Publication PSS-SG001A-EN-P – June 2005
Power Supply Distance Rating
Modules are placed to the right of the power supply. Each
Isysnet module can be placed in any of the slots to the right of
the power supply until the usable backplane current of that
PointBus Current Requirements
Catalog Number PointBus Current Requirements
PSSN8xxx
PSSP8xxx 75 mA
PSST8xxx
PSSTR4MRA 90 mA
PSSNACM12A
PSSTACM12A
75 mA
PSSNAVM12A
PSSTAVM12A
PSSS23A
75 mA
PSSV32A
supply has been exhausted. An adapter provides 1 A current
to the PointBus. The PSSSE24A provides up to 1.3 A and I/O
modules require from 75 mA (typical for the digital and analog
I/O modules) up to 90 mA or more.
Step 5 – Placing Isysnet Modules
Determining Mounting Requirements
The producer/consumer model multicasts messages. This
means that multiple nodes can consume the same data at the
same time from a single device. Where you place I/O modules in
the control system determines how the modules exchange data.
Maximum Size Layout
PointBus Current (mA) Maximum I/O Modules Maximum I/O Modules Maximum Number of
with 24VDC Backplane with Expansion I/O Module
Current at 75 mA each Power Supplies Connections
PSSCDM12A on DeviceNet
PSSCDM18PA on DeviceNet
PSSCCNA on ControlNet 1000 Up to 13 63 5 rack and 20 direct
PSSCENA on EtherNet/IP
20 total connections
including rack and direct
PSSCPBA on PROFIBUS
Not to exceed scanner
Horizontal mounting:
capacity
1A@5Vdc for 10...19.2V
input; 1.3A @ 5VDC for
PSSSE24A Expansion Power 19.2...28.8V input
Vertical mounting:
1A @ 5VDC for
10...28.8V input
For a Rockwell controller to control Isysnet, the I/O must be:
• On the same network as the controller or
• On a ControlNet network that is local to that controller or
• On an EtherNet/IP network that is local to that controller
Isysnet 15
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