EMG8508 Series

8-Port EN 50155 Certified Railway IP67 waterproof
Managed Gigabit PoE Switch

  • 8 x 10/100/1000 BASE-T(X) ports, M12 connector
  • Up to 8 x 802.3af or 802.3at compliant PoE ports providing maximum 240W PoE power budget
  • EN50155, EN50121-4, IEC60571 and UL 61010-2-201 certified
  • Redundant power input, DC or High Voltage DC
  • Ruggedized IP67 aluminum enclosure
  • Works from -40°C~75°C
  • 2x Relay outputs, 5-pin M12 A-Coding
  • Profinet Conformance Class B compatible
  • Security features based on IEC62443-4-2
EMG8508 Series
EMG8508 Series

ATOP’s EMG8508 IP67-rated Railway-compliant Ethernet switch is the best solution for providing high-speed Gigabit connectivity in track-side or on-board Railway applications. Its rugged, aluminum enclosure can effectively protect the Switch core in any environment.

The 8-M12 Connectors Gigabit ports can supply up to 30W of PoE Power (802.3af or 802.3at) to your PoE device providing an overall maximum budget of 240W. This makes EMG8508 the ideal solution for on-board or off-board surveillance by simplifying the wiring where it’s difficult, risky and expensive to introduce new elements.

The embedded redundant-power supply input provides a reliable and failure-proof safety mechanism to minimize down-times. EMG8508 comes in either redundant Low-Voltage DC power input (12~57 VDC, 47~57 VDC for PoE models) or in redundant High-Voltage DC power input (50~145 VDC). Each power module, including a Relay-output alarm, uses a S-coding M12 connector that makes EMG8508 ideal and simple for engineers setting up a Fault-Alarm System.

To prevent network intrusions, it is necessary to have a good accessing control mechanism that can identify, authenticate and authorize users. EMG8508 supports user account, password policy, and authentication interface managements functions that comply with IEC62443 standard.

Its IP67 housing protection, combined with a wide operating temperature of -40 to 75°C and wall mounting capacities make it suitable to most Railway applications in harsh environments or industrial field applications.

Switch Properties 
Priority Queues8
VLAN Table4,096
MAC-Based VLAN512
VLAN ID RangeVID 1 to 4,094
Trunk Group4
Static IGMP Groups128
Dynamic IGMP Groups256
MAC Table Size16k
Packet Buffer Size1.5 MB
Jumbo Frame9216 Byte
StandardsIEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3z for 1000BaseX
IEEE 802.3af / 802.3at for Power over Ethernet
IEEE 802.3x for Flow Control, back pressure flow control
IEEE 802.1d-2004 for Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1s for Multiple Spanning Tree Protocol
IEEE 802.1Q for VLAN Tagging
IEEE 802.1p for Class of Service
IEEE 802.1X for Authentication
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3az for Energy Efficient Ethernet
ProtocolsIPv4, IPv6, IGMPv1/v2/v3, IGMP Snooping,GARP,GMRP, GVRP, SNMPv1/v2c/
v3, SNMP Inform, ICMP, Telnet, SSH, DHCP Server/Relay/Client, DHCP Option
66/67/82, BootP, RARP, TFTP, NTP Server/Client, SNTP, SMTP, SMTP (Gmail),
RMON, HTTP, HTTPS, Syslog, MRP (Client), LLDP, IEEE 1588 PTP V1/V2,
IEEE 1588 Hardware E2E Transparent Clock, 802.1x, EAP, RADIUS, TACACS+,
Mirror port, QoS, ACL, Serial Console, U-Ring, STP, RSTP, MSTP, Redundancy
Compatible Ring, Voice VLAN, sFlow, PoE continue
RedundancyITU-T G.8032 ERPS, STP, RSTP, MSTP, MRP(Manager/Client), Compatible Ring/Chain, U-Ring
Automation ProfilesModbus/TCP status registers
RFC 1157, RFC 1213, RFC 1215, RFC 1493, RFC 1643, RFC 1757, RFC 2011,
RFC 2012, RFC 2013, RFC 2233, RFC 2571, RFC 2742, RFC 2819, RFC 2863,
RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 2674
Ethernet Ports8 x 10/100/1000BASE-T(X) auto negotiation speed - M12 connector
Fiber Optics PortsNone
ConsoleRS232 (A-coding M12 connector)
LED IndicatorsPWR1, PWR2, Alarm, Ethernet Act/Link, SFP Link, PoE, Ring
Relay Output2 relay outputs with current carrying capacity of 1A @ 24 VDC (through A-coding M12 connector)
Input Voltage50~145 VDC for High voltage product
12~57 VDC for Non-PoE models
45~57 VDC for 802.3af mode /51~57 VDC for 802.3at mode
Input Current/Power (System) 50 – 145 VDC, 0.27A max. , 13.5W (For High voltage Models)
12 – 57 VAC, 1.19A max. , 14.28W (For Non-PoE Models)
Input Current (with PoE, full loading)45 – 57 VDC, 3.08A max. , 138.6W (PoE 802.3af Mode, 8-ports)
51 – 57 VDC, 5.03A max. , 256.53W (PoE 802.3at Mode. 8-ports)
Power Input2 x S-Coding M12 connectors (4 Pin)
Reverse Polarity ProtectionYes
Physical Characteristics 
HousingIP67 protection according to EN 60529
Dimension (W x H x D)216 x 232 x 72 mm
InstallationWall-mount (Optional Din-Rail Kit)
SafetyEN 60950-1:2006, UL/IEC(CB) 61010-2-201
EMCFCC Part 15, Subpart B, Class A
EN 55032, EN 55024, EN 61000-3-2, EN 61000-3-3, EN 61000-6-2, EN 61000-6-4
RoHS 2Yes
Rail TrafficEN50155, EN50121-4, IEC60571, EN45545-2
IEC 61000-4-2ESDContact Discharge±8kV4
IEC 61000-4-2ESDAir Discharge±15kV4
IEC 61000-4-3RS80-1000MHz10 V/m3
IEC 61000-4-4EFTDC Power Port±2.0KV3
IEC 61000-4-4EFTAC Power Port
IEC 61000-4-4EFTSignal Port±2.0KV4
IEC 61000-4-5SurgeDC Power Port (L-2-L)±1.0KV3
IEC 61000-4-5SurgeDC Power Port (L-2-E)±2.0KV3
IEC 61000-4-5SurgeAC Power Port (L-2-L)±1.0KV3
IEC 61000-4-5SurgeAC Power Port (L-2-E)±2.0KV3
IEC 61000-4-5SurgeSignal Port (L-2-E)±2.0KV3
IEC 61000-4-6CS0.15-80MHz10 V rms3
IEC 61000-4-8PFMFEnclosureDC 300A/m3
IEC 61000-4-11DIPAC Power Port DC 300A/m-
ShockMIL-STD-810G Method 516.5
DropMIL-STD-810F Method 516.5
VibrationMIL-STD-810F Method 514.5 C-1 & C-2
Warranty5 Years
MTBF19.08 years (mean avg. per model; MIL-HDBK-217F-based prediction)

Product Layout

Mechanical Dimensions (Unit = mm)

DIN-Rail Kit 70100000000062G DIN Rail accessories with screw
VESA Kit70100000000063GVESA accessories with screw
SDR-75-2450500752240001GDIN RAIL POWER SUPPLY / T;AC 88~264V to 24VDC 3.2A;75W
SDR-240-4850502401480001GDIN RAIL POWER SUPPLY / T;AC 100~240V to 48V DC 5A;240W
SDR-480-4850504801480001GDIN RAIL POWER SUPPLY / T;AC 100~240V to 48V DC 10A;480W
M12 Sealing Cap Plastic3990079G Plastic sealing cap for unoccupied M12 plugs (1560251)
M12 Sealing Cap Metal59908571GMetal sealing cap for unoccupied M12 plugs (1430488)
M12 screw plug Plastic3990078GPlastic Screw Locking for unoccupied M12 sockets (1553129)
M12 screw plug Metal59908561GMetal Screw Locking for unoccupied M12 sockets (1503302)


Version Name Time Size Download
v5.60 Management Utility for Windows 2021-01-18 23.65 MB
v5.20 Management Utility for Windows 2016-10-28 16.21 MB
See in NMU Network Management Utility 2020-10-20 0 B


Version Name Time Size Download
v7.70 EMG85XX Firmware 2022-10-24 17.44 MB
v7.38 EMG85XX Firmware 2021-12-06 15.95 MB
v2.88 EMG85XX Firmware 2020-12-18 14.48 MB
v2.68 EMG85XX Firmware 2020-06-18 13.73 MB
v2.20 EMG85XX Firmware 2017-12-14 13.55 MB


Version Name Time Size Download
v1.4 Datasheet EN 2022-10-24 876.89 KB
v1.2 Datasheet EN 2020-12-18 651.77 KB
v1.1 Datasheet EN 2020-05-11 601.85 KB
v1.0 Datasheet EN 2020-01-10 623.83 KB
v0.9 Datasheet EN 2019-10-03 600.93 KB
v0.8 Datasheet EN 2019-08-29 596.21 KB
v0.7 Datasheet EN 2018-04-19 592.61 KB


Version Name Time Size Download
v2.0 EHG75XX/ EMG85XX/ RHG75XX/ EHG95XX User Manual 2022-10-24 5.59 MB
v1.7 EHG75XX/ EMG85XX/ RHG75XX/ RHG95XX/ EHG95XX User Manual 2020-12-18 5.42 MB
v1.6 EHG75XX/ EMG85XX/ RHG75XX/ RHG95XX/ EHG95XX User Manual 2020-06-18 5.29 MB
v1.5 EHG75XX/ EMG85XX/ RHG75XX/ RHG95XX/ EHG95XX User Manual 2020-01-21 5.3 MB
v1.4 EHG75XX/ EMG85XX/ RHG75XX/ RHG95XX/ EHG95XX User Manual 2017-09-28 5.41 MB

Hardware Installation Guide

Version Name Time Size Download
v2.0 EMG8508/EMG8510 Hardware Installation Guide 2017-09-07 6.54 MB


Version Name Time Size Download
EMG85XX MIB 2022-12-05 20.71 KB

Test reports

Version Name Time Size Download
EMG85XX Declarations of Conformity 2023-03-20 316.2 KB
v1.0 EMG8508-EMG8510 Certifications CE 2019-11-19 3.55 MB
v1.0 EMG8508-EMG8510 Certifications EN45545 2019-11-19 1.79 MB
v1.0 EMG8508-EMG8510 Certifications EN50155 EN50121-4 2019-11-19 5.13 MB
v1.0 EMG8508-EMG8510 Certifications FCC 2019-11-19 1.28 MB
v1.0 EMG8508-EMG8510 Certifications IEC(CB) 2019-11-19 462.75 KB
v1.0 EMG8508-EMG8510 Certifications IEC60571 2019-11-19 3.94 MB
v1.0 EMG8508-EMG8510 Certifications UL 2019-11-19 12.81 MB

Featured Products


Copper to Fiber Optic Transceiver:  10 / 100 Mbps, Auto-Negotiation, Interface-SERDES, 3.3V

  • 10 / 100 Mbps data rate
  • Auto-Negotiation
  • SERDES Interface
  • 3.3V power supply
  • Lan Cable: Over Cat5
  • Operating temperature from -40° to 85° C

Atop NMU

Network Management Utility

  • Discover and visualize network devices and physical connections automatically
  • Manage configurations and firmware for ATOP switches centrally
  • Set up smart alarms and notifications for events by defining custom-threshold and duration
  • Group and manage Ethernet by different IP ranges


Unmanaged Fast Ethernet Switch, 5-Port Slim-Type, Plastic Housing

  • 5 x 10/100 BaseT(X) RJ45 port
  • Broadcast storm protection
  • Support IEEE802.3/802.3u/802.3x
  • Support 802.1q/p for VLAN tagging and class of service
  • Auto MDI/MDI-X
  • Redundant DC power inputs
  • Operation temperature from 0 °C to 60 °C
  • DIN-Rail mounting
  • Slim type, plastic housing

EHG6408 Series

Industrial 8-port unmanaged 24V PoE Gigabit Switch with voltage booster (12~57V)

  • 8 x 10/100/1000 BASE-T(X) ports or
  • 8 x 10/100/1000 BASE-T(X) ports with 2 x 100/1000 SFP slots or
  • 8 x 10/100/1000 BASE-T(X) ports with 2 x 1000 BASE-X SFP slots
  • Optional PoE ports with booster function (12~57 VDC)
  • IP30 aluminum with DIP-Rail / Wall mount (optional)
  • Operating range of -40°C to +75°C
  • CB/IEC60950-1&62368-1 and UL/cUL62368-1


Compact plug-on RS-232 to RS-485/422 media converter

  • Maximum Communication Speed: 500Kbps
  • Industrial Grade Temperature: -40~85°C
  • ESD Protection (IEC 61000-4-2: ESD level 3 protection)
  • External power not required (When RTS/DTR signal line is enabled)
  • Compact size
  • Hardware-based Auto Toggling
  • RS422/RS485 mode selectable by external switch
  • Built-in 120Ω termination resistors, selected by external switch
  • 3kV isolation
  • LED port power indicator