection to the ‘StecaLink master’ connection of the superor-
dinate master device.
3. Use a free ‘StecaLink slave’ connection for looping the connection through further slaves.
NOTICE!
– The StecaLink slave connection is an RS-485 communication interface using a proprietary
bus protocol.
– The StecaLink slave connection allows connection of superordinate communication levels
and control devices. The superordinate communication partner functions as the master and
controls the device via the StecaLink slave interface.
– A standard RJ45 network cable (CAT-5 Patch cable, 1:1) is used for connecting StecaLink
communication bus members.
– The last unused StecaLink slave connection of a communication chain must be terminated.
A termination plug can be acquired separately at your Steca dealer.
– A StecaLink slave device may only be connected to one StecaLink master. Multiple Steca-
Link slave devices are connected to form a communication chain. Only one StecaLink slave
device is connected to the StecaLink master device.
– Up to 5 PA HS 400 current sensor units can be connected via the StecaLink master socket
to a Tarom 4545 / Tarom 4545-48.
– The StecaLink slave bus is not galvanically isolated from the power supply unit of the
Tarom 4545 / Tarom 4545-48.
– At the device, at the StecaLink master connection, a supply voltage is available for slave
devices that do not have an own voltage supply. By connecting a slave to the StecaLink
master, the supply voltage is looped through the slave members.
– Each slave must have its own unique address within a range of 1 to 99. No duplicate ad-
dresses may be present. Set the address of the slave according to the slave manual.
– The maximum length of the entire bus cabling should not exceed 25 m.
– The Tarom 4545 / Tarom 4545-48:
– has 2 StecaLink slave bus connections,
– is a slave for Tarom MPPT 6000-M devices at the StecaLink slave connection,
– has a StecaLink master connection,
– is always the master at the StecaLink master connection.