Gateway (Slave) - Siemens SENTRON PAC2200 Product Manual

Connection

4.5 Gateway (slave)

4.5 Gateway (slave)
The SENTRON 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 RS
485 expansion model as a gateway.
This allows devices (slaves) that are connected to the RS 485 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
Note
RS 485 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, 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)
48
Connection of several PAC2200s to the gateway
PAC2200
Manual, 05/2018, L1V30415167B-02