Data Sheet for Product

Page 2 of 8 Siemens Industry, Inc.
Modbus Driver on the PXC Series Platform
Functionality
Notes on System Architecture
The Modbus Driver in RTU Master Mode, with Firmware 2. x (Figure 1), supports the
following:
● Three physical FLNs (FLN 1 through FLN 3) on PXC Modular hardware, which
can be used for connecting and addressing either Modbus RTU or P1 devices on
RS-485 FLNs.
● Up to two physical FLNs (FLN 1 through FLN 2) on PXC-36 hardware, depending
on the ALN chosen, which can be used for connecting and addressing either
Modbus RTU or P1 devices on RS-485 FLNs.
● With Firmware 3.5 and later, one physical FLN (1) on the BACnet/IP PXC-24 and
PXC-16 hardware can be used for connecting and addressing either Modbus RTU
or P1 devices on RS-485 FLNs.
● Up to 247 device addresses per FLN.
● TX-I/O Modules.
● Maximum of 8,000 APOGEE points per driver.
Figure 2: System Architecture—Modbus RTU Master Mode (Firmware 3.x).