Product description
3.5 System environment
7KT PAC1200 multichannel current measuring system
22
System Manual, 11/2016, 2514374103-02
Table 3- 3
③
Sensor: Indicates sensor readiness
Status
Readiness for operation
Off
No sensor connected
Green, continuous
All sensors online and in measuring mode
Status indication via LEDs of the sensor bar
Status
Readiness for operation
Blue, continuous
Connected
Blue, flashing
Sensors scanned
3.5
System environment
The Data Manager is installed in the fuse cabinet where it is connected after the main fuse in
the subdistribution board. The device must be connected to all three phases of the power
system at the time of installation so that the overall energy consumption can be correctly
measured.
The sensor bar is connected via RS485. The sensor bar and the connected sensors are
located on the individual fuses in the fuse cabinet. Up to 8 sensor bars with 12 sensors each
can be connected, giving a total of 96 sensors in the maximum configuration. The length of
cable between the Data Manager and a maximum of 8 sensor bars must not exceed 10
meters.
The Data Manager is connected by LAN (if necessary via an additional router) to the PC
running the Siemens-specific Sentron software.
In communication via LAN, the Data Manager is the Modbus / TCP slave, while the PC with
the Sentron software is the Modbus / TCP master. The data are sent continuously to the
higher-level management system while a connection is present.
Note
A continuous data connection to the Sentron software is required. If the data connection is
interrupted, no data are buffered on the Data Manager.
In communication via RS485, the product is the Modbus / RTU master, and the connected
sensor bars are the Modbus slaves.