1
Introduction
2
Siemens Energy & Automation, Inc.
1.4.1
PLC to SEAbus
The basic configuration is a PLC attached to port 1 of
the DTU3005, and the Siemens ACCESS devices
attached to port 2. This is shown below in
Figure 1.2
.
Port 3 can be configured as a passthrough to the SEA-
bus devices. This allows a personal computer running
Siemens WinPM™ or other supervisory software to
connect directly to the SEAbus devices at the same
time as the PLC. This is shown in
Figure 1.3
. An addi-
tional DTU3005 device can be attached to port 3. Up to
32 DTU3005 devices can be daisy chained together,
each connected to up to 32 Siemens devices. This is
shown in
Figure 1.4
.
Figure 1.2
PLC to SEAbus Application
Figure 1.3
PLC to SEAbus with Passthrough
Figure 1.4
Daisy Chained DTU3005 Units
1 2 3
DTU3005B
Up to 32
ACCESS Devices
Supported PLC
Acting as a
master transferring
data to PLC.
RS-485
1 2 3
DTU3005B
WinPM
Up to 32
ACCESS Devices
Supported PLC
Acting as a
master transferring
data to PLC.
RS-232
RS-485
