The Emerson EPXPNS001, also cataloged as the EPXPNS001 PROFINET Network Adapter, operates as a dedicated hardware component for industrial Ethernet bus translation and local expansion power distribution within Emerson PACSystems RSTi-EP platforms.
Hardware Specifications
Parameter
Specification
Model
EPXPNS001
Brand
Emerson
Origin
USA
Weight
0.12 kg
Dimensions
120 mm x 11.5 mm x 76 mm
Operating Temp
-20 to 60 deg C
Power Consumption
Operating Voltage 20.4 - 28.8 VDC
Communication Protocol
PROFINET v2.3 Class C (IRT)
Physical Interface
2 x RJ-45 Ports
Module Expansion Capacity
Up to 64 Active I/O Modules
Backplane Bus Communication Velocity and Deterministic Networks
The EPXPNS001 acts as a deterministic PROFINET network gateway supporting Class C Isochronous Real-Time (IRT) Ethernet execution across dual RJ-45 ports. Integrated high-speed backplane bus communication velocity allows cycle times down to sub-millisecond ranges while serving as the primary power and data head for up to 64 active RSTi-EP slice I/O modules. The internal bus repeater stabilizes logic voltage rails and decouples network jitter from field I/O expansion slices.
Frequently Asked Questions
Q: Does the EPXPNS001 support hot-swapping of downstream I/O modules on the RSTi-EP bus?
A: Yes, downstream RSTi-EP I/O modules can be replaced under power without interrupting PROFINET bus traffic or power pass-through running via the network adapter module.
Q: What network topologies are natively supported by the dual RJ-45 Ethernet ports on the EPXPNS001?
A: The integrated two-port Ethernet switch supports Line, Star, and Ring network topologies, including Media Redundancy Protocol (MRP) for deterministic network recovery.
Field Installation Guidelines
Snap the EPXPNS001 network adapter onto a standard 35 mm DIN rail (TH35) before locking adjacent I/O expansion slices into place.
Connect the primary 24 VDC system power feed to the front-facing push-in spring terminals, ensuring correct polarity (20.4 to 28.8 VDC operating range).
Insert industrial-grade Category 5e/6 shielded Ethernet cables into ports X1 and X2, verifying that the connector latch clicks securely into the RJ-45 housing.
Terminate the DIN rail directly to Functional Earth (FE) using low-impedance grounding straps to establish shield continuity for high-frequency noise rejection.
