Siemens SENTRON PAC2200, Product Manual, Page: 53 / 130

Connection
4.5 Gateway (slave)
PAC2200
Equipment Manual, 12/2019, L1V30415167B-03
51
4.5 Gateway (slave)
The PAC device family has an extensive portfolio. Different devices can combine with or
complement each other with regard to functionality.
One very practical application is the use of a PAC4200 device in combination with an RS485
expansion model as a gateway.
This allows devices (slaves) that are connected to the RS485 expansion module of the
PAC4200 to be connected to a device over Ethernet (master).
Further information and a configuration description can be found in PAC4200 Manual
( https://support.industry.siemens.com/cs/ww/en/view/34261595 ) (chapter 3.12).
Figure 4-6 Connection of several PAC2200s to the gateway
Note
RS485 termination is recommended
In order to avoid reflection on the bus cable, we recommend fitting a 120 Ohm terminating
resistor at the beginning and end of the bus cable.
To establish MODBUS RTU communication, the communication parameters must be known.
These include baud rate and format. Furthermore, the slave address must be entered in the
PAC2200 device.
See also
PAC4200 Manual ( https://support.industry.siemens.com/cs/ww/en/view/34261595 )