IFS MC251-4P/1S and NS2051-4P/1T User
Manual
Overview
The MC251-4P/1S Industrial 802.3af Power over Ethernet
Media converter and NS2051-4P/1T 802.3af PoE switch fully
comply with the IEEE 802.3 10Base-TX and IEEE 802.3u
100Base-TX standards. The MC251-4P/1S and the NS2051-
4P/1T Industrial 802.3af Power over Ethernet Media converters
also supports IEEE 802.3x flow control and back pressure
standard in half-duplex to eliminate packet loss.
Package contents
Unless specified, the term "industrial fast Ethernet switch"
mentioned in this user manual refers to the MC251-4P/1S and
the NS2051-4P/1T.
Open the box of the industrial fast Ethernet switch and
carefully unpack it. The box should contain the following items:
•
Industrial fast ethernet switch × 1
•
CD with user manual × 1
•
DIN rail kit × 1
•
Wall-mount kit × 1
If any of these are missing or damaged, please contact your
dealer immediately. If possible, retain the carton including the
original packing material, and use them again to repack the
product in case there is a need to return it to us for repair.
Product features
Physical port
Model
Ports
Name
Copper
Optical
NS2051
NA
5 x
-4P/1T
10/100Base-
TX
MC251-
4x
1 x
4P/1S
10/100Base-
100Base-
TX
FX
IEEE 802.3af PoE
•
Complies with IEEE 802.3af Power over Ethernet End-
Span PSE
© 2019 United Technologies Corporation.
Interlogix is part of UTC Climate, Controls & Security, a unit of United Technologies Corporation. All rights reserved. All trademarks are the
property of their respective owners. Information in this document is subject to change without notice.
Fiber Optical Interface
Mode
Connector
Distance
NA
NA
NA
Depends
Depends
Depends
on SFP
on SFP
on SFP
Module
Module
Module
•
Up to four IEEE 802.3af devices powered
•
Supports PoE Power up to 15.4 W for each PoE port
•
Auto detect powered device (PD)
•
Circuit protection prevent power interference between
ports
•
Remote power feeding up to 100 m
Layer 2 features
•
Complies with IEEE 802.3 10Base-T, IEEE 802.3u
100Base-TX / 100Base-FX Ethernet standard
•
Supports Auto-Negotiation,10/100Mbps Half / Full Duplex
and Auto MDI/MDI-X
•
High performance Store and Forward architecture,
Runt/CRC filtering eliminates erroneous packets to
optimize the network bandwidth
•
Prevents packet loss with Back Pressure (Half-Duplex)
and IEEE 802.3x PAUSE Frame Flow Control (Full-
Duplex)
•
Backplane (Switching Fabric): 1 Gbps
•
Automatic address learning and address aging
•
Integrated address look-up engine, supports 2K absolute
MAC addresses
•
CSMA/CD Protocol
Industrial case / installation
•
IP-30 Aluminum Metal case / Protection
•
DIN Rail and Wall Mount Design
•
Redundant Power Design: 24 or 48 VDC, redundant
power with polarity reverse protect function
•
Supports EFT protection 6000 VDC for power line
•
Supports 6000 VDC Ethernet ESD protection
•
-40 to 75°C operating temperature
Installation
This section describes the functionalities of the Industrial Fast
Ethernet components and guides how to install it on the
desktop. Basic knowledge of networking is assumed. Please
read this chapter completely before installation.
P/N 1072572-EN • REV A • ISS 25JAN19
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